[DavidSharff]

I appreciated their synthesis but I think some general recommendations would have also been useful for the public (imperfect but helpful):

1. Ask primary care physician for a lab referral or purchase a nutrient deficiency test from a straight to consumer lab (cost was lower than I expected at ~$100-$200).

2. Google whether nutrient is actually bioavailable when taken as a supplement.

3. Use independent tests to ascertain brand quality for specific supplement or overall trustworthiness (labdoor is the one I'm familiar with).