Understand the source comparison
Best Peptides for Heavy Metal Detox: Research Comparison
N-Acetylcysteine (NAC) Increases intracellular glutathione synthesis by providing rate-limiting cysteine substrate Oral. Absorbed intact, crosses BBB 600–1200mg twice daily Mercury, lead, cadmium (via GSH conjugation) Gold standard glutathione precursor. 35–50
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This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- N-Acetylcysteine (NAC)
- Increases intracellular glutathione synthesis by providing rate-limiting cysteine substrate
- Oral. Absorbed intact, crosses BBB
- 600–1200mg twice daily
- Mercury, lead, cadmium (via GSH conjugation)
- Gold standard glutathione precursor. 35–50% intracellular GSH increase consistently demonstrated in clinical trials. Pair with ALA for synergistic effect.
- Zinc-Methionine Complex
- Upregulates metallothionein (MT) synthesis; zinc primes MT gene transcription via MTF-1
- Oral. Peptide-bound zinc resists intestinal precipitation
- 30–50mg elemental zinc daily for 14–21 days
- Cadmium, mercury, lead (via MT binding)
- Essential priming step before chelation. Without adequate MT expression, chelation mobilises metals without binding capacity. Monitor plasma zinc to avoid copper depletion.
- Alpha-Lipoic Acid (ALA)
- Direct chelation via dithiol groups; regenerates oxidised glutathione (GSSG → GSH)
- Oral. Rapidly absorbed, crosses BBB and mitochondrial membranes
- 300–600mg daily in divided doses
- Mercury, arsenic, lead
- Dual mechanism. Chelates metals and recycles glutathione. Time-release formulations reduce GI side effects. Contraindicated in active mercury amalgam removal (redistributes mercury).
- Reduced L-Glutathione (GSH)
- Conjugates heavy metals for MRP2 transporter-mediated export; primary Phase II detox cofactor
- Oral bioavailability poor (12% plasma increase); liposomal forms moderately better
- 500–1000mg daily (liposomal preferred)
- Mercury, lead, cadmium (non-specific thiol binding)
- Precursors (NAC) outperform direct supplementation for intracellular GSH. Consider IV glutathione for acute metal poisoning only under medical supervision.
- Carnosine (Beta-Alanyl-L-Histidine)
- Chelates copper/zinc to prevent mitochondrial oxidative damage; scavenges reactive carbonyls
- Oral. Absorbed as intact dipeptide
- 500–1000mg daily
- Copper, zinc (prevents pro-oxidant catalysis)
- Mitochondrial-protective rather than chelating. Supports ATP synthesis required for metal export. Synergistic with CoQ10 for electron transport support.
- DMSA (Dimercaptosuccinic Acid)
- Forms stable complexes with divalent metals via dual thiol groups; increases urinary excretion
- Oral. 20–50% absorbed, renally cleared
- 10–30mg/kg/day in divided doses (medical supervision required)
- Lead, mercury, arsenic
- Prescription chelator. Not a peptide but often compared. Requires zinc/MT priming and glutathione support to prevent redistribution. Contraindicated in renal impairment.