I've read a few posts that said zinc inhibit 5 alpha reductase and reduces DHT, hence it's good for acne.
But then there's this study:
Effect of Zinc Administration on Plasma Testosterone, Dihydrotestosterone, and Sperm Count
"T and DHT rose significantly after oral administration of zinc"
So it looks like zinc actually increases DHT significantly. Does that mean zinc is something to avoid? Are there any studies that show zinc is actually good for acne?