To the reader:
I think you could try to teach your friend about enjoying healthy food. It only works if you are subtle, so work in small steps. Try inviting her over for dinner and cooking...
Wild yam (Dioscorea villosa) and Mexican yam have been marketed as alternatives to synthetic progesterone (not estrogen), which is a hormone taken by some women during menopause. These yams contain diosgenin, a plant substance that has a chemical structure similar to progesterone. In the laboratory, diosgenin can be converted to progesterone by using specific reagents and enzymes to carry out a series of chemical reactions. This transformation can only be performed in a lab — the same process does not occur in the human body. As a result, it's actually misleading for a manufacturer to term a wild yam supplement as "natural progesterone" because it is not progesterone, nor does it have any impact on a woman's hormone levels. Since diosgenin doesn't have hormonal activity itself, creams containing this substance are not effective.
In the United States, what is commonly referred to as a "yam" is actually a variety of sweet potato (ipomoea batatas). Yams are similar in shape to sweet potatoes, but are drier and starchier in taste, and are rougher and scalier in texture. Sweet potatoes are a good source of beta-carotene, vitamin C, folic acid, and some B vitamins. Predominantly grown in the Caribbean and Africa, yams are a good source of potassium, but contain no beta-carotene, and have lower levels of B vitamins, vitamin C, and folic acid than sweet potatoes. Eating sweet potatoes or yams will provide nutrients, but, as they contain neither progesterone nor estrogen, they won't affect a woman's hormonal balance.
Some of the fiber supplements (available in powder and pill forms) you are referring to are designed to help alleviate constipation, and are to be used for a limited time only. That's because if a person has chronic constipation, the cause needs to be determined. Other products can be used as supplements, as long as there are no underlying medical issues, such as chronic constipation. Two steps to determine how you use supplements are 1) read the labels carefully to find a fiber product that can be used daily, and 2) speak with your health care provider to determine if you should be taking a daily supplement.
For people who experience constipation or other irregularity with their bowel movements, some causes may be:
Luckily for you and anyone who needs more fiber, fruits and vegetables aren't the only good sources for getting more fiber into your diet. Here are some fiber boosting tips:
Part of the benefit of getting fiber through food is that you will also take in the abundant vitamins, minerals, and plant chemicals (phytochemicals) that are present — you'll get lots of important nutrients, such as vitamin A, thiamin, riboflavin, niacin, folate, vitamin C, vitamin E, chromium, copper, iron, magnesium, potassium, and zinc; also in these foods are disease fighting plant chemicals, such as anthocyanins, alpha and beta-carotene, isoflavonoids, and phytosterols, among others.
If you do take a fiber supplement, you'll want to be careful because too much fiber can bind important minerals, such as calcium, iron, and magnesium, decreasing their absorption by the body. If you have more questions about your use of supplements, it would be a great idea to ask your health care provider, who knows your medical history and can recommend the best source of fiber for you. If you're a Columbia student, you can make an appointment with Medical Services (Morningside) or the Student Health Service (CUMC).
Wishing you continued regularity,
Dear In a quandary,
Your friend definitely isn't alone, but in order for her to change her behaviors or ingrained patterns, she needs to acknowledge that a problem exists, or see a benefit from making a change. Because food and eating habits are such a personal aspect of our lives, it can be a sensitive area of discussion. To answer your first question, diets that are high in fat, sodium, and calories, and low in fruits, veggies, calcium, and other nutrients, may contribute to the development of diseases, such as heart disease, diabetes, hypertension, and osteoporosis, among others. If this factor is a concern to your friend, she may consider changing her patterns. However, if she is healthy now, the thought of developing any of these conditions in the far off future may not be motivation enough for her in the present time to change habits with which she's been comfortable.
