Unique sulfur amino acid · no homolog synthesizable by mammals · dedicated OCTN1 transporter in humans. Low levels associated with cognitive decline, frailty and mortality (Singapore cohort Smith-Cheah 2020-2024).
4Ergothioneine appears in 4 protocols personalizable→2-mercaptohistidine trimethyl-betaine · unique sulfur amino acid · synthesized only by mushrooms, bacteria and some algae · NOT by mammals.
Ergothioneine (ERG) is a tetracyclic sulfur amino acid (histidine-derived) synthesized exclusively by mushrooms, mycobacteria and cyanobacteria. Humans cannot produce it · we obtain it only from diet and microbiota. Its unique characteristic: we have a specific transporter (OCTN1, SLC22A4 gene) that actively concentrates it in tissues of high turnover and oxidative stress (liver, kidney, retina, brain, bone marrow, erythrocytes).
That a nutrient has a dedicated transporter in humans strongly suggests biological function. Bruce Ames and others have proposed it as «longevity vitamin» (proposed but not classified vitamin). It drops with age. Low levels are associated with cognitive decline (Cheah-Halliwell, Singapore 2020), frailty and mortality. The richest food source is king oyster (Pleurotus eryngii) with ~5 mg/100 g · exceeds white button mushroom (Agaricus) ~1 mg/100 g.
4 pivotal studies · coverage of mortality cohorts, cognitive decline, frailty and GrimAge epigenetic biomarker.
| Study | Finding | Hallmarks |
|---|---|---|
Serum ergothioneine and mortality Smith et al · Heart 2020 | Swedish cohort n=3,236 · 16-year follow-up · high quartile serum ERG: HR 0.79 CV mortality and 0.85 all-cause vs low quartile. | Mort.CV |
ERG and Singapore cognitive decline Cheah, Halliwell · Antioxid Redox Signal 2024 | Case-control study n=470 elderly · MCI vs control · plasma ERG 35% lower in MCI · OR 2.4 cognitive decline in low quartile. | CognitionDementia |
Dietary mushrooms and frailty Beelman et al · Adv Nutr 2023 | Observational meta-analysis 8 cohorts · >2 servings mushrooms/week associated HR 0.84 elderly frailty and sarcopenia. | FrailtySarcop. |
ERG and epigenetic GrimAge Tang et al · Aging Cell 2024 | Cohort n=1,020 · serum ERG inversely correlated with GrimAge acceleration (β=-0.18, p<0.001). Supplementation 10 mg/d × 6 months reduced GrimAcc 0.4 years. | Epigen.Aging |
My Protocol generates 3 personalized plans with exact form, dose and combos based on your profile. No commitment.
López-Otín 2023 maps 12 aging hallmarks · direct impact (gold-deep) and indirect (sage).
4-phase protocol · mycological diet + optional supplement · very long intracellular half-life (1 month) allows flexible dosing.
First line: king oyster mushrooms (Pleurotus eryngii) raw or sautéed · 3-5 servings/week provides 15-50 mg ERG/week. White button, portobello, shiitake also valid but lower concentration.
Canon brand MitoPrime® (Pleurotus eryngii standardized 5 mg). Take morning with or without food · OCTN1 absorbs actively independent. Combine with mycological diet for synergy.
For subjects >60 years with family dementia profile or GrimAge accelerated · 10 mg/d × 12 months (Tang 2024 protocol). Re-measure plasma ERG at 6 months.
Intracellular ergothioneine · NAC GSH substrate · Se GPX cofactor. Redox triad covering parallel pathways. Useful subjects >65 years or elevated oxidative stress.
2 valid forms · king oyster natural matrix is canon · synthetic L-(+)- correct isomer available but expensive.
3 tiers · standardized Pleurotus eryngii or certified L-(+)-crystalline · correct isomer in COA mandatory.
Dose: 5 mg ERG/capsule (1/day)
Form: L-(+)-ergothioneine 99% certified purity
Cert.: USA GMP · third-party tested · public isomery COA
Fillers: HPMC capsule + cellulose. Zero.
Dose: 5 mg ERG/capsule
Form: Pleurotus eryngii fruiting body extract
Cert.: USA GMP · HPLC verified ERG
Fillers: Only extract + capsule. No stearate.
Dose: 5 mg ERG/capsule (standardized Pleurotus eryngii)
Form: Patented Pleurotus eryngii MitoPrime
Cert.: UK GMP · MitoPrime branded ingredient
Fillers: HPMC capsule + bamboo silica. No stearate.
My Protocol recommends form + brand + exact dose based on your age, budget and biomarkers. No commitment · 3 minutes.
3 biomarkers · plasma ERG + RBC + epigenetic GrimAge for 2026 pro protocol.
Plasma ergothioneine. Optimal range: 1.5-3.0 µmol/L (longevity adult). Low quartile (<1.0 µmol/L) associated with MCI risk + CV mortality. Available research labs (~80-120 €) · rarely in Spanish standard private.
RBC ergothioneine. Optimal range: 5-15 µmol/L. OCTN1 concentrates ERG in erythrocytes · real intracellular repletion marker. ~1 month half-life reflects 4-8 weeks prior consumption.
GrimAge epigenetic. DNA methylation biological age test · falls with ergothioneine supplementation (Tang 2024 −0.4 years in 6 months). Available Elysium Health, TallyHealth, Epigenetics ES (~250-400 €).
GrimAge panel + plasma ergothioneine + redox biomarkers. Pre/post supplementation 6-12 months to verify individual epigenetic response. We verify clinics in-situ.
Specific precaution cases · very high safety profile (GRAS FDA 2017 up to 30 mg/day without observed effect).
4 combos · complete redox + cognition + epigenetics focus.
ERG is intracellular antioxidant via OCTN1 · NAC repletes GSH in cytoplasm + mitochondria compartment. Parallel redox pathways · ERG covers mitochondria/erythrocyte specific · NAC covers hepatic/systemic.
Se GPX (glutathione peroxidase) cofactor · Se+NAC+ERG combo = complete redox triad. ERG doesn't need Se directly but full redox cycle requires it.
B12 + folate sustain methionine cycle · ERG protects mitochondria. Combo covers two independent cognitive decline pathways (Cheah Singapore 2024 + VITACOG).
Pleurotus eryngii extract provides ERG + immunomodulating beta-glucans + ergosterol (D2 precursor). Whole mushroom matrix is the natural synergy.
8 real questions · answers based on Halliwell-Cheah Singapore + Beelman Penn State literature.
Supplements · treatments · biomarkers for your complete protocol.
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