I agree with the above. supplements aren't regulated, they are considered a food. my brother told my mother to take a bunch of different ones, it affected her kidneys and I got yelled at by her drs because they assumed it was of course the hippie dippie daughter pushing this stuff. But she wouldn't listen to me if I warned her a truck was gonna hit her. she stopped taking them, went on a strict kidney diet and regained function, which NEVER happens with kidneys. so the supplements were really messing up her numbers. I made her see the dr because I noticed pink in the toilet because she would forget to flush. (and i'm the bad kid.)