One thing is for sure — criticizing and nagging don't work! So, what can you do? First of all, you can suggest spending time together doing some sort of activity. If you can get your friend moving, she may become interested in eating more healthfully. Try to disguise exercise into a fun pursuit. Some ideas include:
Another tact you can try is to determine something that is important to her, and show her that eating better can help improve the matter. While many people aren't motivated by diseases they can't relate to or that seem intangible, immediate concerns can hold more relevance. For example, skin problems, low energy levels, or stomach discomfort can promote a greater incentive or inclination to change. If she complains about any of these conditions, some appropriate suggestions could include drinking more water than diet soda, substituting a juicy piece of fruit for the chips, or heading over to an enticing salad bar rather than making a quick trip for fast food. Considering and implementing any changes or new patterns are only part of the challenge; maintenance is also key, and can be easier to follow-through when done together with a peer than by one's self. Your can demonstrate your support by bringing over some farm fresh apples, cooking a healthy meal together, going to lunch together at an eatery where healthy choices are available, walking together regularly during lunch breaks, etc.
Remember, gentle suggestions are better received than harsh criticism. Advice that begins with "You should..." may fall on deaf ears. Instead you can try to initiate a discussion, saying something like, "You know, I just read an article that said drinking water is important for keeping skin healthy... and I'm drinking more water as a result." Having a conversation about this subject may get your friend to think, and perhaps try, to take steps leading to healthier patterns of eating and activity. Then again, she may decide not to pursue anything at this time. If this is the case, you can express your concern to your friend, and let her know that if she would ever like to pursue healthier eating habits you are ready to support her. In the mean time, remember why you're friends in the first place and enjoy your time together!
To the reader:
I think you could try to teach your friend about enjoying healthy food. It only works if you are subtle, so work in small steps. Try inviting her over for dinner and cooking...
To the reader:
I think you could try to teach your friend about enjoying healthy food. It only works if you are subtle, so work in small steps. Try inviting her over for dinner and cooking a healthier version of pizza or lasagne or some other food she might recogize. Or take her out for a healthy but filling meal at a good quality restaurant (Italian is often good for this). By doing this the aim is to lead by example: show her that healthy food tastes great, fills you up and can contribute to a fun meal, as well as being good for you. Then she will see that living a healthy lifestyle needn't be torture, in fact it is something that a lot of people (chefs, gourmet food lovers, etc.) deliberately seek! Good Luck!
Put down your fork and raise your glass. Here's to feasting sensibly, moderately, and contentedly:
Before the meal:
As you’re deciding what to put on your plate:
Some food for thought while you chew:
Actions to take after the holiday repast:
Enjoying the holiday season doesn't have to mean overindulging in holiday cheer. Being mindful of your eating (and drinking) doesn't have to be limiting; it can actually enhance your experience.
Dear Baffled Over Butter,
You may be baffled over butter, but it sounds like you've got a good grip on chemistry! Some of the margarines sold in stores today are still made from oil that has been infused with hydrogen atoms, firming it up into a semi-hard or solid form at room temperature. This process is known as hydrogenation, and it allows the margarine to contain less saturated fat than butter. Unfortunately, hydrogenation also forms something known as trans fat, which actually does more damage to your body than saturated fat. (Both butter and margarine end up containing the same amount of total fat.)
Margarines made from hydrogenated oil usually appear in a solid stick form, similar to how butter is sold. Other kinds of margarines on the market today are made from non-hydrogenated oil, making them softer in texture and lower in calories, saturated fat, trans fat, and total fat. These soft margarines, which are commonly packaged in tubs and known as "soft-tub margarines," replace the hydrogenation process with small amounts of modified palm kernel and palm oil in order to make it softer and easier to spread.
Unlike margarine, butter isn't made from vegetable oil. Instead, butter is prepared from cream, contains saturated fat, and, because it's made from an animal source, also has cholesterol. Both saturated fat and cholesterol raise unhealthy cholesterol or LDL (low-density lipoprotein). Margarine is manufactured from vegetable oils, such as corn, soybean, or safflower oil, among others. Since margarine is based on plant sources, it doesn't contain cholesterol.
