I am a nutrition junky.... I also LOVE herbal stuff and performance supplements. I'm more familiar with European and Indian herbs vs Chinese but I know there are some great ones out there.
Things I keep on hand;
Slippery Elm Powder & Aloe Juice
Vitamin E and multi vitamin
Alpha Omega Recovery (for the older horses) L-Glutamine
Apple Cider Vinegar
Coconut Oil Chaga Mushroom (mostly for my own tea)
Things I'm curious about using;
Raspberry Leaves for mares - can you harvest and dry your own?? Triphala - Amalaki , Bibhitaki, and Haritaki
Hemp Oil - I've heard good and bad
Chaste Berry Kelp - I used to feed it and I stopped after several vets recommended against it - does it help IR horses? What else is good?