Comparison
Citicoline vs Spermidine
Side-by-side of Citicoline and Spermidine. Every row below is pulled from the compound schema and will update as our data grows. For deeper reads, follow through to each compound page.
Citicoline
Citicoline supplement profile: CDP-choline as a phosphatidylcholine precursor, Cognizin dosing 250-2000 mg, cognition trials, stroke recovery evidence.
Spermidine
Spermidine supplement benefits cover autophagy induction, longevity signals, and cognition. Wheat germ extract data, doses, and human trials reviewed.
Effects at a glance
Citicoline
- •Choline donor and phosphatidylcholine precursor; oral bioavailability roughly 99%
- •Standard prescription medication for stroke recovery and vascular cognitive impairment in much of the world
- •Healthy-adult cognitive trials (Cognizin) report small gains in attention and working memory at 250 to 500 mg/day
- •ICTUS trial (n=2,298) was negative on stroke recovery in the modern thrombolysis era
- •Lower per-gram choline content than alpha-GPC (~18% vs ~40%), meaning smaller TMAO load at equivalent dose
- •Long uridine half-life (~56 hours) supports once or twice daily dosing
Spermidine
- •Endogenous polyamine that induces autophagy via EP300 acetyltransferase inhibition and TFEB activation
- •Concentrated in wheat germ, soybeans, aged cheese, and mushrooms; ~10 to 15 mg/day in Mediterranean diets
- •Eisenberg 2016 reported dietary spermidine extended mouse lifespan and improved cardiac function
- •Wirth 2018 pilot (n=28) reported cognitive signal at 0.9 mg/day in older adults at risk for dementia
- •Larger Wirth 2019 follow-up (n=85) did not replicate the memory benefit at 12 months
- •Generally regarded as safe at supplemental doses; food-source position is reassuring
Side-by-side
| Attribute | Citicoline | Spermidine |
|---|---|---|
| Category | supplement | supplement |
| Also known as | CDP-choline, cytidine 5'-diphosphocholine, Cognizin | spermidine trihydrochloride, wheat-germ-extract spermidine |
| Half-life (hr) ↗ | 56 | 6 |
| Typical dose (mg) ↗ | 500 | 1.2 |
| Dosing frequency | 1 to 2 times daily | daily, typically morning with food |
| Routes | oral, intravenous | oral |
| Onset (hr) | 1 | 2 |
| Peak (hr) | 2 | 4 |
| Molecular weight | 488.32 | 145.25 |
| Molecular formula | C14H26N4O11P2 | C7H19N3 |
| Mechanism | Hydrolyzed to cytidine and choline after absorption; both cross the blood-brain barrier and are recombined intracellularly to reform CDP-choline, supporting phosphatidylcholine synthesis and acetylcholine production. | Induces macroautophagy via inhibition of EP300 histone acetyltransferase and activation of TFEB-mediated lysosomal biogenesis. Substrate for hypusination of eIF5A, required for translation of mitochondrial respiration proteins. |
| Legal status | Dietary supplement (US, Cognizin GRAS); prescription medication in most of the world | OTC dietary supplement (wheat-germ extract has GRAS status in US) |
| WADA status | allowed | allowed |
| DEA / Rx | OTC supplement (US); Rx in most of the world | OTC supplement (not scheduled) |
| Pregnancy | Insufficient data for routine use | Insufficient data; not routinely recommended at supplemental doses |
| CAS | 987-78-0 | 124-20-9 |
| PubChem CID | 13804 | 1102 |
| Wikidata | Q411470 | Q411089 |
Safety profile
Citicoline
Common side effects
- mild GI upset
- headache
- restlessness
- occasional insomnia with evening dosing
Contraindications
- concurrent strong anticholinergic therapy
- established cardiovascular disease (TMAO concern, smaller than alpha-GPC)
Interactions
- anticholinergic medications: partial mutual antagonism(minor)
- cholinesterase inhibitors: additive cholinergic effect(minor)
- antimetabolite chemotherapy (5-FU): theoretical cytidine pathway interaction(minor)
Spermidine
Common side effects
- mild GI upset (rare)
- headache (rare)
Contraindications
- wheat-germ allergy or celiac disease (for wheat-germ-extract products)
- active cancer (theoretical)
- pregnancy and lactation (insufficient data)
Interactions
- DFMO (difluoromethylornithine): competing polyamine metabolism; do not combine without oncology guidance(moderate)
Which Should You Take?
Citicoline and Spermidine score evenly on the criteria we weight (goal breadth, legal accessibility, evidence depth). The conditionals below should drive the decision more than any aggregate score.
- → If your priority is stroke recovery, pick Citicoline.
- → If your priority is choline supply, pick Citicoline.
- → If your priority is healthspan extension, pick Spermidine.
Edge case: Half-lives differ materially (Citicoline ~56 hr vs Spermidine ~6 hr). Citicoline reaches steady state faster; Spermidine is easier to dial in if tolerability is uncertain.
Default choice: either is defensible. Citicoline edges out on goal breadth + legal accessibility; Spermidine is the right call if your priority sits in the goals listed above.
This verdict is generated from each compound's schema (goals, legal status, evidence outcomes, dosing route). It updates automatically as our compound data evolves; the deeper read sits on each individual compound page.
Common questions
What is the difference between Citicoline and Spermidine?
Citicoline and Spermidine differ in category (supplement vs supplement), mechanism, and typical dosing. See the side-by-side table for full details.
Which has a longer half-life, Citicoline or Spermidine?
Citicoline half-life is 56 hours; Spermidine half-life is 6 hours.
Can you stack Citicoline with Spermidine?
Stack compatibility depends on mechanism overlap, legal status, and individual response. Check each compound page for specific interactions and contraindications before combining.
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