Because margarines don't contain cholesterol and are now made without trans fat, the American Heart Association recommends that soft margarine can be used instead of butter in recipes. Choose a margarine that contains less than two grams of saturated fat per tablespoon, no trans fat, and has liquid vegetable oil as the first ingredient.
The "good fat/bad fat" you've heard about refers to fat's potential to cause disease. All fats have the same amount of calories, but they vary in their chemical compositions and effects on health. Fats are made of chains of carbon and hydrogen atoms. The saturation refers to whether all the available spaces on the carbon chain are bonded to hydrogen atoms, or if there are any hydrogen atoms missing. The three forms of fat found in nature are:
These fats have all of their carbon atoms filled (saturated) with hydrogen. Saturated fat is primarily found in high-fat cuts of meat, poultry with the skin, whole and 2 percent dairy products, butter, cheese, and tropical oils: coconut, palm, and palm kernel. Our body needs a small amount (about 20 grams) of saturated fat each day, but the typical American diet usually exceeds that amount. Too much saturated fat may cause a person's bad cholesterol (LDL) to rise and may also increase the risk of developing certain types of cancer. You can look for the amount of saturated fats in a serving of food on the nutrition label, under the heading "Saturated Fat" below the larger heading of "Total Fat."
These fats have one space missing a hydrogen atom, instead containing a double bond between two adjacent carbon atoms. Monounsaturated fat is found in olive oil, canola oil, peanut oil, and in most nuts and nut butters. This type of fat does not cause cholesterol to increase. When a person substitutes monounsaturated fat for saturated fat, it helps to lower the bad cholesterol and protects the good cholesterol (HDL) from going down. The amount of monosaturated fats (and polyunsaturated fats, see below) is not listed separately on the food label, but it can be calculated by subtracting the saturated and trans fats (see below) from the total fat.
These fats have more than one hydrogen atom missing in the carbon chain and therefore contain more than one double bond. The two major categories of polyunsaturated fats are Omega-3 and Omega-6 fatty acids. Omega-3 means there is a double bond in the third space from the end of the carbon chain. These fats are extremely healthful in that they protect against sudden death from heart attack. They can also help people lower their triglycerides. Omega-3s are used by the body to produce hormone-like substances with anti-inflammatory effects. The best sources of Omega-3s are fatty fish, such as salmon, sardines, mackerel, herring, and rainbow trout, among others. Canola oil, walnuts, and flaxseed also contain some Omega-3s.
Omega-6 fats have a double bond in the sixth space from the end of the carbon chain. These fats are found in oils such as corn, soybean, cottonseed, sunflower, and safflower. Omega-6 fatty acids are used in hormone-like substances that promote inflammation. Replacing saturated fats with Omega-6 fats may reduce levels of total, bad, and good cholesterol. Many health experts suggest that the ratio of Omega-6 to Omega-3 fatty acids should be 4:1 for optimal health. (Most Americans get 14 - 20:1 — a lot more than needed!) These fats are not listed separately on the food label.
The other type of fat that is found in food, but isn't natural, is:
Hydrogenated Fats (also known as Trans Fats)
These are manufactured by adding hydrogen to a polyunsaturated fat, making it solid at room temperature. However, instead of having the qualities of a polyunsaturated fat, it takes on some of the traits of a saturated fat. In the past, trans fats were widely used in foods as a replacement for saturated fats. Then it was discovered that trans fat was even worse than saturated fat in terms of its effects on health. In addition to raising LDL cholesterol, as saturated fat does, it also decreases the level of HDL cholesterol.
