Though your metabolism IS constantly at work, it does slow down later in the day, especially if you are just dieting and not exercising. When you exercise your heart rate and...
Somthing's fishy about your lab results. The improvement in your cholesterol levels may be due to the foods you replaced with the fish, rather than the fish in and of itself. The fats found in some varieties of fish, omega-3 fatty acids, reduce triglyceride levels in the blood, but generally do not affect cholesterol levels.
However, you're still doing yourself a favor by feasting on fish. Eating fish offers many major health advantages. The primary benefit found from including fish oils in your diet is the lowered risk for sudden cardiac death. This means that fish eaters decrease their chance of dying suddenly from a heart attack (keep in mind that there are different types of heart attacks).
Two mechanisms explain how eating fish reduces the chance of heart attack. First, it seems that fish oil fatty acids reduce blood clotting by decreasing the stickiness of blood platelets. Second, omega-3 oils may play a role in stabilizing heart rhythms. It could be that the electrical impulses that go awry during some heart attacks are preserved in fish eaters. These protective qualities may work together, resulting in the reduced risk of sudden cardiac death that has been observed among fish consumers. Other possible health benefits of omega-3 fatty acids are their potential to help lower blood pressure and protect against some forms of stroke.
Remember, it is possible to have too much of a good thing. There are certain risks associated with eating too much fish. The main risk has to do with the toxicity of environmental contaminants, primarily mercury, which ends up in fish due to environmental pollution. Because of this, women who are pregnant or breastfeeding are often advised to avoid fish. In addition, there are various recommendations for eating fish to avoid consuming dangerous levels of mercury, as its toxicity can damage the brain, kidneys, and lungs. Mercury levels may be especially high in shark, swordfish, king mackerel, and tilefish.
But in moderate amount, fish can be beneficial, especially for people eating a western diet that is often low in omega 3s. Good sources of omega 3 include:
- Mackerel (watch out for the higher mercury levels in king mackerel)
- Rainbow and lake trout
- Albacore, blue fin, and yellow fin tuna (including the canned type)
- Striped sea bass
- Swordfish (watch out for higher mercury levels)
Fish oil supplements, on the other hand, contain almost no toxic contaminants and thus are safe. However, they can cause gastric symptoms, so it is best to take them with food. People with low blood pressure or who are taking medication for low blood pressure should also be careful about eating too much fish, since the fish oil could lower blood pressure even more. In very high amounts, fish oils can have some anti-coagulant effects, causing nosebleeds in some people.
Eating these jewels of the sea even once or twice a week may lead to heart healthy benefits. Obviously an all-around healthy diet will provide even more protection from heart disease, and other maladies, too.
In order for coffee to qualify as decaffeinated, it must have at least 97 percent of its caffeine removed. What does that chock up to? An eight-ounce cup of decaf coffee would have no more than 5 or fewer milligrams of caffeine (compared to the range of 40 - 180 mg. typically found in one eight-ounce cup of brewed, dripped, or percolated java). Your concern over the safety of decaffeinated coffee probably stems from solvents used in the past.
Today, most processors use safe methods to remove caffeine. A few different techniques are available, and understanding them may help allay your concerns about coffee contaminants. Coffee beans are decaffeinated by softening the beans with water and using a substance to extract the caffeine. Water alone cannot be used because it strips away too much of the flavor. The goal is to extract the caffeine with minimal loss of flavor. Substances used to remove the caffeine may directly or indirectly come in contact with the beans, and so the processes are referred to as direct or indirect decaffeination.
In one process, coffee beans are soaked in water to soften them and dissolve the caffeine. The water containing the caffeine (and the flavor from the beans) is treated with a solvent, heated to remove the solvent and caffeine, and then returned to the beans. The flavors in the water are reabsorbed by the beans, which are then dried. This process is referred to as "indirect decaffeination," because the beans never touch the solvent themselves. The most widely used solvent today is ethyl acetate, a substance found in many fruits. When your coffee label states that the beans are "naturally decaffeinated," it is referring to this process, specifically using ethyl acetate. Although it doesn't sound like a natural process, it can be labeled as such because the solvent occurs in nature. Other solvents have been used, some of which have been shown to be harmful. One, methylene chloride, has been alleged to cause cancer in humans and therefore is not often used. Back in the 1970s, another solvent, trichloroethylene, was found to be carcinogenic and is no longer used.
