By Ken Adams, M.D.
Vitamin B1 (Thiamine) Sources and Physiologic Functions
Pork, whole grains, and legumes are the richest sources of thiamine. Outer layers of seeds are particularly rich in this vitamin.
Continue Reading » Thiamine (Vitamin B1) How, Why and When to Supplement
Poultry, fish, liver, and eggs are good sources of this vitamin; meat and milk contain lesser amounts. Pyridoxine in animal sources is 96% bioavailable. Vitamin B6 can be made by intestinal bacteria in healthy persons. Plant foods such as legumes, peanuts, potatoes, yeast, bananas, corn, cabbage, yams, prunes, watermelon, and avocados also contain this vitamin.
Continue Reading » Vitamin B6 (Pyridoxine) When, How, and Why to Supplement
Sources: Liver is an excellent source of riboflavin. Milk, cheese, egg whites, legumes, peanuts, fish, meats, broccoli, spinach, and fortified grains are good sources. The UV component of sunlight destroys Riboflavin. Hence, milk should be protected in opaque cartons from bright light during storage. Proteins, dextrins, and starch decrease the need for this vitamin.
Continue Reading » Vitamin B2 (Riboflavin)
By Ken Adams, M.D. and Scott E. Conard, M.D.
Niacin (Vitamin B-3):
Sources and Physiologic Functions Sources: Niacin is found in unrefined and enriched grain and cereal, milk, and lean meats, especially liver. Yeast, poultry, salt water fish, nuts, legumes, coffee, tea, dairy products, and potatoes are good sources of Niacin.
Continue Reading » Niacin (Vitamin B3) When, How, and Why to Supplement
Background:The study examined the effects of dietary fasting on physical balance among young healthy women.
Methods:This study undertaken involving 22 young healthy women (age = 22 ± 1.5) using a within subject counterbalanced 2-week crossover study design. Participants were asked to refrain from consuming any food or beverage for 12 hours prior to the fasting trial and to maintain their regular diet for the non-fasting trial. Measures included: a background questionnaire, 24-hour dietary recall, and functional reach and timed single-limb stances.
Results: Fasting resulted in significant declines in functional reach (p < 0.01), and ability to balance in a single limb stance with eyes open, on both the dominant and non-dominant legs (p < 0.01 and p < 0.01, respectively), and with eyes closed on the dominant leg (p < 0.01).
Conclusions: The findings have implications for athletic performance in younger individuals as well as emphasizing the need for health education for young women to avoid skipping meals.
Continue Reading » The Effects of Dietary Fasting on Physical Balance Among Healthy Young Women
Dietary fiber and whole grains contain a unique blend of bioactive components including resistant starches, vitamins, minerals, phytochemicals and antioxidants. As a result, research regarding their potential health benefits has received considerable attention in the last several decades. Epidemiological and clinical studies demonstrate that intake of dietary fiber and whole grain is inversely related to obesity, type two diabetes, cancer and cardiovascular disease (CVD). Defining dietary fiber is a divergent process and is dependent on both nutrition and analytical concepts. The most common and accepted definition is based on nutritional physiology. Generally speaking, dietary fiber is the edible parts of plants, or similar carbohydrates, that are resistant to digestion and absorption in the small intestine. Dietary fiber can be separated into many different fractions. Recent research has begun to isolate these components and determine if increasing their levels in a diet is beneficial to human health. These fractions include arabinoxylan, inulin, pectin, bran, cellulose, ß-glucan and resistant starch. The study of these components may give us a better understanding of how and why dietary fiber may decrease the risk for certain diseases. The mechanisms behind the reported effects of dietary fiber on metabolic health are not well established. It is speculated to be a result of changes in intestinal viscosity, nutrient absorption, rate of passage, production of short chain fatty acids and production of gut hormones. Given the inconsistencies reported between studies this review will examine the most up to date data concerning dietary fiber and its effects on metabolic health.
