Intestinal Health May Affect Your Ability to Lose Weight
Recent studies have demonstrated that the makeup of your intestinal flora (bacteria in your gut and intestines) can have an impact on your weight, and your ability to gain or lose weight.
Research also suggests that as much as 20 percent of the weight loss achieved from gastric bypass, a popular weight loss surgery, is actually due to shifts in the balance of bacteria in your digestive tract.
To investigate the potential link between gastric bypass surgery and changes in gut flora, fattened-up mice were divided into two groups. The test group underwent gastric bypass surgery while the control group received sham surgery. After the sham surgery, the controls were further divided into two groups: One received a fatty diet; the other a weight-loss diet.
In the group who received the bypass surgery the microbial populations quickly changed following surgery, and the mice lost weight. In the control group, the gut flora didn’t change much, regardless of their diet.
Previous research has also shown that lean people tend to have higher amounts of various healthy bacteria compared to obese people. For example, one 2011 study found that daily intake of a specific form of lactic acid bacteria could help prevent obesity and reduce low-level inflammation.
In this study, rats given the bacterium while in utero through adulthood put on significantly less weight than the control group, even though both groups of rats ate a similar high-calorie diet. They also had lower levels of minor inflammation, which has been associated with obesity.
Similarly, gut bacteria have also been shown to impact weight in human babies. One study found babies with high numbers of bifidobacteria and low numbers of Staphylococcus aureus — appeared to be protected from excess weight gain.
This may be one reason why breast-fed babies have a lower risk of obesity, as bifidobacteria flourish in the gut of breast-fed babies. Probiotics also appear beneficial in helping women lose weight after childbirth when taken from the first trimester through breastfeeding.
Two other studies found that obese individuals had about 20 percent more of a family of bacteria known as firmicutes, and almost 90 percent less of a bacteria called bacteroidetes than lean people. Firmicutes help your body to extract calories from complex sugars and deposit those calories in fat. When these microbes were transplanted into normal-weight mice, those mice started to gain twice as much fat. This is one explanation for how the microflora in your gut may affect your weight.
Another study from 2010 showed that obese people were able to reduce their abdominal fat by nearly five percent, and their subcutaneous fat by over three percent, just by drinking a probiotic-rich fermented milk beverage for 12 weeks. Given that the control group experienced no significant fat reductions at all during the study period, this is one more reason to consider probiotics.
Probiotics have also been found to benefit metabolic syndrome, which often accompanies obesity. This makes sense since both are caused by a diet high in sugars, which leads to insulin resistance, fuels the growth of unhealthy bacteria, and packs on excess weight.
Understanding Gluten Intolerance
Gluten is a protein in grass-type grains such as wheat, barley and rye. It gives food a stretchiness and stickiness and it’s in much of what Americans eat. It’s in the obvious things like bread, pasta and crackers but it’s also in sauces, medications, lipstick, imitation crabmeat and other items not normally associated with grains. Unfortunately more and more people are finding their body might not tolerate gluten products very well. Gluten intolerance can run a whole range in severity from minor symptoms when a person eats grain-based foods to Celiac disease, an autoimmune disorder that prevents the gastrointestinal system from properly absorbing nutrients.
Normally, people can tolerate these proteins, but if you have Celiac disease they cause the gaps between the cells in the small intestine to open too wide and allow toxins and gluten fragments into the bloodstream. These particles are seen as alien invaders by the body, and are therefore attacked.
The normal small intestine features small hair like projections along its length known as villi which increase the surface area and therefore assist in the absorption of the nutrients that the body needs to stay healthy. The autoimmune response causes so much damage to these villi (in some cases flattening them entirely) that they are no longer effective. Changing over to a gluten free diet will allow your body to repair itself, and your health will improve tremendously.
Gluten intolerance can be diagnosed with a blood test, antibody screening or biopsy. Many people simply take gluten out of their diet for a month to see if it alleviates symptoms.
Gluten Free Supplements
The following is a list of some of the gluten free supplements available at Performance Nutrition: Forzagen Protein, Intek Protein, all Irwin Naturals products, MRM Proteins, NOW Foods proteins, most NOW Foods vitamins and supplements.
What is Lactose and What Does it Mean to be Lactose Intolerant
Lactose is the natural sugar found in milk and milk products. Approximately 30 to 50 million Americans are lactose intolerant according to the National Institute of Diabetes and Digestive and Kidney Diseases. This condition is caused by a deficiency of an enzyme called lactase. Prior to absorption into the bloodstream, milk sugars are broken down into simple sugars by the enzyme lactase which is naturally produced in the small intestine.
