Comparison
Berberine vs Magnesium Glycinate
Side-by-side of Berberine and Magnesium Glycinate. 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.
Magnesium Glycinate
Magnesium glycinate supplement guide: chelated bisglycinate form, 200 to 400 mg dosage, sleep architecture benefits, low GI side effects, glycine co-effect.
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
Magnesium Glycinate
- •Shortens sleep onset latency in older adults and in deficient populations supplementing 200 to 400 mg elemental Mg
- •Improves subjective sleep quality scores (PSQI, ISI) modestly versus placebo over 4 to 8 weeks
- •Reduces nocturnal leg cramps and exercise-induced muscle cramping in some controlled trials
- •Lowers self-reported anxiety in mild-to-moderate cases, with smaller effect than first-line pharmacotherapy
- •Glycinate form delivers fewer GI side effects than oxide or citrate at equivalent elemental doses
- •Insufficient as a stand-alone hypertension treatment; small adjunctive blood-pressure reductions only
Side-by-side
| Attribute | Berberine | Magnesium Glycinate |
|---|---|---|
| Category | natural | supplement |
| Also known as | berberine HCl, berberine hydrochloride | magnesium bisglycinate |
| Half-life (hr) ↗ | 3 | 5 |
| Typical dose (mg) ↗ | 1500 | 300 |
| Dosing frequency | 3x daily with meals | daily (often evening) |
| Routes | oral | oral |
| Onset (hr) | 2 | 1 |
| Peak (hr) | 3 | - |
| Molecular weight | 336.36 | - |
| Molecular formula | C20H18NO4+ | - |
| 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. | Magnesium acts as a cofactor for 300+ enzymes and as a voltage-dependent antagonist at NMDA receptors; glycine serves as an inhibitory neurotransmitter and co-agonist at glycine receptors. |
| Legal status | Dietary supplement (US, EU, UK, Canada); Rx in some Asian jurisdictions | Dietary supplement |
| WADA status | allowed | allowed |
| DEA / Rx | Not scheduled | OTC supplement |
| Pregnancy | Contraindicated (kernicterus risk in neonates) | Generally considered acceptable at RDA doses; consult clinician |
| CAS | 2086-83-1 | 14783-68-7 |
| PubChem CID | 2353 | 84645 |
| Wikidata | Q411435 | - |
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)
Magnesium Glycinate
Common side effects
- mild GI upset at high doses
- loose stools (dose-dependent, less than with oxide/citrate forms)
Contraindications
- severe renal impairment
- myasthenia gravis
- heart block
Interactions
- tetracycline and fluoroquinolone antibiotics: magnesium chelates antibiotic, reducing absorption; separate by 2+ hours(moderate)
- bisphosphonates: reduced absorption of bisphosphonate(moderate)
- potassium-sparing diuretics: possible hypermagnesemia in renal impairment(moderate)
Which Should You Take?
Magnesium Glycinate 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 metabolic health and glucose control, pick Berberine.
- → If your priority is healthspan extension, pick Berberine.
- → If your priority is sleep onset or sleep quality, pick Magnesium Glycinate.
- → If your priority is post-training recovery, pick Magnesium Glycinate.
Edge case: Berberine is contraindicated in pregnancy; Magnesium Glycinate is the safer pick if that applies.
Default choice: Magnesium Glycinate. 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 Magnesium Glycinate?
Berberine and Magnesium Glycinate 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 Magnesium Glycinate?
Berberine half-life is 3 hours; Magnesium Glycinate half-life is 5 hours.
Can you stack Berberine with Magnesium Glycinate?
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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