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Bottle of Fitties FitRenew
Rated 4.8 out of 5


Natural Collagen Production with ch-OSA® and Biotin

FitRenew features clinically tested ch-OSA® (choline-stabilized orthosilicic acid) complemented with biotin. ch-OSA naturally helps nourish your body’s beauty proteins by supporting and activating enzymes used by collagen-generating cells to make collagen. Regular orthosilicic acid (OSA) has to be stabilized to avoid polymerization, a process that decreases bioavailability. ch-OSA’s patented choline-stabilization technology prevents polymers from forming and ensures OSA’s optimal absorption. By combining ch-OSA with biotin, FitRenew offers an even greater level of beauty support.

/ 60 Capsules

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Biotin (mcg)


Choline (mg)


Silicon (mg)


Developed by Health & Fitness Experts

Formulated by Medical Pros

Manufactured in CGMP Facilities

100% Medical-Grade Ingredients

Proven Results via Clinical Trials

Male smiling at reflection in mirror
Capsule (hypromellose and water), microcrystalline cellulose, and purified water.
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.
Take one (1) capsule twice daily, or use as directed by your healthcare professional.
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Enhance Your Beauty from Within

FitRenew is a powerful blend of clinically tested ch-OSA® (choline-stabilized orthosilicic acid) and biotin, designed to boost your beauty from within. This unique formula supports collagen production, strengthens hair and nails, and promotes joint and bone health for a radiant you.
Closeup of collagen powder and capsules

Optimal Absorption with ch-OSA®

FitRenew features patented choline-stabilized orthosilicic acid (ch-OSA®) for optimal absorption, ensuring that the essential element silicon effectively contributes to your connective tissue health and collagen formation.

Nourish Your Beauty Proteins

ch-OSA helps nourish the body’s beauty proteins—collagen, elastin, and keratin—crucial for skin strength, elasticity, and overall structure. Choline in ch-OSA activates pathways involved in collagen production, promoting keratin and elastin formation for a youthful appearance.
Female performing standing alternating dumbbell curls

Proven Results in Clinical Studies

FitRenew’s efficacy is backed by clinical studies. Oral intake of 10 mg/d silicon as ch-OSA improved skin properties, strengthened hair and nails, enhanced hair tensile strength and thickness, and increased thighbone mineral density, ensuring comprehensive beauty support.
Female performing light weight dumbbell bicep curl

Experience the Benefits of Biotin

Biotin plays a vital role in maintaining health and boosting beauty. FitRenew’s biotin supplementation supports healthy hair growth, skin health, and hair and nail strength, contributing to your overall well-being and radiance.
Male performing clean and jerk movement

Firmer, Stronger Nails

FitRenew, with biotin, improves nail thickness and reduces splitting, resulting in firmer and harder fingernails. Embrace the confidence that comes with strong, healthy nails as you make FitRenew a part of your daily beauty regimen.

We Use Only the Finest Patented Ingredients

Buy with Confidence: Fitties' Unwavering Commitment to Your Satisfaction​

At Fitties, your happiness and satisfaction form the core of our mission, underscored by our comprehensive Fitties Satisfaction Guarantee. Regardless of whether you’re a first-time or repeat customer, rest assured knowing we’ve got your back. Our dedication to a hassle-free experience guarantees your peace of mind while shopping with us.

Frequently Purchased with FitRenew

It's our mission to improve human performance, starting from the inside out.

Customer Reviews for ​FitRenew

4.8 out of 5 stars (based on 5 reviews)

Noticeable improvement in hair, skin and nails

June 11, 2023

FitRenew has worked well for improving my hair, skin and nails so far. I’ve noticed some improvements and plan to keep taking it. Easier that mixing collagen powders.

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Josephine Hayes

Better hair and nails!

April 21, 2023

Great supplement. My nails have become so much stronger and my hair has never looked better.

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Linda Perry

Better hair!

April 15, 2023

FitRenew has worked wonders for my hair. It’s thicker and healthier than ever before and I’ve even noticed fewer fine lines and wrinkles on my face. Ingredients are among the best quality I’ve seen.

Avatar for Aubrey Brooks
Aubrey Brooks

Amazing results

April 14, 2023

I started using FitRenew for my nails and I’ve been amazed by the results. My nails are now stronger and don’t break as easily. I highly recommend this product.

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Alexis Powell

Healthier hair and more

April 13, 2023

FitRenew has made a noticeable difference in my hair and nails. My hair especially just feels healthier and younger.

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Zoey Mitchell

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