Which vitamins/supplements should i take to battle depression?

Not by yourself: I often think of questions like this as fear of looking weak or foolish to someone else. However, sadness and misery suffered alone often gets worse. Consider including your doctor in. Maybe a therpist helping you could carry you farther than your efforts alone.

Not regulated: Agree that including your provider in this discussion is the best place to start. St John's Wort may be as effective as antidepressants, but the FDA doesn't doesn't regulate the potency or purity of this or any other supplement . Because of this, it is not generally recommended. St John's Wort also has potentially dangerous interactions with a number of medications (please check with your Dr)

Individualized: First, I agree with my colleagues that you should see a doctor (preferably an integrative one) for evaluation. You might have hypothyroidism, B12 deficiency, food allergies (including gluten sensitivity) etc. and should be assessed for those.Try a B complex with the L-5-MTHF form of folate (folic acid).5-HTP, SAMe, St. John's Wort and Curcumin can help as much as pharmaceuticals but nothing works for everyone.