I'm aware of natural supplements to treat depression and anxiety, but what OTC natural supplement helps to treat a add?

Add? Some have benefited from using flaxseed oil at high dose, although results are mixed, if used alone.
ADD. There are some studies that indicate that supplanting with omega-3's helps increases concentration and focus in those with add, regular aerobic exercise does as well. My bestg.

Related Questions

What is the best natural supplement or vitamin to reduce anxiety and depression?

Check Vitamin D. Get your 25 hydroxy Vitamin D level checked. If it is low, then you may need supplementation. Almost half of the population suffers from low Vitamin D insufficiency which has been associated w/ depression and even psychoses. Low magnesium has also been linked to anxiety. You should consult w/ your dr. to have a full history, physical and labwork done & follow his or her advice. Read more...
Anxiety and suppleme. There isn't a body of research showing that any supplement will definitely reduce mood disorder. If you are trying something I always recommend buying smallest bottle so you don't waste your money, and keep a mood diary. FDA doesn't regulate supplements so science is not as good, but even prescribed mood meds work different on different people. St John's Wort might help but may take months. Read more...

What is the safest natural supplement for anxiety and depression. That I can take with xanax (alprazolam)?

None. If you are taking xanax (alprazolam), (alprazolam) chances are there will be no extra benefit from any supplement because none would compare with that. There are different supplements that can be used in anxiety - valerian root, 5-htp for example, but the safety of those with xanax (alprazolam) has not been established. Read more...