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  • Fitties FitProtect supplement bottle with supplement facts label on a white background
  • Fitties FitProtect supplement bottle with directions on a white background
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FitProtect | Ultra-Premium Cellular Antioxidant with MitoPrime® L-Ergothioneine

Most antioxidants pass right through you. Your cells actually hold onto this one.

$39.00
30 servings | $1.30/serving
    • MitoPrime L-ergothioneine, fighting oxidative stress inside your cells where the damage actually starts
    • Supports cognitive and neurologic health as the years add up
    • Helps maintain healthy glutathione, your cells’ own built-in antioxidant defense

FitProtect is a cellular antioxidant built on MitoPrime L-ergothioneine, a rare amino acid your body can’t make but your cells rely on to fight oxidative stress.

  • Built in the USA

  • Free Shipping

  • Satisfaction Guaranteed

Fitties FitProtect supplement bottle on a white background
Fitties FitProtect supplement bottle with supplement facts label on a white background
Fitties FitProtect supplement bottle with directions on a white background
Closeup of Fitties FitProtect on outdoor table
Female athlete holding bottle of Fitties FitProtect outdoors

  • Shield icon indicating an antioxidant-related feature of this dietary supplement

    The Antioxidant You Can’t Make

    Your body makes every antioxidant it needs but this one. It comes only from food, and most people fall short.

  • Brain icon indicating a cognitive-related feature of this dietary supplement

    Your Cells Actually Keep It

    Most antioxidants wash out in hours. Your body has a transporter that pulls this one into cells and holds it.

  • Gauge icon indicating a glutathione-related feature

    Protection Where It Counts

    It fights oxidative stress inside your cells, supports cognitive health, and helps maintain healthy glutathione.

  • Laboratory flask icon indicating dietary supplement formulation and ingredient quality focus

    Not Another Antioxidant Blend

    Cheap blends lean on antioxidants your body excretes. MitoPrime is 99% pure and clinically studied.
Female athlete holding bottle of Fitties FitProtect outdoors

Most Antioxidants Are a Waste of Money.

Here’s the uncomfortable truth about the antioxidant aisle: your body treats most of what’s in it as something to flush, not keep. L-ergothioneine is the rare exception it actually holds onto, accumulating in the cells, organs, and tissues most exposed to oxidative stress. Because you can’t produce it and the average diet runs low, supplementing is the practical way to keep your levels up, especially since they decline with age. FitProtect uses MitoPrime, a 99% pure form, to do exactly that, one capsule at a time.

Who FitProtect Is For

Built for people who think about their health in decades, not weeks.

  • Who It’s For:

    • Anyone focused on long-term cellular health, cognitive function, and healthy aging
    • People who rarely eat mushrooms and are likely running low on ergothioneine

  • Who It’s Not For:

    • Anyone after a stimulant or a buzz, since a cellular antioxidant is a long game you won’t feel
    • People who already eat a mushroom-heavy diet and may get plenty from food

What’s Inside

One ingredient, because the right one doesn’t need a supporting cast to hide behind.

MitoPrime L-Ergothioneine

A 99% pure, fermentation-made form of L-ergothioneine, the rare antioxidant amino acid your body can’t produce and your cells actively hold onto. 12.5mg per capsule.

Formulated to exclude: wheat, gluten, corn, yeast, soy, animal and dairy products, fish, shellfish, peanuts, tree nuts, egg, sesame, ingredients derived from genetically modified organisms (GMOs), artificial colors, artificial sweeteners, and artificial preservatives.

Other ingredients include: microcrystalline cellulose, dicalcium phosphate, capsule (hypromellose and water), ascorbyl palmitate, and silica.

What to Expect From FitProtect

A cellular antioxidant is a long game, not a buzz. Here’s the honest version, grounded in the research.

  • Clock icon for the first phase

    From Day 1

    A capsule is absorbed and pulled into your cells by L-ergothioneine’s dedicated transporter. Levels start climbing from the first dose. You won’t feel it, and that’s exactly how a cellular antioxidant works.

  • Calendar icon for the second phase

    Weeks 1-4

    In studies, steady supplementation raised blood and cellular ergothioneine levels, rebuilding what a low-mushroom diet and age quietly drain.