Continue Reading » Effects of Dietary Fiber and Its Components on Metabolic Health
Vitamin Enhanced Waters and Fruit Juice Beverages Analyzed for Polyphenol Antioxidant Capacity and Antioxidants per Calorie
Polyphenols have become a recent interest to health conscious individuals. As a result, beverages containing high concentrations of polyphenols are becoming increasingly popular. This is due to the health benefits that accompany polyphenol consumption, derived from their antioxidant properties . Polyphenols have been found to inhibit reactive oxygen species formation and protect against coronary heart disease [2,3]. Polyphenols have also been reported to potentially inhibit the development of certain types of cancer, such as breast cancer, and slow tumor growth [4-8]. The fact that these polyphenols can help prevent chronic disease has prompted beverage manufacturers to produce drinks that boast antioxidant content and consumers may look to these beverages for consumption of antioxidants and nutrients. These include vitamin enhanced waters (VEWs) and a variety of fruit and berry juices.
Photodamage is known to occur in skin with exposure to sunlight, specifically ultraviolet (UV) radiation. Such damage includes inflammation, oxidative stress, breakdown of the extracellular matrix, and development of cancer in the skin. Sun exposure is considered to be one of the most important risk factors for both nonmelanoma and melanoma skin cancers. Many phytonutrients have shown promise as photoprotectants in clinical, animal and cell culture studies. In part, the actions of these phytonutrients are thought to be through their actions as antioxidants. In regard to skin health, phytonutrients of interest include vitamin E, certain flavonoids, and the carotenoids, ß-carotene, lycopene and lutein.
Continue Reading » The Role of Phytonutrients Like Vitamin E and Beta-Carotene in Skin Health
In 111 scientific articles on nonalcoholic beverages, articles with all industry funding were more than 7 times more likely to have favorable conclusions compared with articles with no industry funding.
Much of the money available for doing medical research comes from companies, as opposed to government agencies or charities. There is some evidence that when a research study is sponsored by an organization that has a financial interest in the outcome, the study is more likely to produce results that favor the funder (this is called “sponsorship bias”). This phenomenon is worrying, because if our knowledge about effectiveness and safety of medicines is based on biased findings, patients could suffer. However, it is not clear whether sponsorship bias extends beyond research into drugs, but also affects other types of research that is in the public interest. For example, research into the health benefits, or otherwise, of different types of food and drink may affect government guidelines, regulations, and the behavior patterns of members of the public. Were sponsorship bias also to exist in this area of research, the health of the wider public could be affected.
Continue Reading » Does Industry Sponsorship of Nutrition Research Influence Study Outcomes?
Industrial support of biomedical research may bias scientific conclusions, as demonstrated by recent analyses of pharmaceutical studies. However, this issue has not been systematically examined in the area of nutrition research. The purpose of this study is to characterize financial sponsorship of scientific articles addressing the health effects of three commonly consumed beverages, and to determine how sponsorship affects published conclusions.
In industrialised countries, most people regulate their energy expenditure poorly. Individual energy expenditure may differ up to 20-fold between resting conditions and high physical activity, but such differences have until now been weakly correlated to energy intake at subsequent meals . Frequent episodes of positive energy balance can lead to insulin resistance, overweight, obesity, diabetes, and heart disease [1, 2]. Dietary regimes that attempt to restrain eating have been only marginally successful [3, 4] and the feasibility of self-regulation of energy intake regimes has been questioned . A key reason for this lack of success may be that most dietary methods rely on weekly or monthly measurements of weight. These measurements provide no immediate feedback to dieters, who usually ingest food at least three times daily.
Fructose intake has recently received considerable media attention, most of which has been negative. The assertion has been that dietary fructose is less satiating and more lipogenic than other sugars. However, no fully relevant data have been presented to account for a direct link between dietary fructose intake and health risk markers such as obesity, triglyceride accumulation and insulin resistance in humans. First: a re-evaluation of published epidemiological studies concerning the consumption of dietary fructose or mainly high fructose corn syrup shows that most of such studies have been cross-sectional or based on passive inaccurate surveillance, especially in children and adolescents, and thus have not established direct causal links. Second: research evidence of the short or acute term satiating power or increasing food intake after fructose consumption as compared to that resulting from normal patterns of sugar consumption, such as sucrose, remains inconclusive. Third: the results of longer-term intervention studies depend mainly on the type of sugar used for comparison. Typically aspartame, glucose, or sucrose is used and no negative effects are found when sucrose is used as a control group.
Continue Reading » Fructose Consumption: What are the Real Health Implications?
