Now Foods, L-Serine, 500 Mg, 120 Veg Capsules

What the brand says

Serine is a non-essential amino acid that is necessary for the production of phosphatidyl serine, an important component of brain cell membranes.* Serine is also involved in muscle formation, maintenance of immune system function, and brain health.* It is also essential for the maintenance and growth of healthy neurons.*