The study used five to ten grams, of which the upper amount could cause stomach and other issues.
I take 2 grams L-arginine every day, occasionally 4. And like some other people, I have observed that it markedly improves the quality of nighttime sleep without in any way causing drowsiness during the day. Mechanism unknown, AFAIK.
It’s an amino acid. But I’ve been told that it also makes one susceptible to shingles. I happened to be taking it right before I got a very bad case of shingles and was told to quit. As with anything, do your research.
Simple fasting will also enhance radiation or chemo as healthy cells are made stronger by autophagy while cancer cells remain as is, thus susceptible.