Another indirect method soaks the beans in water to soften them and remove the caffeine, and then runs the liquid through activated charcoal or carbon filters to decaffeinate it. The flavor containing fluid is then returned to the beans to be dried. This charcoal or carbon process is often called "Swiss water process" (developed by a Swiss company). If your coffee is labeled naturally decaffeinated or Swiss water processed, you can be assured that no harmful chemicals are used. If you are uncertain, you can ask or call your coffee processor to learn about the method used.
A direct decaffeination process involves the use of carbon dioxide as a solvent. The coffee beans are soaked in compressed CO2, which removes 97 percent of the caffeine. The solvent containing the extracted caffeine evaporates when the beans return to room temperature.
So go ahead and enjoy that Cup of Joe — caffeine free!
Feeling fruity? Devoted fruitarians say they feel better eating in this style, that it makes their life easy, and they feel it is beneficial for the environment. Fruitarian diets include all sweet fruits and vegetable fruits — including (but not limited to) tomato, cucumber, peppers, olives, avocadoes, and squash. Some fruitarians add grains, beans, nuts, and seeds to their eating plans. If these foods are included, the proportions are generally about 70 - 80 percent sweet and vegetable fruits, with some beans, smaller amounts of grains and tofu, and a sprinkling of nuts and seeds. Many fruitarians prefer to eat their food raw. Depending on which items are included, some may have to be cooked.
The human body needs a variety of nutrients. Because fruitarian diets provide fewer calories and protein than vegetarian diets, they are not suitable for teens. For a teen, the implications of missing many nutrients can have long lasting effects. Following this eating plan can cause your body to fall short on calcium, protein, iron, zinc, vitamin D, most B vitamins (especially B-12), and essential fatty acids. Not only could your height be affected, your bones may not reach their peak density, and vital nutrients for nervous system development may be missing in your diet. It's important to understand that one food cannot provide the multitude of nutrients found in a mixed eating plan.
Such a restrictive eating plan for a teen also presents other concerns. Have you thought about why you feel this eating style might be right for you, and what the ramifications also could be? If you're considering fruitarianism as a means to lose weight, or deflect attention from food issues, you are better off addressing these concerns directly. Restrictive eating can lead to hunger, cravings, and food obsessions. Also, keep in mind that a diet of one food (or of one food group) is not an effective way to cleanse the body.
As you move into adulthood, you may become interested in trying out different diets to improve your health and nutrition. For your future reference, it is recommended that adults only adhere to a fruitarian diet for a limited period of time. This is because fruitarian adults (just like their teen counterparts) can experience deficiencies in calcium, protein, iron, zinc, vitamin D, most B vitamins (especially B12), and essential fatty acids.
Lastly, keep in mind that a limited diet may cause certain social disruptions. Meals with family and friends may become more difficult. Some people with less flexible food options report social isolation.
Just planting a few seeds to think about. Now let your knowledge grow!
You and your friends have picked up on a popular debate. One aspect of weight management that is vital to understand is that we gain and lose weight over periods of time — weeks, months, years — not hour by hour. This happens as we take in more calories than we expend. Another important fact of metabolism is that our bodies do not stop working, even when we are sleeping! Hearts are beating, blood is circulating, lungs are functioning, brains are even working. This all takes energy — meaning we are still burning calories.
There is no magic time after which the body stores fat. For instance, if you eat the same exact meal at 6 pm or at 8 pm, is one more caloric than the other? No, each meal has the same number of calories. What really matters is the total amount of food and drink you have over the course of a week, or a month or longer, and how much energy you expend during that timeframe. Excess calories will be stored as fat over time, regardless of whether they are taken in during the day or night.
When it comes to eating late at night and the potential for weight gain, there are several considerations:
- Portion sizes — waiting to eat could lead to consuming larger portion sizes.
