There was a good thread on this recently:
http://www.marksdailyapple.com/forum/thread79286.html
I've just recently started taking supplements tablets. I was a bit afraid of putting unnecessary strain on my liver, but I don't think I'm getting what I need from my diet. So I take:
- Vit D (when tracking my nutrients I realised that I never get more than 25% of the RDA)
- Magnesium (kept getting cravings for cashew nuts. This stopped it).
- Alfalfa (meant to help your body make collagen)
- Vit B complex (on days when I don't eat eggs. Meant to be good for skin).
And for a while I've been taking:
- Powered grass-fed beef gelatine (on heavy exercise days)
- Two tea spoons of coconut oil (if my skin felt dry)
- A spoon of sugar in tea (if my thyroid felt sluggish... as per Ray Peat).
- Iron (I have a tendency towards anemia, but I only take this at my TOM).