The gas can be from sugar alcohols (end in -ol) being fermented by gut bacteria or from the sulfur containing amino acids. I would try a protein powder without sugar alcohols. Nutribiotic rice protein is my favorite for the rice protein, I would stay away from soy protein for a number of reasons, and with whey protein it is hard to find good quality; when you do, be prepared to pay a pretty penny. There is also a good hemp protein by Nutiva, Manitoba Harvest and Living Harvest. You will want to make a "shake" out of these with other ingredients.
A word about Muscle Milk, seeing as though many are drinking it:
One of the ingredients is Acesulfame Potassium which has been linked to some serious side effects. Acesulfame Potassium (K) was approved for use by the FDA as a safe artificial sweetener in July, l988. It is a derivative of acetoacetic acid. Unfortunately, several potential problems associated with the use of acesulfame have been raised. They are based largely on animal studies since testing on humans remains limited. The findings showed the following:
Acesulfame K stimulates insulin secretion in a dose dependent fashion thereby possibly aggravating reactive hypoglycemia ("low blood sugar attacks").
Acesulfame K apparently produced lung tumors, breast tumors, rare types of tumors of other organs (such as the thymus gland), several forms of leukemia and chronic respiratory disease in several rodent studies, even when less than maximum doses were given. According to the Center for Science in the Public Interest, it was petitioned on August 29, l988 for a stay of approval by the FDA because of "significant doubt" about its safety.
Dr. H.J. Roberts, Aspartame (NutraSweet) Is It Safe?, Charles Press, page 283/84. Also, it contains Sucralose. Splenda, also known as sucralose, is an artificial sweetener, which is a chlorinated sucrose derivative. Facts about this artificial chemical are as follows:
Pre-Approval Research
Pre-approval research showed that sucralose caused shrunken thymus glands (up to 40% shrinkage) and enlarged liver and kidneys.
Recent Research
A possible problem with caecal enlargement and renal mineralization has been seen in post approval animal research.
Sucralose Breaks Down
Despite the manufacturer's mis-statements, sucralose does break down into small amounts of 1,6-dichlorofructose, a chemical which has not been adequately tested in humans. More importantly, sucralose must break down in the digestive system. If it didn't break down and react at all (as the manufacturer claims), it would not chemically-react on the tongue to provide a sweet taste. The truth is that sucralose does break down to some extent in the digestive system.
Independent, Long-Term Human Research
None. Manufacturer's "100's of studies" (some of which show hazards) were clearly inadequate and do not demonstrate safety in long-term use.
Chlorinated Pesticides
The manufacturer claims that the chlorine added to sucralose is similar to the chlorine atom in the salt (NaCl) molecule. That is not the case. Sucralose may be more like ingesting tiny amounts of chlorinated pesticides, but we will never know without long-term, independent human research.
Conclusion
While it is unlikely that sucralose is as toxic as the poisoning people are experiencing from Monsanato's aspartame, it is clear from the hazards seen in pre-approval research and from its chemical structure that years or decades of use may contribute to serious chronic immunological or neurological disorders.
It is very important that people who have any interest in their health stay aware from the highly toxic sweetener aspartame and other questionable sweeteners such as sucralose (Splenda), and acesulfame-k (Sunette, Sweet & Safe, Sweet One). Please see the extensive resources for sweeteners on the Healthier Sweetener Resource List. http://www.holisticmed.com/sweet/
I hope this is helpful! and not too long!!!
L. Vachani
Holistic Nutrition Consultant
hfwellness.com