About GeneIII

Clinical-Grade L-Ergothioneine for Healthy Aging

Our Vision

At GeneIII, we’re on a mission to support long-term health and healthy aging by delivering clinically backed, ultra‑pure L‑Ergothioneine that helps your body protect, repair, and renew at the cellular level.

GeneIII warehouse facility where L-Ergothioneine supplements are stored and shipped with care

Our Story

Founded in 2021, GeneIII emerged to make next‑generation wellness accessible. We pioneered a patented, sustainable fermentation process to produce 99.99% pure L‑Ergothioneine—a rare antioxidant studied for its role in cognition, liver health, and longevity.

Certificate of Appointment issued by GeneIII to Barry Halliwell as Senior Specialist in Ergothioneine Clinical Research, April 2025

Science Meets Quality

We’re one of the only brands offering IIT‑backed L‑Ergothioneine, supported by “Investigator-Initiated Trials.”

Our products are manufactured in cGMP‑certified U.S. facilities and reflect rigorous quality standards.

We collaborate with global experts like Professor Barry Halliwell, the pioneering scientist in L‑Ergothioneine research.

See the Science

Elevating Healthy Aging With L-Ergothioneine

Developed by a dedicated team of scientists and clinicians, GeneIII offers a new category of cellular nutrition. Our L-Ergothioneine supports mitochondrial health, protects against oxidative stress, and promotes resilience as you age.

Trusted Quality You Can Count On

  • 99.99% pure, biotech-grade antioxidant

  • Third-party tested for purity and safety

  • Manufactured in compliant facilities

  • Backed by clinical research and expertise
Scientists conducting antioxidant research – GeneIII L-Ergothioneine supplement backed by science

Our Commitment to You

We believe in evidence-based wellness that begins at the cellular level. With GeneIII, you get science you can trust and a foundation for longevity you can feel.

Explore the science behind our signature antioxidant:

Discover the ScienceShop GeneIII L-Ergothioneine