Many companies have found ways to eliminate trans fats from their products and all companies are now required to list the amount of trans fats on the nutrition label. Be aware that products containing half a gram or less of trans fat per serving are allowed to report zero grams of trans fat on the nutrition label. The best way to check for trans fat is to read the ingredients label; if you see the words "partially hydrogenated" or "hydrogenated" in front the word oil, the food probably has a small amount of trans fat. This doesn't mean you shouldn't eat the food, but you should limit the amount you eat — a little can add up to a lot. Some foods contain small amounts of naturally-occurring trans fats, but these fats, unlike man-made trans fats, probably do not increase the risk of heart disease and other conditions. Moreover, some manufacturers are now replacing trans fat with saturated fats, so be sure to check the nutrition label to keep your total intake of unhealthy fats in check.
Although too much can have negative results, fats are certainly required for good health. Here are some of the positives — fats:
Bear in mind, though, that the calories from fat can add up fast since they are more concentrated in fat than in protein or carbohydrate. Also, as mentioned above, consuming too much saturated and trans fat may result in negative health consequences in some people. The secret is not to stay to one extreme or another; try to be flexible in your fat intake. What does that mean? Balance your meals and snacks. If you find you have a high fat meal (especially high in saturated fat), make the next one lower in fat. Or, if you choose a higher fat food, complement it with a lower fat one. We don't have to live an "all or nothing" philosophy when it comes to fat.
Your skepticism is warranted, considering the label "all natural" does not have one, standard definition or imply “risk-free.” In order to be approved by the Food and Drug Administration (FDA), sweeteners marketed as “Stevia” may contain only one highly refined component of the stevia rebaudiana plant, called Rebaudioside A. Due to potential health risks, no other components of the stevia plant have been approved by the FDA as food additives or sugar substitutes. Non-food products (often labeled as dietary supplements) containing less refined stevia ingredients are available, and some are even deemed “safe for consumption.” However, the FDA recommends waiting for more conclusive research before consuming large quantities of supplements containing stevia-derived ingredients other than Rebaudioside A.
In addition to Rebaudioside A, most FDA-approved stevia sweetener products also contain fructooligosaccharide, a sugar extracted from non-stevia fruit sources. Some studies show that fructooligosaccharide may actually promote the growth of healthy bacteria, relieve constipation, regulate lipid metabolism, and promote immune system health. Additionally, these sugars may be less detrimental to oral health than table sugar, and may help to treat glucose intolerance. Rebaudioside A and fructooligosaccharide are both approved by the FDA as food additives.
Although some empirical studies show no negative side effects of consuming unrefined stevia plant products and deem them “relatively safe” and “nontoxic,” the FDA has expressed safety concerns related to these products. Such concerns include negative effects on the reproductive, cardiovascular, and renal systems as well as blood sugar regulation issues. Other concerns include the stevia plant’s potential ability to damage genetic material, but independent scientific studies have determined that this type of gene damage is only possible in a laboratory environment, not in the human body. Stevia proponents also cite the plant’s inability to be digested (hence, the reason why it is calorie-free) as evidence that it simply passes through the body without causing any damage.
When it comes to sweeteners and food additives, Rebaudioside A is the only FDA-approved component of the stevia plant. Considering the inconclusiveness of existing research, unrefined stevia supplements and other non-food products should be consumed cautiously. Good work keeping yourself informed before you ingest!
Dear Out to lunch bunch,
Restaurants, fast food joints, and delis are often convenient for a quick meal and provide a welcome opportunity to socialize. However, there are a couple of ways in which eating out may be less than favorable for your health. The specific effects will vary depending on the type of restaurants and dishes you choose, which is why educating yourself is a great place to start. Here are some reasons why eating out can make it hard to maintain a healthy and balanced diet:
The type of restaurants you frequent also matters as far as health risks are concerned. For those who are into the burgers-and-fries joints, research shows an increased risk of obesity and type 2 diabetes, as well as an overall lowered intake of key nutrients. For those who prefer fast-food restaurants that primarily serve sandwiches and subs, there tends to be increased intake of fat and sodium. (However, weight gain has not been associated with consumption of foods from these establishments). Finally, for those heading off to full-service restaurants, studies show that even though you’re probably consuming adequate amounts of fruits and veggies, you’re exposed to high sodium content, which increases your risk of developing high blood pressure.