- Quality of food — after a long day of work or school, a few slices of pizza or a fast burger may seem easier than steamed vegetables and broiled fish.
- "Mindless snacking" — evenings spent studying, going out, or watching TV may lead to excess calories from fast, sugary, on-the-go options.
- Health concerns — consistent periods of going without food followed by a large meal can negatively impact the interaction between blood sugar and insulin and make you more vulnerable to Type 2 diabetes.
So, to settle the debate, you are correct that late-night calories won't change your metabolism or magically count more than calories eaten during the day. However, limiting late-night meals and snacks may be an effective weight management strategy for some because it helps them to control their overall calorie intake. Some people find that if they set a time that they can't eat past, it helps minimize or eliminate the possibility of munching on a lot of high calorie foods. Another useful tip may to be to eat four or five smaller meals and snacks spread evenly throughout the day so you don't become overly hungry at any point. Following these tips can keep your energy levels consistent for work and play and can provide some long-term benefits to help you reduce your chances for diabetes or other health issues.
June 29, 200721199
Though your metabolism IS constantly at work, it does slow down later in the day, especially if you are just dieting and not exercising. When you exercise your heart rate and metabolism both increase. In addition it is better to eat more meals and take in the same amount of calories because in doing so you keep your metabolism working. On the other hand if you eat less or worse starve yourself for several hours your metabolism slows down and potentially puts your body into a "starvation mode" where more insulin is released causing the body to store more fat. This is the most simple answer to this question.
Dear Confused and College Bound,
You are not alone with your concerns. Going to college is a big step in a person's life involving major changes. You and those around you may be living on your own for the first time, making decisions on a buffet of issues, including what to eat.
Eating healthy at college is possible. Many college dining services are offering more healthy choices and are often quite receptive to students' concerns and dietary preferences. But, this is only part of the challenge. In an environment where time, friends, and finances may combine in new ways, having options available only solves some of the puzzle. It's important to experiment with what works best for you. For example, that traditional idea of three square meals a day has been updated with a more contemporary concept of eating five smaller meals spread throughout the day. Steer clear of diets or fads, especially those that drastically limit a particular nutrient. Remember, balance, moderation, and variety win out over trendy and extreme. For some practical tips, navigate through the many options on Choosemyplate.gov. Columbia students can also take advantage of the resources from the get balanced! initiative. Plan ahead when possible so you don't have to rely on vending machines when you're hungry; think of ways to incorporate fruits, vegetables, and whole grains on a daily basis. Eating more of these will fill you up and possibly even enhance your already stellar brain power.
Making time for physical activity is important, too. Most college fitness centers have a variety of movement classes and options. When the weather is right, grab a friend and walk, run, bike, or blade outdoors. If you are Columbia affiliated, you can connect with the CU Move initiative. CU Move encourages members of the Columbia community to engage in active lives that include regular physical activity. The program provides participants with motivation, incentives to be active throughout the year, and event calendars with access to plenty of free and low-cost physical activity options on campus and around NYC.
Now, to address the second part of your question: an eating disorder, such as anorexia nervosa, is less about food, eating, and body weight. It has more to do with mental health, emotional, physical, socio-cultural, and family issues. If this is a particular concern of yours, you might want to take a look at Eating disorders vs. normal eating. Additionally, if you are a Columbia student, you can make an appointment with a health care provider or a registered dietitian to discuss your concerns by contacting Medical Services (Morningside) or the Student Health Service (CUMC).
Give yourself some time to adjust to a new environment and ask for help when you need it. Everything in moderation, even moderation.
Enjoy your time at college,
Dear Joyful Juicer,
Juicers can be a great low calorie, high nutrient, tasty treat. However, they don’t generally carry all the benefits of eating the original fruit or veggie from whence it came.
If you've made juice, you know that it takes a lot of fruit to make a container of juice. Usually, juicers extract the juice and some pulp from fruits and/or vegetables. You’ll get all of the vitamins, minerals, beneficial plant chemicals (phytochemicals), and carbohydrates in juice that's extracted from a whole fruit. However, you won’t get much of the fiber, and depending on the fruit, you may not get any of it.
