We use Natures Trove and Sports Research. Love both.
https://www.amazon.com/Suntheanine%C2%AE-L-Theanine-Double-Strength-Cold-Pressed-Organic/dp/B00TXY32FY/ref=sr_1_5?dchild=1&keywords=theanine&qid=1612012467&sr=8-5
https://www.amazon.com/Suntheanine%C2%AE-L-Theanine-Double-Strength-Cold-Pressed-Organic/dp/B00TXY32FY?th=1
https://www.amazon.com/PhosphatidylSerine-Phosphatidyl-Double-Wood-Supplements/dp/B079YF1K1B/ref=sr_1_3?crid=11H0AVXS1MXPZ&keywords=phosphitadyl+serine&qid=1560805985&s=gateway&sprefix=phosphi%2Chpc%2C157&sr=8-3
https://www.amazon.com/KAL-Magnesium-Glycinate-Chelated-Servings/dp/B00013YZ1Q/ref=sr_1_3?crid=24U4AQZR2O6EU&keywords=magnesium+glycinate&qid=1560806006&s=gateway&sprefix=magnesium+gl%2Caps%2C157&sr=8-3
https://www.amazon.com/Premium-Instant-Kava-Juice-Non-Micronized/dp/B07R7427YC/ref=sr_1_16?keywords=kava&qid=1560806074&s=gateway&sr=8-16&th=1