About Serine
Non-essential amino acid the body synthesizes readily and that is abundant in dietary protein, so free-form supplementation is largely redundant in healthy people. L-serine is under investigation for neurodegenerative disease (a Phase I ALS trial found doses up to 30 g/day safe and hinted at slowed functional decline vs historical controls, but this is preliminary and unreplicated). Note: this is distinct from phosphatidylserine, which has its own (also modest) cognitive evidence. Grade low: only early-phase investigational data, nothing supporting general supplement use.
What Serine supports
- Building block for proteins and neurotransmitter pathways (mechanistic)
- Under early investigation for neurodegenerative disease at high doses
How much Serine to take
The RDA prevents deficiency. The effective range is what clinical trials used to actually move the outcome.
Effective
500–3000
mg
No established therapeutic supplement dose; nominal range for a blend component. Investigational ALS trials used far higher doses (up to 15 g twice daily), which are experimental, not general-use.
Clinical evidence
Limited clinical evidence. Non-essential amino acid; only early-phase investigational data (ALS). No general-use evidence.
Reference