Supplements for Leukemia?

Hello my friend has AML (acute Myeloid Leukemia) is 25 and has just started chemo. We did not have time to waste assessing natural alternatives however i dont want to rely solely on conventional medicine as it has bad success rates. I want to help support him with supplementation during chemo but i am aware that any anti-oxidation can benefit cancer cells. I also want to know about supplementation to achieve optimal health to avoid relapse after chemo, - regarding deficiencies, toxicities, ph levels, oxygenation etc.

has anyone heard of, tryed, or had success with Amino acid L-Theanine, Zeolite, oxy-3, or others?

I need help please!