Choline Bitartrate
Choline Bitartrate is a tier 2 form of Choline, used in 4,762 on-market products and providing 41.1% elemental choline by weight.
4,762
on-market products
tier 2
quality tier
41.1%
elemental fraction
Basis: choline cation MW 104.17 / choline bitartrate MW 253.25 (both confirmed PubChem formulas)
Why this tier: The most common, cheapest commercial salt form, but a head-to-head RCT found natural phosphatidylcholine (egg yolk) produced roughly 4x greater plasma choline absorption than choline bitartrate.
Source: Smolders L et al. 2019, Nutrients 11(11):2758, PMID 31766273