Comparison
Berberine vs Nicotinamide Riboside
Side-by-side of Berberine and Nicotinamide Riboside. 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.
Nicotinamide Riboside
Nicotinamide riboside (NR) is the most-studied NAD+ precursor in humans. Sold as Niagen by Chromadex; raises plasma NAD+ 30-60% at 250-1,000 mg/day.
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
Nicotinamide Riboside
- •Most-studied NAD+ precursor in human trials; the original Niagen formulation by Chromadex
- •Plasma NAD+ rises 30-60% at 250-1,000 mg/day across multiple human PK trials
- •Martens 2018 reported reduced BP and arterial stiffness at 500 mg/day for 6 weeks
- •Dollerup 2018 found no insulin sensitivity change despite plasma NAD+ rise
- •Tissue NAD+ rise inconsistent; hard clinical endpoints not yet measured
- •Larger human safety database than NMN; comparable mechanistic effects
Side-by-side
| Attribute | Berberine | Nicotinamide Riboside |
|---|---|---|
| Category | natural | supplement |
| Also known as | berberine HCl, berberine hydrochloride | NR, Niagen, nicotinamide riboside chloride |
| Half-life (hr) ↗ | 3 | 8 |
| Typical dose (mg) ↗ | 1500 | 500 |
| Dosing frequency | 3x daily with meals | daily, typically morning |
| Routes | oral | oral |
| Onset (hr) | 2 | 1 |
| Peak (hr) | 3 | 4 |
| Molecular weight | 336.36 | 255.25 |
| Molecular formula | C20H18NO4+ | C11H15N2O5 |
| 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. | NAD+ precursor via salvage pathway. Phosphorylated to NMN by nicotinamide riboside kinase (NRK), then converted to NAD+. Substrate for sirtuins, PARPs, and CD38. |
| Legal status | Dietary supplement (US, EU, UK, Canada); Rx in some Asian jurisdictions | OTC dietary supplement |
| WADA status | allowed | allowed |
| DEA / Rx | Not scheduled | OTC supplement |
| Pregnancy | Contraindicated (kernicterus risk in neonates) | Insufficient data at supplement doses |
| CAS | 2086-83-1 | 1341-23-7 |
| PubChem CID | 2353 | 439924 |
| Wikidata | Q411435 | Q3343054 |
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)
Nicotinamide Riboside
Common side effects
- mild GI upset (rare)
- headache (rare)
Contraindications
- pregnancy / lactation (insufficient data)
- active cancer (theoretical, no contraindicating data)
Interactions
- pterostilbene: complementary sirtuin pathway (Basis combination)(minor)
- TMG (trimethylglycine): methylation support during high NAD+ precursor dosing(minor)
Which Should You Take?
Nicotinamide Riboside comes out ahead for most readers on the criteria we weight: 3 catalogued goals, OTC dietary supplement, oral dosing, with a Tier-A outcome catalogued. Berberine is the right call when one of the conditionals below applies.
- → If your priority is cardiovascular health, pick Berberine.
- → If your priority is energy and stamina, pick Nicotinamide Riboside.
- → If your priority is metabolic health and glucose control, pick Nicotinamide Riboside.
Edge case: Berberine is contraindicated in pregnancy; Nicotinamide Riboside is the safer pick if that applies.
Default choice: Nicotinamide Riboside. Lower friction to source, a Tier-A evidence outcome catalogued, and broader goal coverage. Reach for Berberine only if your priority sits squarely in the goals it owns 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 Nicotinamide Riboside?
Berberine and Nicotinamide Riboside 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 Nicotinamide Riboside?
Berberine half-life is 3 hours; Nicotinamide Riboside half-life is 8 hours.
Can you stack Berberine with Nicotinamide Riboside?
Stack compatibility depends on mechanism overlap, legal status, and individual response. Check each compound page for specific interactions and contraindications before combining.
Go deeper