Bone health is an important issue in aging. Calcium and vitamin D currently have the most focus in published research on nutrition and bone health in aging, although evidence from published research is not conclusive. A systematic review was conducted to determine the impact of dietary and supplemental interventions focused on calcium and vitamin D over the past 10 years. Using key words to search, and search limits (aging population, English), 62 papers were found related to diet, nutrition, and bone; and 157 were found related to calcium and bone. Our review found a positive effect on bone health for supplements; food-based interventions; and educational strategies. Although there may be a publishing bias related to non-significant findings not being published, our results suggest the effectiveness of food based and educational interventions with less economic impact to the individual, as well as less risk of physiological side effects occurring.
Continue Reading » Bone Health and Nutrition in Aging: Calcium and Vitamin D
The Effect of Ingested Macronutrients on Post-Meal (Postprandial) Ghrelin Response: A Critical Review
Ghrelin is a powerful orexigenic gut hormone with growth hormone releasing activity. It plays a pivotal role for long-term energy balance and short-term food intake. It is also recognized as a potent signal for meal initiation. Ghrelin levels rise sharply before feeding onset, and are strongly suppressed by food ingestion. Postprandial ghrelin response is totally macronutrient specific in normal weight subjects, but is rather independent of macronutrient composition in obese. In rodents and lean individuals, isoenergetic meals of different macronutrient content suppress ghrelin to a variable extent. Carbohydrate appears to be the most effective macronutrient for ghrelin suppression, because of its rapid absorption and insulin-secreting effect. Protein induces prolonged ghrelin suppression and is considered to be the most satiating macronutrient. Fat, on the other hand, exhibits rather weak and insufficient ghrelin-suppressing capacity. The principal mediators involved in meal-induced ghrelin regulation are glucose, insulin, gastrointestinal hormones released in the postabsorptive phase, vagal activity, gastric emptying rate, and postprandial alterations in intestinal osmolarity.
A recent investigation on protein drinks has been causing waves of concern or even alarm to ripple through the fitness and bodybuilding world. Supplement companies are up in arms and people are wondering whether they should stop drinking protein shakes after the magazine said they tested 15 protein drinks for heavy metals (arsenic, cadmium, lead and mercury) and 3 of them came up above the proposed safe limits…
Continue Reading » Heavy Metals Found In Protein Shakes: Should You Stop Drinking Them?
Page Tree Navigation
- 7 Artificial or Non-nutritive Sweeteners Approved For Use in the U.S.
- Calories from Lipids (Fats), Carbohydrate, and Protein
- Sugar glossary a quick reference to simple sugars
- Changes in Intakes of Total and Added Sugar and their Contribution to Energy Intake in the U.S.
- Dietary Fiber
- Fructose Consumption: What are the Real Health Implications?
- Consuming Whey Protein and Poor Appetite in Strength Training
- Eat This, Not That! Site Cooking the Protein Numbers with Six Foods Compared to Eggs
Essential Fatty Acids (EFA's)
Omega-3 Fatty Acids
- Are all Omega-3 Fatty Acids Created equal?
- Are Omega-3 Fatty Acids Like Fish Oil Effective for Treating Asthma?
- DHA: Docosahexaenoic Acid
- Docosahexaenoic Acid (DHA): An Ancient Nutrient for the Modern Human Brain
- Epa Eicosapentaenoic Acid
- Fish Oil
- Omega 3 Fatty Acids And Inflammation
- Omega-3 Index and Sudden Cardiac Death
- Omega-3 Fatty Acids
- Food Oil Fatty Acid Content List: Saturated, Monounsaturated and Polyunsaturated
- Grass Fed Versus Grain Fed Beef: Fatty Acid Profiles, Antioxidant Content and Taste
- The Biological Activities of Phenolics in Virgin Olive Oil
- Trans Fatty Acids (Trans Fats)
- Fish, Mercury, Selenium and Cardiovascular Risk: Does the Danger of Mercury Outweigh the Benefits of Fish Intake?
- Food Allergies
- Food And Drug Administration (FDA)
- Acesulfame-K (Acesulfame Potassium)
- Acetic Acid
- Aconitic Acid
- All-purpose Flour
- Anticaking Agents (Free-Flow Agents)
- Dietetic (Foods)
- FD&C Blue No. 1: Brilliant Blue FCF Food Dye
- FD&C Yellow No. 6: Sunset Yellow Food Dye
- Guar Gum
- Gum Arabic (Arabic, Acacia Gum)
- Synthetic Versus Natural Food Colorings: Answers to Many Common Questions
- Food Labels
- Food Safety Articles and Information
- Health Benefits Of Nut Consumption
- Milk and Dairy
- Organic Food: The Real Story
- Ten Food Myths: The Truth Revealed!
