I would go with creatine (3-5g daily), a decent multi if you don't eat many veggies and fruits, methyl B12 (1000mcg weekly injections or 5000mcg daily sublingual lozenges by Jarrows), Vitamin C (3-6g daily pre and post workout), vitamin D3 (5000ius daily), taurine (3-10g daily for back pumps, I get them on test), NAC (1200mg daily in an am/PM dose), and that's about a pretty basic list. Your have to evaluate your diet or get labs done to see if you're deficient in anything or lacking n