• Fitties FitRenew Collagen Generator supplement bottle on a white background
  • Fitties FitRenew supplement bottle with supplement facts on a white background
  • Fitties FitRenew supplement bottle with directions on a white background
  • Closeup of Fitties FitRenew bottle and capsules in hands
  • Closeup of bottle of Fitties FitRenew in a field
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FitRenew | Ultra-Premium Collagen Generator with ch-OSA® & Biotin

Drinkable collagen feeds your gut, not your face. Build your own instead.

$49.00
60 servings | $0.81/serving
    • ch-OSA helps your body build its own collagen, instead of just swallowing more
    • Clinically shown to support smoother skin, thicker hair, and stronger nails
    • Biotin for an extra layer of hair, skin, and nail support
    • Collagen runs deeper than skin: supports your bones, joints, and connective tissue too

FitRenew is a collagen generator that helps your body make its own collagen, elastin, and keratin, using clinically tested ch-OSA and biotin.

  • Built in the USA

  • Free Shipping

  • Satisfaction Guaranteed

Fitties FitRenew Collagen Generator supplement bottle on a white background
Fitties FitRenew supplement bottle with supplement facts on a white background
Fitties FitRenew supplement bottle with directions on a white background
Closeup of Fitties FitRenew bottle and capsules in hands
Closeup of bottle of Fitties FitRenew in a field

  • Molecular cycle icon indicating a collagen-related feature

    Collagen You Build, Not Buy

    Most collagen supplements are a protein shake for your face, and your gut digests them exactly like one.

  • Hair follicle icon indicating a hair-related feature

    Clinically Studied, Not Wishful

    In clinical trials, ch-OSA supported smoother skin, thicker hair, and stronger nails. Receipts, not promises.

  • Skin layer icon indicating a skin-related feature

    Biotin That Pulls Its Weight

    5,000mcg of biotin per capsule, the hair, skin, and nail nutrient. A real amount, not a sprinkle.

  • Joint and bone icon indicating a bone and joint-related feature

    Your Face Isn’t the Only Thing Made of This

    The silicon in ch-OSA supports the collagen your body builds everywhere, skin, hair, nails, and the connective tissue underneath.
Closeup of Fitties FitRenew bottle and capsules in hands

The Problem With Drinkable Collagen

Collagen powders sell a shortcut that your body doesn’t honor. Swallowed collagen gets broken down like any other protein, and almost none of it makes its way back to your skin as collagen. ch-OSA takes the long way that actually works: it delivers bioavailable silicon to the cells responsible for producing collagen, elastin, and keratin, then helps switch them on. The result is support for the proteins your skin, hair, and nails are genuinely made of, built from the inside instead of poured in from the top.

Who FitRenew Is For

Built for people who want their skin, hair, and nails supported from the inside out.

  • Who It’s For:

    • Anyone serious about skin, hair, and nails, especially if drinkable collagen never did much
    • People who want beauty support that goes deeper, into bones, joints, and connective tissue

  • Who It’s Not For:

    • Anyone expecting overnight results, since collagen support builds over months, not days
    • People who specifically want ingestible collagen peptides, not a collagen generator

What’s Inside

Two ingredients, both there to do a job. No filler list pretending to be a formula.

ch-OSA

Choline-stabilized orthosilicic acid: the clinically tested, highly absorbable form of silicon that helps switch on the cells that build your collagen. The whole reason FitRenew works.

Biotin

5,000mcg per capsule of the classic hair, skin, and nail nutrient, dosed to matter, not the trace amount hiding in your multivitamin.

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

Other ingredients include: capsule (hypromellose and water), microcrystalline cellulose, and purified water.

What to Expect From FitRenew

Beauty proteins are built, not rushed. Here’s the honest timeline, grounded in the research.

  • Clock icon for the first phase

    From Day 1

    One capsule twice a day. ch-OSA is absorbed and starts feeding the cells that make your collagen. Nothing to see yet, this is the groundwork.

  • Calendar icon for the second phase

    Months 2-9

    This is the window where ch-OSA’s studies measured smoother skin (around 20 weeks) and thicker, stronger hair (around 9 months). Consistency is the whole game.

  • Layered blocks icon for the third phase

    Ongoing

    Collagen production drops roughly 1% a year after your twenties, so ongoing support is the point, for your skin, hair, nails, and the structure underneath.
Athlete holding bottle of Fitties FitRenew outdoors

How to Use FitRenew

  • Take 1 capsule
  • Twice daily, with or without food

Every day. Collagen support only works if you actually keep at it. Whenever you’ll remember it, morning and night is easiest.

Pro Tip: Pair it with a protein habit. Collagen is built from amino acids, so the raw materials matter.

How FitRenew Compares

Most collagen supplements sell you collagen to swallow. FitRenew helps you make your own. That difference is the whole pitch.

Helps your body make its own collagen
Clinically studied ch-OSA
Clinically shown for skin, hair, and nails
Supports bones, joints, and connective tissue
Biotin included
Vegetarian and allergen-friendly
Fitties FitRenew Collagen Generator supplement bottle on a white background

FitRenew

FitRenew

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FitRenew

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What People Notice About FitRenew

4.86 ★ (409)
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Where FitRenew Fits Your Stack

FitRenew supports the collagen. Pair it with the raw materials and the foundation to back it up.

  • FitWhey+: protein gives your body the amino acids collagen is built from.
  • FitNutrients+: the daily vitamin and mineral foundation underneath it all.
  • FitProtect: cellular antioxidant support to round out the routine.
Find Your Stack

Frequently Asked Questions

What is ch-OSA and how does FitRenew work?

ch-OSA is choline-stabilized orthosilicic acid, a highly absorbable form of silicon. It helps activate the cells that produce your body’s own collagen, elastin, and keratin, the proteins behind healthy skin, hair, and nails.

How is this different from collagen powders and peptides?

Collagen powders give you collagen to digest, which your body breaks down like any other protein. FitRenew instead supports your body’s own collagen production, so you’re building it rather than just consuming it.

Is FitRenew clinically studied?

Yes. In clinical trials, ch-OSA was shown to support smoother skin, and thicker, stronger hair and nails. FitRenew provides 10mg of silicon as ch-OSA per day, the dose used in those studies.

How long until I notice results?

Beauty proteins build slowly. In studies, skin improvements appeared around 20 weeks and hair improvements around 9 months, so give it at least a few months of consistent daily use.

What is the biotin for?

Biotin is a well-known nutrient for hair, skin, and nail strength. FitRenew includes 5,000mcg per capsule to complement ch-OSA’s collagen support.

Does FitRenew support more than skin?

Collagen is also a major component of your bones, joints, and connective tissue. Alongside its beauty support, FitRenew helps support healthy bone mineral density and connective tissue.

Is FitRenew vegetarian and allergen-friendly?

Yes. FitRenew uses vegetarian capsules and is made without gluten, soy, dairy, corn, GMOs, and artificial additives.

How do I take FitRenew?

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

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.