- The Dangers of Raw Milk and the Claims of its Magical Healing Powers
- The Difference Between Sea Salt and Ordinary Table Salt: Is Sea Salt Really Healthier?
- The Origins of Lactase Persistence in Europe
- Wheat Versus Whole Wheat
- How Do We Know What Chemicals Are Harmful?
- Mistaken Reasons that People Take Vitamin and Mineral Supplements
- Most Diseases are Caused by Poor Nutrition - Food Quackery Myth Examined
- Natural and Processed Food, Nutritionism and Pollanisms
- Nutrient Timing Articles
- Nutrition is Not a Top Ten Proposition and the Lycopene Bust
- Nutrition Junk Science: Red Flags That Help You Spot It!
- Nutrition Research: Industry Sponsorhip of Nutrition Research
- "Processed" Food Has Become A Dirty Word
- Amino Acids
- Casein or Whey?
- Dietary Guidelines should reflect new understandings about adult protein needs
- Dietary Protein and Kidney Function
- Greek Yogurt: Twice The Protein
- Protein And Exercise
- Protein Powders are Synthetic Poison!
- Whey Protein
- Raw Food Claim: Your Body Has a Limited Amount of Enzymes to Digest Foods
- Splenda Kills Healthy Intestinal Bacteria?
- Colloidal Silver And Other Silver Products
- Can Creatine Supplementation Help Older Adults?
- Creatine And Exercise
- Creatine Ethyl Ester Supplementation Effects with Heavy Resistance Training
- The Creatine Transporter: A Brief Review of Creatine Supplementation in Humans and Animals
- Fatal New Trend in Performance Enhancement? A Cautionary Note on Nitrite
- Forbes Article Says Protein Supplements Being Sued for Failing to Meet Protein Content Claims
- I'm Lactose Intolerant, Can I Still Use Whey Protein?
- Metabolites, Constituents And Extracts
- Pharmacists and Dietary Supplements
- Phospholipids and Sports Performance
- Supplement Rationale, Behavour, and Expertise
- Tryptophan Supplements: Do They Work and Are They Dangerous?
- Warning: The Hidden Risks of Erectile Dysfunction and Sexual Stimulant Dietary Supplement 'Treatments' Sold Online
- What is Acesulfame Potassium Doing in Whey Protein Products?
- Surprising New Nutrition Finding: Nutrition Articles on News Sites Suck
- The Aspartame Myth-information Campaign: You Can Live Without It
- The Poisonous Apple: A Chemical Cocktail
- The Role Of Soy In Vegetarian Diets
- Top Vitamin C Containing Fruits
- Folic Acid Fortification: History, Effect, Concerns, and Future Directions
- Niacin (Vitamin B3) When, How, and Why to Supplement
- Thiamine (Vitamin B1) How, Why and When to Supplement
- Vitamin B12
- Vitamin B2 (Riboflavin)
- Vitamin B6
- The Role of Phytonutrients Like Vitamin E and Beta-Carotene in Skin Health
- Vitamin A and Beta Carotene: What, How, When, Why to Supplement
- Vitamin C
- Vitamin D
- Vitamin E
- Vitamin E and C for Strength and Bodybuilding: Should You Take Them for Exercise Induced Oxidative Stress?
- Vitamins and Prostate Cancer Risk
- Vitamins and Sports Performance
- B Vitamins
- What are Coenzymes?
- What Are Sugar Alcohols?
- What are the Major Elements and Molecules in the Human Body?
- What is Denaturing Of Proteins and Why Do Some People Make a Big Deal of It?
- What Is Nutrient Density? What is a Nutrient Dense Food? Plus, What are Empty Calories?
- What is Sweet Dairy Whey and Can I Use it as a Whey Protein Supplement?
- When it comes to Education About Food, We Are Full of It: Fear-Laden and Romanticized Messages Go Hand in Hand
- Whey Protein Processing, Terms and Definitions: Countering the Misconceptions About Whey Protein Including 'Raw' Whey