One more explanation: some supplements might come from untrustworthy manufacturers and be contaminated with an unidentified toxin. That’s a tough one to test, since it’s unlikely that any of the studies saved samples of the pills they used or even documented where they came from.
One more explanation: some supplements might come from untrustworthy manufacturers and be contaminated with an unidentified toxin. That’s a tough one to test, since it’s unlikely that any of the studies saved samples of the pills they used or even documented where they came from.