Fiber aids in the digestive process. It acts sort of like a scrub brush for your intestines and speeds up the movement of waste through your system. It also can fill you up, and may help protect against certain cancers. Fiber in fruit is found in the membranes between sections, the white part around the outside (as in oranges and grapefruits), the seeds, the skin, and the peels. For example, orange juice contains no fiber (even if it has pulp) because the fiber is found in the membrane, which is lost during the process of juicing.
It is also important to remember that juice is not a low calorie drink. An eight ounce glass of orange juice contains 110 calories — the equivalent of two oranges (each contains about 60 calories). But you won't feel as filled up from juice since it doesn't contain any fiber. For many people, drinking a caloric beverage, such as juice, isn't as satisfying as eating the same amount of calories in food. For those who need to increase caloric intake — such as athletes, children, or teens — juice is a great choice.
Fresh juice is certainly tasty and an excellent source of many nutrients. Less stable vitamins, such as vitamin C, are not compromised in fresh juice as they may be in some processed varieties. Also, watch for added sugar in many processed juices that can increase caloric content.
In general, juice is just fine. But if fiber’s what you’re after, go for the whole fruit or veggie over the liquefied form. Happy juicing!
As they say, everything in moderation — including fiber! Eating enough fiber can have many health benefits, while too much may have consequences. By learning how much fiber you need, how much is in your food, and adjusting your diet accordingly, you’ll be able to strike a balance that’s ideal for your body (and your bowels).
Fiber is basically composed of plant-based food matter (fruits, veggies, whole grains, and legumes) that can’t be broken down by your digestive system. Whole foods contain both soluble (dissolves in water) and insoluble (does not dissolve in water) fiber. Although the recommendations below don’t distinguish between these two types of fiber, they are different and have distinct functions — soluble fiber helps to reduce cholesterol and glucose levels, and insoluble fiber helps with constipation by increasing fecal bulk.
Overall, fiber may lead to many health benefits, such as:
- Keeping you regular. Fiber decreases the risk of constipation by bulking up and softening your stool.
- Maintaining your bowel health. Fiber may prevent the development of diverticulitis and hemorrhoids. It has also been shown to reduce the symptoms of irritable bowel syndrome (IBS) in some cases.
- Lowering cholesterol and blood glucose levels. By reducing bad (LDL) cholesterol and blood glucose levels, soluble fiber also leads to a decreased risk for cardiovascular disease, coronary heart disease, and type II diabetes.
- Controlling your appetite/weight. Foods that contain fiber are typically low in fat, energy-dense, take more time to chew, keep you full for longer, and block some of the digestion of fats and proteins.
- Preventing cancer. Fiber consumption may lower the risk for colorectal cancer, but the evidence is not yet conclusive.
Curious if you are getting enough fiber in your diet? You can use either the USDA Food List or WebMD’s Fiber-o-Meter to figure out the fiber content of the foods you eat and get suggestions for high-fiber foods. Making a habit out of reading the nutrition facts on food labels will also help. Generally, women need less fiber than men, and those aged 51 years or older need less than younger individuals. The following table can give you an idea of how much fiber you need on a daily basis:
Age 50 or younger
Age 51 or older
Source: Institute of Medicine
However, having too much fiber in one's diet can cause problems. When the intake of fiber is too high, it can replace other energy and nutrients that you need in your diet. Some insoluble fibers bind certain minerals, including calcium, magnesium, phosphorous, and iron. Too much fiber can also cause abdominal discomfort, gas, and diarrhea, and block the gastrointestinal (GI) tract if you add too much fiber too fast. For some, fiber supplements may potentially cause additional, more severe side effects such as allergic reactions and asthma, gastrointestinal distress, and drug and nutrient interactions. If you feel that you might benefit from taking fiber supplements, it's best to speak with a health care provider first to make sure it’s right for you.
