Spermidine where does it come from?

Our body naturally produces some spermidine, with the help of the amino acid arginine, but it decreases as we age. (Greger, 2023, p. 29). By the time we are in our fifties, Spermidine decreases by more than half. (Greger, 2023, p. 29). Spermidine can also be produced by our gut bacteria. (Greger, 2023, p. 29). Just another reason among the many of why it is important to take care of our gut! Trust your gut feeling! Fun fact - over 90% of serotonin, the mood stabilizing hormone, is produced by your gut bacteria.