They are both choline. The difference is what the research shows and what they cost.
Choline bitartrate
Choline bound to tartaric acid. It is the most common form on shelves, and the reason is economics: it is inexpensive to produce, so it is what a formulator reaches for when the label needs the word "choline" and little of the budget can go to it.
The evidence in healthy adults is the weak point. One 2026 pilot trial gave 20 postmenopausal women a single 1,650 mg dose of choline bitartrate and found no difference in working-memory performance against placebo — though brain activation did change (Dumas et al., 2026 — on our citations page). That is a narrower finding than "it does nothing", and the finding is worth keeping that narrow.
Alpha-GPC
A highly bioavailable form, and of the two on this page the one with a clinical research record in cognition. Review-level evidence describes it as able to cross the blood–brain barrier.
It costs meaningfully more per gram than bitartrate. That single fact explains most of what the supplement aisle looks like.
How to tell them apart in ten seconds
Turn the pack over and read the ingredients panel. Whichever of alpha-GPC, citicoline or choline bitartrate is printed there is the answer. There is no trick to it and nothing is hidden — it is simply a detail almost nobody checks.
Then check whether the milligrams are printed at all. If the label says "proprietary blend", the amounts are legally allowed to be withheld, and that is usually why the phrase is there.
Where we stand
On Weal Focus the choline is printed as Alpha-GPC, with L-alpha-glycerylphosphorylcholine beneath it and 300 mg beside it — form and amount, both printed, neither inside a blend. That is all this page asks any label to do.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Sources for the claims and figures on this page, with the population studied in each, are on our citations page.