Phosphatidylcholine
Phosphatidylcholine is a tier 1 form of Choline, used in 494 on-market products .
494
on-market products
tier 1
quality tier
n/a
elemental fraction
Basis: Not a fixed stoichiometric fraction -- varies with the fatty-acid composition of the specific phosphatidylcholine molecule; left uncalculated rather than estimated
Why this tier: Same RCT found phospholipid-bound (natural) choline significantly more bioavailable than the synthetic bitartrate salt in humans.
Source: Smolders L et al. 2019, PMID 31766273