erm what? So you're classifying the entire nutra industry bh by facebook's standards? Not true at all.Yes it's difficult to find a clean offer, but by no means is it all bh.
To the OP, I suggest you research what Facebook's advertising policies are, and more importantly ask your network AM to advise you of a clean offer (although AM's are notorious for lying/not knowing themselves). A4D has a lot of clean offers (their CEO was sued years back for running rebills and since then has become more and more whitehat) so that's a good starting point.
Referring back to nutra, where it becomes BH is if you make unsubstantiated claims or use before/after pictures. So an example of this would be:
BH: "Lose 50lb with this in 6 weeks. Look how this person did it too:"
WH: "This product promotes healthy weight loss by using these core amino acids: x, y, z"
To further check whether an offer will be acceptable, one of the metrics Facebook uses (although I don't know why since it's been proven a scam) is WOT score.
Just be advised, starting with a whitehat offer from day 1 without ANY data can be very very very painful on facebook. My suggestion would remain to start bh, and then slowly drop your aggression , eventually leading to WH - that way you build your data and understand your audience better.