So, before you load up on fiber, try adding it to your diet gradually, so that your GI tract has time to adapt. You'll also want to drink lots of fluids to keep the fiber soft. Choosing a variety of soluble and insoluble fiber-rich food sources, such as fruits, vegetables, whole grain breads and cereals, and legumes (beans and peas) will ensure that not only will you get a good mix of fiber, but beneficial nutrients, too. Remember that brown rice and 100 percent whole wheat bread have more fiber than white rice or white bread. Also, eating the skins of your fruits and vegetables whenever possible can also help increase fiber intake. If you need advice or more information about incorporating fiber-rich foods into a balanced diet, consider making an appointment with a health care provider or registered dietitian.
Hope this was helpful!
Dear Breakfast Boycotter,
Your brain (and central nervous system) run on glucose — that's the fuel you need to think, walk, talk, and carry on any and all activities. Let's say that the last time you eat something at night is at 10 or 11 PM (not optimal, just an example). The following day, you don't eat breakfast but wait until about noon or so to eat — you've gone thirteen or fourteen hours with nothing in your system. Your poor brain is surely deprived — and your body has to work extra hard to break down any stored carbohydrate or turn fat or protein into a usable form for your brain to function. That's a lot to ask for when you're sitting in a classroom, trying to concentrate on reading, or doing any other work. Eating breakfast has been proven (many times) to improve concentration, problem solving ability, mental performance, memory, and mood. You will certainly be at a disadvantage if your classmates have eaten breakfast and you've gone without. On average, they will think faster and clearer, and will have better recall than you. School or work can be tough enough without this extra added pressure.
Breakfast skippers also have a harder time fitting important nutrients into their diet. Many foods eaten at breakfast contain significant amounts of vitamins C and D, calcium, iron, and fiber.
Some people believe that skipping breakfast may help them lose weight. Not so! Skipping meals often leads to overeating later in the day. Becoming overhungry often leads to a lack of control and distorted satiety signals (meaning it's hard to determine when you're full). This can result in taking in more calories than if one had an appropriate breakfast. As a matter of fact, it's easier to control one's weight by eating smaller meals and snacks more frequently.
What if there's just no time in the morning to eat breakfast? There are plenty of items you can bring along with you to school or work. Carry a resealable bag of easy-to-eat whole grain cereal, or bring a yogurt or small box of skim milk, juice, or fruit. If you just can't stomach food in the morning, try to have a little something — such as some juice — and bring along a mid-morning snack. Other good portable items include: whole grain crackers, a hard boiled egg, cottage cheese, low-fat granola bars, or even a peanut butter sandwich. Single serving hot cereals, such as oatmeal, are handy — all you have to do is add hot water, available at most cafeterias or delis.
Whatever your choice, eat something. If you think you're doing fine with no breakfast, just try changing your tune for a week —you're likely to notice a difference. You will undoubtedly perform better with some fuel in your system, and, hopefully, become a breakfast believer.
The key to getting enough protein in your diet if your a vegetarian is to eat a combination of plant-based protein. It’s good to know that proteins (which are necessary not just for muscle growth and maintenance, but also for bones, tissues, nails, hair, and metabolism) are made up of amino acids. Some are actually produced by the body itself. To get the amino acids that the body doesn't make (of which there are nine), it's necessary to eat foods that contain them. That being the case, eating those foods during the same day, rather than in the same meal, is sufficient to get what you need. Strength and aerobic training are also part of the muscle building equation as well. And along those lines, there are a few considerations to be made in order to sufficiently fuel your body and achieve the gains you’re seeking (more on that later).
There are a variety of ways to combine vegetarian foods to reach complete proteins, including:
- Beans and rice
- Peanut butter and bread
- Tofu, stir-fried vegetables, and rice
Soy protein is complete by itself. As a general rule, combining legumes with grains and nuts with grains provide you with the complete array of amino acids, as will eggs and milk products (if you are a vegetarian that consumes milk and egg products, a.k.a., a lacto-ovo vegetarian). The United States Department of Agriculture (USDA) has provided some examples on daily amounts of plant-protein sources (based on a 2,000-calorie diet):
- For vegetarians: an average of 0.6 ounces (oz.) eggs, 1.4 oz. beans and peas, 1.6 oz. soy-products and 1.9 oz. of nuts and seeds
- For vegans (folks who eschew all animal products, including eggs and milk): 1.9 oz. beans and peas, 1.4 oz. soy-products, and 2.2 oz. nuts and seeds.