  • Layered blocks icon for the third phase

    Ongoing

    Ergothioneine is used up daily and falls with age, so the point is to keep your cells stocked. Long-term, that’s consistent antioxidant support where it matters most, inside the cell.
Closeup of Fitties FitProtect on outdoor table

How to Use FitProtect

  • Take 1 capsule
  • Once or twice daily, with or without food

Every day. Cellular levels build and hold only with consistent use. Any time of day works, with or without a meal.

Pro Tip: Pair it with a diet light on mushrooms and you’re covering an everyday gap most people don’t know they have.

How FitProtect Compares

Most antioxidant supplements are cheap vitamins your body flushes in hours. FitProtect is the rare one your cells are built to absorb and keep. Not the same category.

L-ergothioneine your body can’t make
Absorbed by a dedicated cellular transporter
99% pure, clinically studied MitoPrime
Supports cognitive health and glutathione
Vegetarian and allergen-friendly
Fitties FitProtect supplement bottle on a white background

FitProtect

FitProtect

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FitProtect

Typical Antioxidant Supplements

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What People Notice About FitProtect

4.86 ★ (409)
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Where FitProtect Fits Your Stack

FitProtect covers cellular defense. Pair it with the foundation and the rest of your long-game lineup.

  • FitNutrients+: the daily vitamin and mineral foundation under everything.
  • FitNeuro: targeted support for memory and cognition to go with the cellular angle.
  • FitRenew: cellular support for skin, hair, and the structure underneath.
Find Your Stack

Frequently Asked Questions

What is L-ergothioneine?

L-ergothioneine is a naturally occurring antioxidant amino acid, derived from histidine, that your body can’t produce. It comes from diet, mostly mushrooms, and accumulates in your cells, where it helps protect against oxidative stress.

What is MitoPrime?

MitoPrime is a 99% pure form of L-ergothioneine made through a fermentation-based process. It’s a clinically studied ingredient with high cellular bioavailability. FitProtect provides 12.5mg per capsule.

Why supplement if it’s in food?

Your body can’t make L-ergothioneine, mushrooms are the main dietary source, and average intake is low, especially in the US. Levels also decline with age, so supplementing is a practical way to keep them up.

What does FitProtect actually do?

L-ergothioneine provides cellular antioxidant support, helping fight oxidative stress inside your cells. It also supports cognitive and neurologic health and helps maintain healthy glutathione levels.

Will I feel anything?

Probably not, and that’s normal. L-ergothioneine works at the cellular level over time, like most antioxidants, so its value is in long-term cellular support rather than an immediate sensation.

How is it different from vitamin C or other antioxidants?

Most antioxidants are cleared from the body within hours. L-ergothioneine is taken up by a dedicated cellular transporter and retained in your tissues, so your cells hold onto it rather than flushing it out.

How much should I take?

Take one capsule once or twice daily, providing 12.5 to 25mg, with or without food. If you take medication or have a health condition, check with your healthcare provider first.

Is FitProtect vegetarian and allergen-friendly?

Yes. FitProtect uses a vegetarian capsule and is made without gluten, soy, dairy, corn, sesame, GMOs, and artificial additives.

Can I stack Fitties products together?

Yes. All Fitties supplements are formulated with complementary ingredient profiles, so they can be used as part of the same daily routine. If you want a ready-made stack, our curated bundles pair the right products for strength, performance, recovery, and overall health so you don't have to guess.

Are Fitties products third-party tested?

Yes. Every Fitties formula goes through independent third-party testing to verify purity, potency, and identity before it ever reaches your hands. No hidden extras. No low-grade shortcuts. Just ultra-premium, research-backed ingredients that are formulated to match exactly what the label says.

Where are Fitties products made?

All Fitties supplements are manufactured in the USA in cGMP-certified, FDA-registered facilities. We don’t outsource quality. We build everything to the highest standard because your health and performance deserve nothing less.

Are Fitties supplements vegan, gluten-free, or allergen-friendly?

Each product is different, and we call out all dietary details clearly on every product page. Many formulas are vegan, gluten-free, dairy-free, or soy-free, and we never use artificial dyes or cheap fillers. If something doesn’t fit your dietary needs, you’ll know upfront.

What Real Users Are Saying

Reviews from athletes and high performers who expect to get what they pay for in their supplements.