The paper, published in the American Journal of Public Health, reviews the use of these pills in the US, Spain and Brazil from the 40s, and discusses their current availability through the internet.
These supplements have replaced the famous "rainbow pills" prohibited during the 70s-90s and they are excluded from the strict rules that apply to pharmaceutical drugs, since they are not considered to be drugs. However, some of these supplements contain a dangerous combination of substances to supress hunger and drugs to counteract the adverse effects of those substances.
The article "The Return of the Rainbow Diet Pills" has been published in the American Journal of Public Health. Albert Goday, section chief of endocrinology at the Hospital del Mar, and an IMIM researcher, is one of the co-authors of the paper.
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