an image of a close up of a person's face and a woman's face

Your Eyes Need Antioxidants - Here's Why It Matters Now

Your eyes work harder than almost any other tissue in the body.

From the moment you wake up, they're constantly on duty - focusing, refocusing, adjusting to changing light, and interpreting millions of details every second.

But this constant demand comes with a cost. Every time light enters the eye and every time your cells use oxygen to produce energy, tiny unstable molecules called free radicals are created.

Normally, your body's defences keep these molecules in check. When they accumulate faster than your defences can handle, they cause "internal rust" called oxidative stress.

The eyes, especially the retina and macula, contain highly active, sensitive tissues vital for clear vision. Without balanced oxidative stress, damage accumulates over time, affecting glare tolerance, low-light clarity, and comfort after screen use. Though initially unnoticed, this stress gradually alters your vision.

Why the Retina Needs Extra Protection

The retina sits at the back of the eye, converting light into electrical signals that your brain turns into vision.

It's an active, highly metabolic tissue layer that works constantly when your eyes are open. Cells in the retina (rods and cones) detect light and trigger reactions, generating electrical impulses that travel along the optic nerve to the brain, where they're processed into images.

The retina consumes enormous amounts of oxygen and nutrients because of its energy-intensive processes. It contains high levels of polyunsaturated fats, essential for vision, but prone to damage. This combination makes the retina highly vulnerable to oxidative damage.

This vulnerability mainly affects the macula, the retina's central part responsible for:

Sharp detail (reading, recognising faces, fine tasks)
Contrast sensitivity (distinguishing objects from backgrounds)
Colour perception (seeing rich, accurate colours)

Oxidative stress happens when free radicals outpace the eye's defences, gradually damaging retinal cells, disrupting function, and weakening the macula's structure. This leads to slow declines in vision and resilience before symptoms appear.

That's where antioxidants come in.

How Antioxidants Support Visual Resilience

Antioxidants serve as the eye's internal defence, neutralising free radicals from light exposure and metabolism. These unstable molecules can harm retinal cells, including photoreceptors that convert light into visual signals.

Key eye-protective antioxidants preserve the retina and macula by:

Reducing oxidative stress and maintaining macular pigment density, which filters harmful blue light like natural sunglasses
Supporting cellular repair and regenerating damaged structures over time

As natural defences decline with age and exposure to sunlight, screens, and pollutants increase, antioxidants become more important. By supporting cellular repair and protecting against cumulative damage, they boost visual resilience, keeping eyes healthier and functioning longer.

“The human body protects itself by accumulating high levels of protective antioxidants in the retina ... help to shield your sharp central vision from oxidative damage.”

PROFESSOR MARCUS FRUTTIGER

UCL & MOORFIELDS EYE HOSPITAL

CO-FOUNDER AT MTHK

Key Antioxidants Your Eyes Actually Use

Lutein and Zeaxanthin - deep red and orange landscape

LUTEIN & ZEAXANTHIN

These carotenoids are concentrated in the macula of the retina, responsible for sharp central vision. They form part of the macular pigment, which provides structural support and protection for visual performance.

Together they:

Filter high-energy (blue) light like internal "sunglasses," reducing glare and preventing damage
Support contrast sensitivity, aiding object distinction in low light or haze
Help protect retinal cells by neutralising free radicals and oxidative stress from constant light exposure and metabolic activity

Lutein and Zeaxanthin are found in leafy greens, eggs, and colourful vegetables - but diet often doesn't provide enough, especially for those with limited vegetables or high visual demands.

Consistent intake over time is essential for maintaining macular pigment and eye health.

ERGOTHIONEINE

Identified through pioneering research led by Professor Marcus Fruttiger (Co-Founder at MTHK), Ergothioneine is a uniquely stable antioxidant that the body actively transports to tissues under high oxidative stress - including the retina.

Unlike many antioxidants, Ergothioneine:

Accumulates where it's needed most
Remains stable over time
Supports long-term cellular protection

In the eye, the retina is constantly exposed to light and high levels of oxygen, which generate harmful free radicals. Ergothioneine helps neutralise these free radicals, supporting the resilience of retinal cells and protecting delicate cell structures over time.

Because it is stable and stored in tissues, Ergothioneine may offer a more sustained antioxidant effect than others that break down quickly. This longevity makes it increasingly interesting for maintaining eye health as we age.