Lactose is present in two large food categories— dairy products, and as a food additive in dairy and non-dairy products. During cheese manufacturing, a curdling process is initiated to separate the curd from the whey. After this process, lactose is found in the water based portion along with whey and casein. A process called ultra-filtration makes it possible to remove lactose as whey protein is filtered to higher protein concentrations.
When it comes to whey protein powders, there is always a slight chance that there are low levels of lactose in whey protein concentrate, however it is relatively safe to determine that whey protein isolates are free of lactose as they have been concentrated to the highest possible level of protein and were processed with the highest degree of filtration for effective lactose removal. For those with high sensitivities to lactose, it is best to stay away from protein blends that may include milk proteins and various types of whey that have not been filtered to the same degree as whey protein concentrate 80% and whey protein isolate 90%. A digestive enzyme product that contains the enzyme lactase can also be used to help breakdown and digest products with lactose more effectively.
Understanding the Paleo Diet
The Caveman Diet, also called the Paleolithic (or Paleo), Stone Age, and Warrior diet, is a plan based on eating plants and wild animals similar to what cavemen are presumed to have eaten around 10,000 years ago.
Why turn back the hands of time and eat that way? The premise is that our bodies are genetically programmed to eat like our Paleolithic ancestors.
Proponents claim it’s the biologically appropriate diet that suits us best, with the proper balance of nutrients to promote health and reduce the incidence of chronic diseases.
The Paleo Diet is based upon eating wholesome, contemporary foods from the food groups our hunter-gatherer ancestors would have thrived on during the Paleolithic era, the time period from about 2.6 million years ago to the beginning of the agricultural revolution, about 10,000 years ago. These foods include fresh meats (preferably grass-produced or free-ranging beef, pork, lamb, poultry, and game meat, if you can get it), fish, seafood, fresh fruits, vegetables, seeds, nuts, and healthful oils (olive, coconut, avocado, macadamia, walnut and flaxseed). Dairy products, cereal grains, legumes, refined sugars and processed foods were not part of our ancestral menu.
The diet is based on the foods that could be hunted, fished, and gathered during the Paleolithic era — meat, fish, shellfish, eggs, tree nuts, vegetables, roots, fruits, and berries. But a true paleolithic diet is impossible to mimic because wild game is not readily available, most modern plant food is cultivated rather than wild, and meats are domesticated. At best, you can eat a modified version of the original diet that’s gluten-free and includes lean meat, organ meats, fish, poultry, eggs, vegetables, fruit, and nuts. It’s a wide variety of foods. However you won’t find any dairy, grains, sugar, legumes, potatoes, processed oils, and any foods that were grown after agriculture started.
On this diet, you’d skip salt and any drinks other than water, coconut water, or organic green tea.
You can satisfy your sweet tooth with raw honey or coconut palm sugar, but only in limited quantities.
Omega-3’s For Better Health, Body Composition and Performance
A proper balance of omega-3s and omega-6s is vital for good overall health. Not only do omega-3s provide benefits for the heart, they also help support athletic performance and recovery.
Fish and fish oil supplements are the richest source of omega-3s — the main two are EPA and DHA.
Fish oil consumption consistently results in lower levels of inflammation. High levels of inflammation can counteract some of exercise’s positive effects on insulin sensitivity and other metabolic benefits. If inflammation remains elevated after exercise, this can negatively impact muscle soreness, tissue repair and other aspects of recovery. Omega-3 fats have also been shown to improve blood flow to muscles during exercise, decrease muscle soreness by 35%, reduce swelling, and increase range of motion after exercise. For this reason Omega 3’s may help speed the recovery process after exercise.
Studies also show that increasing omega-3 levels enhances insulin sensitivity, which improves fat burning and reduces fat storage. Emerging work is even showing that omega-3s may regulate muscle growth and help during extended periods of rest by slowing the loss in both muscle and bone.
In recent studies, omega-3s in combination with exercise where shown to maximize fat loss. In addition, subjects who supplemented with fish oil decreased blood triglycerides by 14%, increased good cholesterol by 10% and improved the functioning of blood vessels. All these lines of research on omega-3s point to better recovery and improved health for athletes.
A general guideline for omega-3 intake is to aim for 500 mg of EPA plus DHA per day, and an optimal level could be 1,000-2,000 mg per day.
Taking omega-3 fats with an antioxidant may also be a good idea since omega-3 fats are highly unsaturated and prone to being broken down by reactive oxygen species (free radicals). Studies have shown synergy between omega-3 fats and vitamin E.
Healthy Food Choices
Make your meal choices easier with this list of healthy carbohydrates, proteins and fats. The two most important choices for your diet include the quality of food you eat and the number of calories you are consuming. The list below contains some healthy options for each type of whole food macronutrient.
