Comparison
Berberine vs Spermidine
Side-by-side of Berberine 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.
Berberine
Berberine supplement guide: 1500 mg/day lowers fasting glucose and HbA1c, AMPK activation, metformin parity in RCTs, dihydroberberine absorption.
Spermidine
Spermidine supplement benefits cover autophagy induction, longevity signals, and cognition. Wheat germ extract data, doses, and human trials reviewed.
Effects at a glance
Berberine
- •Lowers HbA1c by ~0.7% versus placebo at 1500 mg/day across 27-trial meta-analysis (Lan 2015)
- •Roughly comparable to metformin on fasting glucose and HbA1c in small head-to-head RCTs (Yin 2008)
- •Reduces LDL cholesterol 10-20% and triglycerides 15-25% via PCSK9 inhibition
- •Activates AMPK, the cellular energy sensor that drives insulin-independent glucose uptake
- •Oral bioavailability under 1%; dihydroberberine is the higher-absorption alternative at lower doses
- •GI side effects affect 10-30% at 1500 mg/day; split dosing with meals reduces incidence
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 | Berberine | Spermidine |
|---|---|---|
| Category | natural | supplement |
| Also known as | berberine HCl, berberine hydrochloride | spermidine trihydrochloride, wheat-germ-extract spermidine |
| Half-life (hr) ↗ | 3 | 6 |
| Typical dose (mg) ↗ | 1500 | 1.2 |
| Dosing frequency | 3x daily with meals | daily, typically morning with food |
| Routes | oral | oral |
| Onset (hr) | 2 | 2 |
| Peak (hr) | 3 | 4 |
| Molecular weight | 336.36 | 145.25 |
| Molecular formula | C20H18NO4+ | C7H19N3 |
| Mechanism | Activates AMP-activated protein kinase (AMPK), suppressing hepatic gluconeogenesis and lipogenesis while increasing peripheral glucose uptake. Inhibits PCSK9 transcription, modulates bile acid signaling, and shifts gut microbiome composition. | 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, EU, UK, Canada); Rx in some Asian jurisdictions | OTC dietary supplement (wheat-germ extract has GRAS status in US) |
| WADA status | allowed | allowed |
| DEA / Rx | Not scheduled | OTC supplement (not scheduled) |
| Pregnancy | Contraindicated (kernicterus risk in neonates) | Insufficient data; not routinely recommended at supplemental doses |
| CAS | 2086-83-1 | 124-20-9 |
| PubChem CID | 2353 | 1102 |
| Wikidata | Q411435 | Q411089 |
Safety profile
Berberine
Common side effects
- constipation
- diarrhea
- abdominal cramping
- flatulence
- nausea
Contraindications
- pregnancy
- lactation
- neonatal jaundice
- severe liver disease
Interactions
- metformin: additive HbA1c reduction; additive GI side effects(moderate)
- insulin or sulfonylureas: additive hypoglycemia risk; dose adjustment may be required(major)
- statins (simvastatin, atorvastatin): CYP3A4 inhibition raises statin plasma levels(moderate)
- cyclosporine: raises cyclosporine levels through CYP3A4 and P-gp inhibition(major)
- calcium channel blockers (amlodipine): elevated plasma levels via CYP3A4 inhibition(moderate)
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?
Berberine 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 metabolic health and glucose control, pick Berberine.
- → If your priority is cardiovascular health, pick Berberine.
- → If your priority is focus or working memory, pick Spermidine.
Edge case: Berberine is contraindicated in pregnancy; Spermidine is the safer pick if that applies.
Default choice: either is defensible. Berberine 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 Berberine and Spermidine?
Berberine 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, Berberine or Spermidine?
Berberine half-life is 3 hours; Spermidine half-life is 6 hours.
Can you stack Berberine 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