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Alpha-GPC vs Citicoline

Compare Alpha-GPC and Citicoline: timing, food, doses, forms and existing interaction guidance.

Alpha-GPC vs Citicoline
Alpha-GPCCiticoline
CategoryOtherOther
Best timeOn waking / BreakfastOn waking / Breakfast
FoodWith or without foodWith or without food
Common dose300–1200 mg250–1000 mg
Upper limit
Not established
Not established
SolubilityWater-solubleWater-soluble
DescriptionCholine source that supplies the building blocks of acetylcholine. In a 12-week Korean trial in mild cognitive impairment it improved a cognitive score more than placebo. But a 10-year Korean national cohort linked alpha-GPC use to a higher stroke risk that rose with dose — an observational finding that needs confirming.Supplies choline and cytidine, building blocks of brain cell membranes. In a 12-week trial in healthy older adults with age-related memory complaints, 500 mg/day improved episodic memory. A large trial in acute stroke found no benefit.
Timing noteEarlier in the day; larger amounts are often split into two or three doses.Morning, with or without food.
Forms to look for
  • Check the actual alpha-GPC per serving — some powders are only 50% alpha-GPC
  • Citicoline sodium at the trial dose (500 mg/day)
References
  1. 01Jeon J et al. Efficacy and safety of choline alphoscerate for amnestic mild cognitive impairment: a randomized double-blind placebo-controlled trial. BMC Geriatr 2024.
  2. 02Lee G et al. Association of L-α glycerylphosphorylcholine with subsequent stroke risk after 10 years. JAMA Netw Open 2021.
  1. 01Nakazaki E et al. Citicoline and memory function in healthy older adults: a randomized, double-blind, placebo-controlled clinical trial. J Nutr 2021.
  2. 02Dávalos A et al. Citicoline in the treatment of acute ischaemic stroke: an international, randomised, multicentre, placebo-controlled study (ICTUS trial). Lancet 2012.

Common product or study range — not a personal recommendation. Upper limits are ceilings, not targets.

If you take both

NoteMechanism-based

No need to take both — they supply choline for the same purpose, and the pair hasn't been studied.

Pick one. Given the stroke signal seen with alpha-GPC in a large cohort, citicoline is the more conservative choice.

See interaction
  1. 01Lee G et al. Association of L-α glycerylphosphorylcholine with subsequent stroke risk after 10 years. JAMA Netw Open 2021.
  2. 02Nakazaki E et al. Citicoline and memory function in healthy older adults: a randomized, double-blind, placebo-controlled clinical trial. J Nutr 2021.
Alpha-GPC
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Citicoline
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Common questions

What is the difference between Alpha-GPC and Citicoline?

Alpha-GPC: Choline source that supplies the building blocks of acetylcholine. In a 12-week Korean trial in mild cognitive impairment it improved a cognitive score more than placebo. But a 10-year Korean national cohort linked alpha-GPC use to a higher stroke risk that rose with dose — an observational finding that needs confirming. Citicoline: Supplies choline and cytidine, building blocks of brain cell membranes. In a 12-week trial in healthy older adults with age-related memory complaints, 500 mg/day improved episodic memory. A large trial in acute stroke found no benefit.

Can I take Alpha-GPC and Citicoline together?

No need to take both — they supply choline for the same purpose, and the pair hasn't been studied.

Last reviewed Sourced from NIH fact sheets and peer-reviewed studies.How we make this contentReport an error