Some veggie-friendly, protein-rich sources include foods such as tempeh (1 cup = 31 grams), lentils (1 cup, cooked = 18 grams), chickpeas (1 cup, cooked = 15 grams), quinoa (1 cup, cooked = 8 grams), peanut butter (2 tablespoons = 8 grams), and broccoli (1 cup, cooked = 4 grams). For additional information about vegetarian- and vegan-friendly protein sources, check out the Vegetarian Resource Group website.
Also, keep in mind that you need to strength train in order to increase muscle — just eating more protein won't cut it. If you're new to strength training, check out Weight training: Do I need to change my workout to see results?. Once you start a strength-training routine, it’s recommend that you eat an extra 500 or so calories each day in order to build muscle mass, even if you don't need to eat more protein. Also, make sure to take in enough carbohydrates. Too few carbs will mean that your muscles won't have adequate fuel, whigh might mean that may feel more tired or weak from exercise.
If you’re an athlete, you’ll likely need more protein in your diet than less physically active individuals. With that in mind, however, the regular consumption of protein in the U.S. typically exceeds the recommended daily amount for even body building needs, so most people don't need to add more protein-rich foods to their daily intake. For example, the average (non-body-building) American vegetarian gets about 14 to 18 percent of daily calories from protein (already higher than the recommended 10 percent). You might consider keeping track of what you eat over the course of a week or two to see if you need to add more protein to your diet and, if so, how much. Timing of protein intake may matter too: some experts recommend that serious athletes eat five to six small meals containing protein, fruits, vegetables, nuts, and whole grains (also drink lots of water) each day. Vegetarian athletes may need to pay special attention to make sure they are getting adequate levels vitamin B12, calcium, vitamin D, zinc, and iron (which can be more difficult when not consuming meat). For more information on diet and bodybuilding, check out Wants to build muscle mass through weight lifting and a healthy diet in the Go Ask Alice! Nutrition & Physical Activity archives.
You are quite right that some questions have been raised about whether microwaving food using plastic wrap and plastic containers is harmful to our health. Much of the focus has been on plasticizers (chemicals used to make plastic more flexible), polyvinyl chloride, and polycarbonate. More recently, bisphenol-A (BPA), primarily used in hard plastics like polycarbonate, has also been called into question.
Research suggests that plasticizers, BPA, and other chemicals may leach into food while being heated in a microwave. Plastics tend to break down and release chemicals when exposed to high temperatures, and the fear is that some plasticizers could mimic or compete with our hormones, producing a hormonal imbalance. This imbalance has been associated with the development of cancer, birth defects, and fertility difficulties. The United States Food and Drug Administration (FDA) does consider BPA to be an endocrine disruptor, meaning it can alter hormonal levels if present in high enough quantities. What is in dispute, however, is whether BPA and other chemicals leach into food in amounts high enough to cause serious health issues. Recently the FDA updated its stance on BPA to indicate moderate concern about its harmful effects during fetal development and for infants and young children. However, the FDA has not taken the same position regarding adults, who are generally less susceptible to chemicals.
While time and more testing will show whether or not heated plastics pose a health threat, limiting exposure to plastic containers with BPA, and all plastics when heated in a microwave, is a precaution some people have decided to take recently. Infants and developing embryos are especially vulnerable to potential chemical leaching, so pregnant and breastfeeding women and parents with young children might want to be particularly careful not to heat plastics in the microwave.
Here are some hints for safe microwaving:
- Choose microwave-safe plastic wrap and never let it directly contact food.
- Try using waxed or parchment paper instead of plastic wrap.
- Only use containers that have been designated as microwave-safe. Best to use microwaveable glass and ceramic cookware. Otherwise, choose those made of polyethylene plastic which is plasticizer-free.
- Never use microwave convenience food trays and containers more than once.
- Do not microwave plastic containers used for cold food storage. They often melt and warp because they are not designed to withstand the high heat of microwaving.
- Avoid microwaving food in freezer cartons and on Styrofoam trays.
Since microwaves are so common this is information everyone can use. Thanks again for the heads up!