"the notion that a link to cancer has been both irrefutably proved and deliberately concealed by the medical establishment." Glycine Supplements While he was working on studies concerning amino acid metabolism and aging, Brind began promoting the hypothesis that most diets are deficient in the amino acid glycine, and that this deficiency is responsible for illnesses caused by chronic inflammation, including arthritis, diabetes, cardiovascular disease and cancer. These hypotheses are not supported by mainstream medical or nutritional science. He also claims to have prevented himself from suffering ordinary pain and stiffness after strenuous exercise, and after severe injury, by taking glycine supplements, and, to have accelerated the healing of sunburn, by the same means. In 2010, Brind founded Natural Food Science, LLC, through which glycine supplement products Proglyta and Sweetamine are manufactured and sold. Meta-analysis Brind et al. (1996) conducted a meta-analysis of 23 independent epidemiologic studies of abortion and breast cancer. It calculated that there was on average a relative risk of 1.3 (1.2 - 1.4) increased risk of breast cancer. The meta-analysis was criticized in the Journal of the National Cancer Institute for ignoring the role of response bias and for a "blurring of association with causation." It was also criticized for selection bias by using studies with widely varying results, using different types of studies and not working with the raw data from several studies, and including studies that have methodological weaknesses. The statistician who collaborated with Brind later stated of their findings: "I have some doubts. I don't think the issue has been resolved. When we were talking about the conclusions, he [Brind] wanted to make the strongest statements. I tried to temper them a little bit, but Dr. Brind is very adamant about his opinion." Criticism Experts believe Brind overlooks the methodological weaknesses of some studies he uses as evidence for an abortion-breast cancer link. Furthermore, medical researchers note Brind overstates his findings since his own research shows a "barely statistically significant" increase in breast cancer rates. In reaction to the criticism, an editor of the journal that published Brind's study noted, with concern: However, in the light of recent unease about appropriate but open communication of risks associated with oral contraceptive pills, it will surely be agreed that open discussion of risks is vital and must include the people – in this case the women – concerned. I believe that if you take a