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Alpha-GPC — Frequently Asked Questions

This content is for informational purposes only and does not constitute medical advice. Consult your healthcare provider before starting any supplement. Full disclaimer

Frequently Asked Questions

Alpha-GPC vs CDP-Choline — which is better?

Alpha-GPC delivers more choline per gram (40% vs 18%) and has stronger evidence for athletic performance. CDP-Choline (citicoline) provides additional uridine, which supports dopamine and neuronal membrane synthesis. For pure choline delivery and power output, choose Alpha-GPC. For broader nootropic and neuroprotective effects, CDP-Choline may be preferred.

Does Alpha-GPC increase growth hormone?

A small study showed a significant GH spike when Alpha-GPC was taken before exercise. However, this acute increase is transient and unlikely to produce meaningful anabolic effects comparable to exogenous GH. The athletic benefits of Alpha-GPC are more reliably attributed to enhanced neuromuscular function via increased acetylcholine.

Can Alpha-GPC cause headaches?

Yes. Headaches are the most common side effect and are typically caused by excess acetylcholine. This is especially likely when stacking Alpha-GPC with other cholinergics. Reducing the dose to 150-300mg usually resolves the issue. Starting at a lower dose and gradually increasing is recommended.

Full Alpha-GPC Guide

References

  1. (). Cognitive improvement in mild to moderate Alzheimer's dementia after treatment with the cholinergic precursor choline alfoscerate. Clinical Therapeutics. DOI
  2. (). Acute supplementation with alpha-glycerylphosphorylcholine augments growth hormone response to, and peak force production during, resistance exercise. Journal of the International Society of Sports Nutrition. DOI
  3. (). Glycerophosphocholine enhances growth hormone secretion and fat oxidation in young adults. Nutrition. DOI