Be aware that you should be eating healthy foods but you still need to manage your calories according to your health and fitness goals. Each carbohydrate contains 4 calories per gram, fat provides 9 calories per gram and protein contains 4 calories per gram. Although not a macronutrient, alcohol contains 7 calories per gram.
Proteins:
chicken, cottage cheese, lean beef, eggs, pork tenderloin, protein powder, chicken, duck, turkey, ground chicken and turkey, catfish, cod, flounder, haddock, halibut, herring, mackerel, Pollock, salmon, sea bass, snapper, swordfish, trout, tuna, shrimp
Carbohydrates:
whole oats, yams, sweet potatoes, apples, pears, black beans, black-eyed peas, chickpeas (garbanzo beans), kidney beans, lentils, lima beans, navy beans, pinto beans, soy beans, split peas, white beans, cassava, corn, black-eyed peas, green peas, green lima beans, plantains, potatoes, taro, water chestnuts, acorn squash, butternut squash, carrots, hubbard, squash, red pepper, barley, quinoa, rice
Fats:
flax oil, fish oil, nuts, olives, some fish, avocados, almonds, cashews, hazelnuts (filberts), mixed nuts, peanut butter, pecans, pistachios, pumpkin seeds, sesame seeds, sunflower seeds, walnuts
Cinnamon May Help Control Blood Sugar Levels
A new study found that taking a cinnamon extract for three months helped people with type 2 diabetes have better blood sugar control.
According to Nutrition Research, a study in China followed 66 people being treated for type 2 diabetes, divided into three groups. For three months, the first group received 120 mg of cinnamon extract per day, the second group received 360 mg of cinnamon extract per day, and the third group received a placebo.
At the end of the study, the researchers found the following, which are consistent with a number of previous studies:
• Fasting blood glucose levels were reduced in cinnamon users, but not the placebo group, suggesting that cinnamon improved their bodies’ ability to keep blood glucose down between meals.
• Fasting blood glucose and hemoglobin A1c levels appeared to improve more in people taking the higher amount of cinnamon than people taking the lower amount.
Why Women Often Have More Trouble Losing Weight than Men
One of the biggest factors men have in their favor is body composition. Men tend to have more muscle than women, who in turn have about 10 percent more of their body weight in the form of fat.
Muscle tissue burns three to five times more energy than fat tissues, so as you gain muscle, your metabolic rate increases, which allows you to burn more calories, even when you’re physically inactive. Because of their greater muscle mass, a man’s resting metabolic rate can be up to 10 percent higher than a woman’s (of the same age and weight), giving them a weight-loss advantage.
Men and women vary in the type of fat their bodies are made up of. Men tend to have more visceral fat while women tend to have more subcutaneous fat. Subcutaneous fat is found just under your skin, and is the type that causes dimpling and cellulite. Visceral fat, on the other hand, shows up in your abdomen and surrounds your vital organs including your liver, heart and muscles.
Visceral fat is the one that is linked to heart disease, diabetes and stroke, among many other chronic diseases. So from a health standpoint, having more visceral fat is not a benefit. However, from a weight-loss point of view, visceral fat is metabolized faster, making it easier to lose than subcutaneous fat.
Women may be more inclined to eating for emotional reasons than men – reaching for food (typically junk food) in response to stress, sadness, and loneliness. Research even shows that women may have a reduced ability to stave off hunger and resist food cravings than men.
Nutritional Tips for Optimal Testosterone
Maintaining optimal levels of hormones is important for exercise recovery as well as just feeling your best each day. Below is a list of some nutritional tips for helping to ensure your testosterone levels are at optimal levels.
Get Adequate Vitamin D
A recent study found that men who were deficient in vitamin D (a level below 20 ng/ml) had much lower free Testosterone levels and higher estrogen. Those same men had more body fat, less lean mass, and a greater chance of depression, higher rates of cardiovascular disease, and poorer fertility than men with higher vitamin D levels.
This news was followed up with a groundbreaking study that tested the effect of giving men with vitamin D deficiency who suffered from low Testosterone a supplement of 3,332 IUs of vitamin D or a placebo daily for a year. Men taking the vitamin D supplement increased free Testosterone by 20 percent the supplement also brought vitamin D up to 36 ng/ml. The placebo group had no change in testosterone or vitamin D.
Get Enough Zinc
A 1996 study found that young men with normal Testosterone levels who avoided getting zinc in their diets for 5 months experienced a drop in total Testosterone of more than 50 percent.
Another study showed that giving zinc gluconate to older men who had low Testosterone resulted in doubling the men’s Testosterone levels. More recent data support the relationship between normal Testosterone and higher zinc, and conversely low zinc and low testosterone.
