Study: Over-the-counter “brain enhancement” supplements in the US found both to a) contain multiple unapproved drugs and b) lack some ingredients listed on the label

Study: Your Brain Sup­ple­ments Could Con­tain Dan­ger­ous, Ille­gal Ingre­di­ents (Being Patient): Brain sup­ple­ments that claim to boost cog­ni­tive func­tion are increas­ing­ly pop­u­lar, grow­ing from a $4 bil­lion indus­try of about 4,000 unique prod­ucts to a $40 bil­lion indus­try with as many as 80,000 dif­fer­ent prod­ucts on the market. 

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