What is Alpha-GPC?
Alpha-GPC (alpha-glycerophosphocholine) is a compound that delivers choline to the brain efficiently. Choline is a precursor to acetylcholine, a neurotransmitter involved in muscle contraction, focus, and memory. It is found naturally in small amounts in the body and in some foods, and is supplemented for cognitive and performance benefits.
How it works
Alpha-GPC crosses the blood-brain barrier and increases the availability of choline for acetylcholine production. Acetylcholine is the neurotransmitter that fires your muscles and supports focus and learning. The theory is that boosting it sharpens the mind-muscle connection in the gym and improves concentration, with some evidence for power output.
What the research says
- Some studies show improvements in power output and force production
- Supports focus and the mind-muscle connection during training
- Investigated for cognitive and memory benefits, with mixed but promising results
- Effects on power are not seen in every study, so evidence is still building
- Generally regarded as one of the more effective choline sources
Effective dose
300–600mg taken 30–60 minutes before training is the typical range. Higher doses are sometimes used for cognitive purposes. It is often combined with caffeine and L-theanine in pre-workouts for a focus and performance stack. Start at the lower end to assess tolerance.
What to check on the label
Check the actual Alpha-GPC dose, as the ingredient is often sold at 50% concentration, meaning 600mg of the raw ingredient provides 300mg of actual Alpha-GPC. Reputable products clarify this. As always, be wary of proprietary blends that hide the true dose, since Alpha-GPC is expensive and is a common ingredient to underdose.
Safety
Alpha-GPC is well tolerated at normal doses. Side effects are uncommon but can include headache, nausea, or dizziness, usually at higher doses. As with any nootropic, start low and see how you respond. Anyone with a health condition or on medication should check with a doctor first.