Comparison
Curcumin vs Spermidine
Side-by-side of Curcumin 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.
Curcumin
Curcumin supplement guide: turmeric extract at 500-1000 mg/day, piperine and Meriva for absorption, evidence in joint inflammation and mood.
Spermidine
Spermidine supplement benefits cover autophagy induction, longevity signals, and cognition. Wheat germ extract data, doses, and human trials reviewed.
Effects at a glance
Curcumin
- •Reduces osteoarthritis knee pain comparable to ibuprofen at 1500 mg/day enhanced formulation
- •Modest antidepressant effect (SMD ~0.34) as monotherapy or SSRI adjunct in major depression
- •Standard curcumin has ~3% bioavailability; Meriva, BCM-95, Theracurmin shift absorption 5-30 fold
- •Inhibits NF-kB and COX-2; reduces hs-CRP, IL-6, TNF-alpha in chronic inflammation
- •Antiplatelet effect at higher doses; meaningful interaction with warfarin and DOACs
- •Iron chelation can contribute to deficiency in already-marginal patients
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 | Curcumin | Spermidine |
|---|---|---|
| Category | natural | supplement |
| Also known as | turmeric extract, diferuloylmethane | spermidine trihydrochloride, wheat-germ-extract spermidine |
| Half-life (hr) ↗ | 7 | 6 |
| Typical dose (mg) ↗ | 500 | 1.2 |
| Dosing frequency | 1 to 2 times daily with meals | daily, typically morning with food |
| Routes | oral | oral |
| Onset (hr) | 2 | 2 |
| Peak (hr) | 4 | 4 |
| Molecular weight | 368.38 | 145.25 |
| Molecular formula | C21H20O6 | C7H19N3 |
| Mechanism | Inhibits NF-kB transcription factor, COX-2, and lipoxygenase; activates AMPK and Nrf2; modulates JAK-STAT and PI3K-Akt kinase signaling. Pleiotropic anti-inflammatory and antioxidant effects. | 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 (global) | OTC dietary supplement (wheat-germ extract has GRAS status in US) |
| WADA status | allowed | allowed |
| DEA / Rx | Not scheduled | OTC supplement (not scheduled) |
| Pregnancy | Culinary turmeric is safe; supplemental curcumin best avoided in pregnancy | Insufficient data; not routinely recommended at supplemental doses |
| CAS | 458-37-7 | 124-20-9 |
| PubChem CID | 969516 | 1102 |
| Wikidata | Q312266 | Q411089 |
Safety profile
Curcumin
Common side effects
- nausea
- diarrhea
- dyspepsia
- yellow stool (benign)
Contraindications
- active gallstones (curcumin stimulates gallbladder contraction)
- severe biliary obstruction
- scheduled elective surgery (discontinue 1-2 weeks prior)
Interactions
- warfarin and DOACs: additive antiplatelet and anticoagulant effects; meaningful bleeding risk at 1000+ mg/day(major)
- aspirin and NSAIDs: additive antiplatelet effect(moderate)
- tacrolimus and cyclosporine: CYP3A4 and P-gp modulation may alter drug levels(moderate)
- iron supplements: curcumin chelates iron; can contribute to deficiency in marginal patients(moderate)
- chemotherapy agents: potential interference with multiple agents; coordinate with oncology team(major)
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?
Curcumin 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 post-training recovery, pick Curcumin.
- → If your priority is joint health, pick Curcumin.
- → If your priority is focus or working memory, pick Spermidine.
Default choice: either is defensible. Curcumin 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 Curcumin and Spermidine?
Curcumin and Spermidine differ in category (natural vs supplement), mechanism, and typical dosing. See the side-by-side table for full details.
Which has a longer half-life, Curcumin or Spermidine?
Curcumin half-life is 7 hours; Spermidine half-life is 6 hours.
Can you stack Curcumin with Spermidine?
Stack compatibility depends on mechanism overlap, legal status, and individual response. Check each compound page for specific interactions and contraindications before combining.
Go deeper