Source Naturals Inositol & Choline, 800 mg -50 Vegetarian Tablets

What the brand says

Inositol and choline are B vitamin-like compounds which have similar functions. Both are important components of phospholipids, which make up cellular and other biological membranes, and both play a role in healthy nerve function. Choline is an essential ingredient for the production of acetylcholine, a principal neurotransmitter, while phosphorus-containing compounds of inositol in nerve cells help regulate nerve impulses.*