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Ergothioneine:
The antioxidant your body was designed to keep.

A naturally occurring antioxidant found in mushrooms— and one of the few nutrients with its own dedicated transport system in the human body.

Meet
L-Ergothioneine (EGT)

King oyster mushroom, a natural source of ergothioneine

Naturally found in mushrooms.

Ergothioneine is a unique antioxidant naturally found in mushrooms and a handful of other foods.

But there's a catch:

Most foods contain only tiny amounts.

Reishi mushroom, one of the ergothioneine-rich fungi

One GeneIII® Capsule

The amount of EGT in 300–500g of reishi mushrooms

Illustration of the human brain, where ergothioneine accumulates

Brain

The blood-brain barrier blocks many compounds, but EGT has a dedicated transporter into the brain.

Close-up of healthy skin

Skin

Daily exposure to sunlight and the environment puts skin under constant stress.

Illustration of a human kidney

Kidneys

Continuous filtration puts kidney cells under constant demand.

Close-up of a human eye

Eyes

A lifetime of light exposure puts constant demands on eye cells.

Illustration of the human heart

Heart

Constant activity exposes heart cells to ongoing oxidative stress.

Illustration of the human liver

Liver

The liver’s role in metabolism makes it one of the body’s busiest organs.

Your body doesn’t treat it like other antioxidants.

Most antioxidants simply pass through the body.

Ergothioneine is different.

Your body has a dedicated transporter, called OCTN1, whose job is to actively absorb it into cells.



Other Compounds

No dedicated transport

EGT

Transported via OCTN1

OCTN1

transport system

Diagram of ergothioneine entering a cell via the OCTN1 transporter

Your body keeps it where it’s needed.

After it's absorbed, EGT builds up in parts of the body exposed to the most oxidative stress— including the brain, eyes, liver, skin, and kidneys.

Every day, your body faces oxidative stress.

Your body burns energy and encounters environmental stress every day. This creates unstable molecules that build up and cause wear and tear on your cells over time.

Much of this happens inside your mitochondria— the tiny engines that power every cell in your body.

metabolism

aging

UV exposure

physical activity

pollution

Illustration of a cell and its organelles
Illustration of a mitochondrion, the cell's energy producer

mitochondria

EGT works directly inside these engines to neutralize unstable molecules, helping protect your cells from the inside out.

From your cells to your health.

By helping protect cells from oxidative stress, EGT may support healthy brain function, sleep, energy production, liver health, and healthy aging.*

Watercolor illustration of a person running

ENERGY

Watercolor illustration of a person sleeping

SLEEP

Watercolor illustration highlighting the liver in the body

LIVER

Watercolor illustration of a person sitting and reading

COGNITIVE

Watercolor illustration of a person walking

HEALTHY AGING

GeneIII® EGT in Human Clinical Studies

Human clinical studies have evaluated GeneIII® EGT’s role in areas including energy, sleep quality, liver health, and reproductive health.

More Energy

+51% Daytime Energy






  • More energy throughout the day
  • Faster recovery
  • Better sleep quality

Women’s Health

+38% AMH






  • Hormonal balance
  • Ovarian support
  • Menstrual wellness

Liver Health

-20% Lower Liver Stress Markers






  • Liver support
  • Better recovery
  • Reduced fatigue
King oyster mushroom, a natural source of ergothioneine

Naturally found in mushrooms.

EGT is a unique antioxidant naturally found in mushrooms and a handful of other foods.

But there’s a catch:

Most foods contain only tiny amounts.

Diagram of ergothioneine entering a cell via the OCTN1 transporter

Your body doesn’t treat it like other antioxidants.

Your body keeps it where it’s needed most.

After it’s absorbed, EGT builds up in parts of the body exposed to the most oxidative stress— including the brain, eyes, liver, skin, and kidneys.

Close-up of healthy skin
Close-up of a human eye

Meet
L-Ergothioneine (EGT)

Other Compounds

No dedicated transporter

EGT

Transported via OCTN1

OCTN1

transport system

Every day, your body faces oxidative stress.

Your body burns energy and encounters environmental stress every day. This creates unstable molecules that build up and cause wear and tear on your cells over time.

Much of this happens inside your mitochondria— the tiny engines that power every cell in your body.

metabolism

aging

UV

exercise

pollution

From your cells to your health.

By helping protect cells from oxidative stress, EGT may help support healthy brain function, sleep, energy production, liver health, and healthy aging.*

GeneIII® EGT in
Human Clinical Studies

Human clinical studies have evaluated GeneIII EGT’s role in areas including energy, sleep quality, liver health, and reproductive health.

Woman running on a forest trail Person relaxing at home with a GeneIII supplement drink

More Energy

+51% Daytime Energy

  • More energy throughout the day
  • Faster recovery
  • Better sleep quality

Women’s Health

+38% AMH

  • Hormonal balance
  • Ovarian support
  • Menstrual wellness

Liver Health

-20% Lower Liver Stress Markers

  • Liver support
  • Better recovery
  • Reduced fatigue

Ergothioneine:
The antioxidant
your body was
designed to keep.

A naturally occurring antioxidant found in mushrooms— with its own dedicated transport system in the human body.

Watercolor illustration of a person running

ENERGY

Watercolor illustration of a person sleeping

SLEEP

Watercolor illustration highlighting the liver in the body

LIVER

Watercolor illustration of a person sitting and reading

COGNITIVE

Watercolor illustration of a person walking

HEALTHY AGING

Reishi mushroom, one of the ergothioneine-rich fungi

One GeneIII® Capsule

The amount of EGT in 300–500g of reishi mushrooms

Illustration of a cell and its organelles
Illustration of a mitochondrion, the cell's energy producer

EGT works directly inside these engines to neutralize unstable molecules, helping protect your cells from the inside out.

mitochondria

Most antioxidants simply pass through the body.

EGT is different.

Your body has a specific transporter, OCTN1, whose job is to actively carry and absorb EGT into cells.

GeneIII® L-Ergothioneine — 60 Capsules Shop Now
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