• Low zinc leads to an increase in estrogen receptors and a decrease in androgen receptors.
• Zinc is necessary for androstenedione to be converted to Testosterone.
• Low zinc may increase aromatization of Testosterone to estrogen, just like vitamin D.
Get Enough Magnesium
A recent study found that giving tae kwon do athletes roughly 750 mg of magnesium daily for 4 weeks raised free Testosterone by 26 percent at rest and by 18 percent after a shuttle running test.
Getting adequate magnesium is necessary to avoid throwing off hormone balance and for keeping you lean. A 2011 Italian study was one of the first to show that older men with low magnesium had lower free and total Testosterone than those with the highest magnesium levels.
Avoid Sugar and High Glycemic Carbohydrates
Testosterone is temporarily reduced by having your blood sugar spike, and low Testosterone is pretty much a given if you have diabetes. For example, a new study found that men who had normal insulin health had a 25 percent decrease in Testosterone after ingesting a drink containing sugar. Testosterone remained low for 2 hours, and nearly 80 percent of the men had their Testosterone drop to levels that would be considered clinically deficient
.
The Glycemic Index
You’ve heard of it, but what is the Glycemic Index?
The glycemic index is a ranking of carbohydrates based on their immediate effect on blood glucose (blood sugar) levels. It compares foods gram for gram of carbohydrate. Carbohydrates that break down quickly during digestion have the highest glycemic indexes. The blood glucose response is fast and high. Carbohydrates that break down slowly, releasing glucose gradually into the bloodstream, have low glycemic indexes. What is the Significance of Glycemic Index?

- Low GI means a smaller rise in blood glucose levels after meals
- Low GI diets can help people lose weight
- Low GI diets can improve the body’s sensitivity to insulin
- High GI foods help re-fuel carbohydrate stores after exercise
- Low GI can improve diabetes control
- Low GI foods keep you fuller for longer
- Low GI can prolong physical endurance
What is Glycemic Load?
- Glycemic load builds on the GI to provide a measure of total glycemic response to a food or meal
- Glycemic load = GI (%) x grams of carbohydrate per serving
- One unit of GL ~ glycemic effect of 1 gram glucose
- You can sum the GL of all the foods in a meal, for the whole day or even longer
- A typical diet has ~ 100 GL units per day (range 60 – 180)
- The GI database gives both GI & GL values
How to Switch to a Low GI Diet
- Use breakfast cereals based on oats, barley and bran
- Use “grainy” breads made with whole seeds
- Reduce the amount of potatoes you eat
- Enjoy all types of fruit and vegetables (except potatoes)
- Eat plenty of salad vegetables with vinaigrette dressing
Glycemic Index Range
- Low GI = 55 or less
- Medium GI = 56 – 69
- High GI = 70 or more
To determine a food’s GI rating, measured portions of the food containing 10 – 50 grams of carbohydrate are fed to 10 healthy people after an overnight fast. Finger-prick blood samples are taken at 15-30 minute intervals over the next two hours. These blood samples are used to construct a blood sugar response curve for the two hour period. The area under the curve (AUC) is calculated to reflect the total rise in blood glucose levels after eating the test food. The GI rating (%) is calculated by dividing the AUC for the test food by the AUC for the reference food (same amount of glucose) and multiplying by 100 (see Figure 1). The use of a standard food is essential for reducing the confounding influence of differences in the physical characteristics of the subjects. The average of the GI ratings from all ten subjects is published as the GI of that food.
|
Food category |
|
|
Breads |
|
|
White bread |
70 |
|
Wholemeal bread |
69 |
|
Pumpernickel |
41 |
|
Dark rye |
76 |
|
Sourdough |
57 |
|
Heavy mixed grain |
30-45 |
|
Legumes |
|
|
Lentils |
28 |
|
Soybeans |
18 |
|
Baked beans (canned) |
48 |
|
Breakfast cereals |
|
|
Cornflakes |
84 |
|
Rice Bubbles |
82 |
|
Cheerios |
83 |
|
Puffed Wheat |
80 |
|
All Bran |
42 |
|
Porridge |
46 |
|
Snack foods |
|
|
Mars Bar |
65 |
|
Jelly beans |
80 |
|
Chocolate bar |
49 |
|
Fruits |
|
|
Apple |
38 |
|
Orange |
44 |
|
Peach |
42 |
|
Banana |
55 |
|
Watermelon |
72 |
|
Dairy foods |
|
|
Milk, full fat |
27 |
|
Milk, skim |
32 |
|
Icecream, full fat |
61 |
|
Yogurt, low fat, fruit |
33 |
|
Soft and sports drinks |
|
|
Fanta |
68 |
|
Gatorade |
78 |
