Brain aging begins decades before the first missed word. A functional medicine approach asks what the brain needs to build membranes, make neurotransmitters, calm inflammation, and keep methylation running—then supplies it. This month we look at five supplements with published human data on memory and cognitive aging. Each supports a whole-person plan alongside hormone therapy. None replaces screening, medical evaluation, or dementia care.

Citicoline (CDP-Choline)

Citicoline delivers two building blocks the aging brain uses constantly. Choline feeds acetylcholine, the neurotransmitter at the center of learning and memory, and supports the phospholipids in neuronal membranes. Cytidine converts to uridine, which supports synaptic membranes. In a randomized, double-blind, placebo-controlled trial of 100 adults aged 50 to 85 with age-associated memory impairment, 500 mg daily for 12 weeks produced greater gains in episodic memory and composite memory than placebo. A Cochrane review of placebo-controlled trials in older adults found benefit for memory and behavior, with stronger gains in global clinical impression. For patients who notice memory slips as they age, citicoline gives providers a nutrient-based option that fits alongside hormone optimization.

Clinical Note (Dosing):

The 12-week randomized trial used 500 mg daily. Reassess memory concerns after three months of use.

Safety Considerations:

Citicoline was well tolerated in the randomized trial and across the Cochrane review. Review the medication list in patients taking cholinergic agents or treatment for dementia. Memory change deserves a full medical evaluation, and citicoline does not replace one.

Key References

Nakazaki, E., Mah, E., Sanoshy, K., Citrolo, D., & Watanabe, F. (2021). Citicoline and memory function in healthy older adults: A randomized, double-blind, placebo-controlled clinical trial. The Journal of Nutrition, 151(8), 2153–2160. https://doi.org/10.1093/jn/nxab119

Fioravanti, M., & Yanagi, M. (2005). Cytidinediphosphocholine (CDP-choline) for cognitive and behavioural disturbances associated with chronic cerebral disorders in the elderly. Cochrane Database of Systematic Reviews, 2005(2), CD000269. https://doi.org/10.1002/14651858.CD000269.pub3

Świątkiewicz, M., & Grieb, P. (2023). Citicoline for supporting memory in aging humans. Aging and Disease, 14(4), 1184–1195. https://doi.org/10.14336/AD.2022.0913