Listen in as Dr. Mike provides the answers to a wealth of health and wellness questions. Here you'll find the answers to a wealth of health and wellness questions posed by Healthy Talk fans. Listen in because what you know helps ensure healthy choices you can live with. Today on Healthy Talk, you wanted to know:I understand that some weight loss products were found to contain amphetamines. Why should we believe anything coming out of the supplement industry?Unfortunately, this did in fact happen and was revealed by a Harvard study released this month.What was reported was that 11 "all natural" weight loss supplements contained BMPEA, which the researchers are calling a close chemical cousin to amphetamines.Many things in nature, or products developed in a lab, can resemble the same effects of amphetamines, like a boost of energy and decrease in appetite. The specific products that were studied also contained a Texas shrub, blackbrush, on the labels. The manufacturers could be hiding the amphetamines within the blackbrush. Since blackbrush contains natural BMPEA, they could blame the amphetamines on the BMPEA.But here's the thing that makes Dr. Mike disgusted: blackbrush has never previously been shown to contain any amphetamine cousin of any kind. So, the manufacturers might have lied.This makes Dr. Mike very frustrated, since something like this can turn consumers like yourself away. Dr. Mike doesn't want companies such as these ruining the reputation of other, highly credible companies.I tried taking 500 mg of curcumin, and after two weeks I noticed lower back muscle discomfort and joint pain. It did help with anxiety, though. Many symptoms were similar to statins and niacins, which I also can't take in significant doses.Curcumin isn't one of Dr. Mike's foundational nutrients in the supplement pyramid, but if he had to pick a fifth one, curcumin would be it.Dr. Mike thinks you may not be doing the best formulation of curcumin, which is BCN-95. The appropriate dose of that is 400 mg.If you have a health question or concern, Dr. Mike encourages you to write him at askdrmikesmith@radiomd.com or call in, toll-free, to the LIVE radio show (1.844.305.7800) so he can provide you with support and helpful advice.