I am already taking Vit D 2000 B complex Zinc 25 mg Magnesium 350 mg Probiotic I am looking to add an amino acid. I am currently experiencing "wired but tired symptoms" Cortisol high at night low in the morning. Hormones out of wack. Elevated heart rate. Hair is falling out. Over heating and not sweating. Retaining water Feeling thirsty . My tests are normal, but the lack of deep refreshing sleep is making things worse. I am looking at NAC, 5-mthf, 5-http. What's the difference between these? What else is out there?