How much spermidine per day? Dont know.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5718121/
https://www.amazon.com/RPI-Spermidine-Purity-Molecular-Biology/dp/B0771SJFSQ
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5718121/
https://www.amazon.com/RPI-Spermidine-Purity-Molecular-Biology/dp/B0771SJFSQ