If you’re ever interested in trying your hand in the kitchen to avoid some of these health risks of eating out, you can read No time to cook or visit ChooseMyPlate.gov for some ideas on quick and nutritionally-balanced meals you can make. Additionally, here are a couple of ideas on ways to make more healthful choices when you do go out:
List adapted from choosemyplate.gov.
Finally, whether you choose to eat out regularly or just for the occasional treat, a strategy known as “mindful eating” might be a handy tool. Mindful eating involves actively making yourself aware of why and how you are consuming food and the way your body feels when eating. Are you consciously aware of when you’ve eaten your fill, or is eating more of an automatic reflex? Asking yourself questions like this may help you make more balanced menu choices and avoid the some of negative effects of eating out, although further research on mindful eating is still emerging.
There’s certainly a lot of information to digest on the effects of eating out! But whether you’re eating on the run or whipping up a meal at home, maintaining a balanced diet with plenty of fruits, vegetables, and whole grains is key. As they say, everything in moderation!
Food additives help maintain the freshness and shelf life of such food products because without them, they would spoil quickly due to exposure to air, moisture, bacteria, or mold. Either natural or synthetic substances may be added to avoid or delay these problems.
Food additives may be used in a variety of ways, including:
Preservatives are centuries old. Since ancient times, salt has been used to cure meats and fish, and sugar has been added to fruits to conserve them. Herbs, spices, and vinegar have also served as preservatives. Today, the U.S. Food and Drug Administration (FDA) regulates food additives and preservatives. Granted, mistakes have been made, which have resulted in taking some food additives and preservatives off the market. That is because at the time of approval, prevailing testing methods proved the substances as safe. As science continued to evolve and testing methods improved, changes were made. Technology has also assisted in the approval process as it has become more sophisticated over the years as well. In addition, Food Additive Laws are reviewed and revised according to advancing scientific research.
Food additives in and of themselves don't connote something "bad." For example, ascorbic acid refers to vitamin C and alpha-tocopherol is actually vitamin E. Some uses and examples of food additives are:
For a complete guide to information about food additives, including the approval process, click onto the FDA web site.
Another useful link describing many food additives and their uses can be found on the Center for Science in the Public Interest web site.
Hope this provides you with lots of useful information,
Dear Student & Parent,
Bravo to eating breakfast! It's fairly well known as this point that a healthy breakfast is a great way to start each day — especially when it's made from scratch. Taking into consideration that, just sometimes, younger people are a little picky about what they'll eat, not to mention the energy it can take a groggy chef to whip up something in the A.M., here are a few easy, interesting, and nutritious breakfast recipes:
Creamy Apple-Cinnamon Oatmeal (makes two servings):
2 c. skim milk
1 c. rolled oats
1 T. Brown sugar
1 T. Maple syrup
1 apple — peeled, cored, and chopped into cubes
Berry Parfaits (makes two servings):
2 containers of yogurt (vanilla, lemon, or peach)
2 c. mixed berries: strawberries, raspberries, blueberries, and/or blackberries
1 c. low fat granola
Egg Scramblers (one serving):
1 or 2 eggs
1 toasted whole wheat pita or toasted English muffin
Optional item(s): mushrooms, peppers, grated cheese, chopped tomatoes, onions, salsa, or whatever else you like!
Banana Smoothie (makes one serving):
1 banana cut into 1-inch chunks (works great if already frozen)
½ c. yogurt
½ c. milk or soy milk
2 T. honey or jam
¼ t. vanilla extract
You can freeze this beverage overnight, then toss it into a blender, and pour it back in the plastic cup you froze it in. If you run out of time in the morning, you can bring your smoothie with you on the way to school.
Regardless of what you make, consider involving your breakfast companion in both the decision process and making the breakfast. This way you can both enjoy some time together and a nutrient-filled morning. Eat up!
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