[EricaB]

Do not take PABA alongside sulphur-containing nutrients (MSM or NAC) or drugs (sulfa) as it inactivates them.

I've been researching getting something for my nails. Each of the combination "Hair, Skin and Nails" products that I checked out contain a bunch of vitamins and minerals just like a multivitamin, and also both PABA and MSM. While I wouldn't buy them as I don't want to overdose on the normal vitamins and minerals, it makes me wonder if the manufacturers have any idea what they're doing - aside from packing a bunch of chemicals into a capsule and trying to make money.

For all of its inefficiencies and inadequacies, sometimes I wish the FDA or someone (such as Consumer's Reports) would check out the supplement industry to make sure they're doing a decent job.