Lose the weight. Keep the strength.
Weight loss doesn't always mean fat loss. RETAIN is a daily muscle preservation formula built to support strength and muscle while the weight comes off.*
Shop RETAINNot everything you lose is something you wanted to.
The scale tells you how much weight you've lost. It doesn't tell you what you've lost.
Weight loss can include muscle, too. And muscle matters for more than strength. It contributes to your body's shape, how you move, and what you're able to do as you age.
When you're working toward a healthier body, it's worth paying attention to what you want to keep.
Weight loss focuses on what you're trying to lose. We started with what you want to keep.
GLYM wasn't created to help you lose more weight. It was created because what you keep during weight loss matters, too.
Protein and resistance training remain foundational. RETAIN is designed to complement those efforts with purposeful daily support.*
Purpose-built for muscle preservation.* More than creatine alone.
Creatine is one of the most researched ingredients for strength and muscle support. But RETAIN wasn't developed as just another creatine supplement.
We brought together five functional ingredient groups, each selected for a specific role in supporting muscle, connective tissue, or hydration.*
Five functional ingredient groups. Fully disclosed doses. One daily scoop.
Creatine Monohydrate
5 g
Strength and muscle support.*
Supports cellular energy in muscle.*
Hydrolyzed Collagen Peptides
5 g
Grass-fed, bovine-sourced.
Connective tissue, skin, and joint support.*
Electrolytes
Sodium · Potassium · Magnesium
Hydration and muscle contraction.*
Vitamin C
250 mg
Required for collagen synthesis.*
Glycine
500 mg
One of the amino acids in collagen.
Unflavored. No sweeteners. No proprietary blends.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
What one scoop replaces.
You can buy these ingredients separately. RETAIN brings them together in one thoughtfully formulated product, with disclosed doses and a simple daily routine.
No juggling multiple containers. No piecing together your own formula.
| Per day | RETAIN | Bought separately |
|---|---|---|
| Creatine monohydrate, 5g | ✓ | Own tub |
| Hydrolyzed collagen peptides, 5g | ✓ | Own tub |
| Electrolytes: sodium 400mg, potassium 220mg, magnesium 60mg | ✓ | Own packets |
| Vitamin C, 250mg | ✓ | Own bottle |
| Glycine, 500mg | ✓ | Own bag |
| Containers to buy and reorder | 1 | 5 |
| Doses chosen and disclosed for you | ✓ | Five products to research and dose yourself |
You shouldn't have to take our word for it.
We believe transparency should go beyond the ingredient label.
RETAIN is independently tested, with fully disclosed ingredient amounts and testing information you can review for yourself.
No proprietary blends. No mystery doses.
Lot 2604090
Tested by Light Labs, ISO/IEC 17025 accredited
Creatine content · Heavy metals
I knew the science. I wasn't applying it to myself.
When I started losing weight, I was focused on the progress I could see. What I wasn't paying enough attention to was what I might be losing alongside it.
My background in biology (human physiology) and research meant I understood the importance of muscle. But knowing the science and applying it to your own life are two different things.
That realization led me to create GLYM — and RETAIN, the formula I built for my own muscle.
Morgan Crawley
Founder, GLYM Nutrition
You didn't start this to lose muscle.
Make muscle part of the plan.
RETAIN™ — Muscle Preservation Formula*
One daily scoop. Five functional ingredient groups. Unflavored and unsweetened.
Founding price through November 30, 2026. Retail is $80 after. Free shipping included.
Shop RETAINOr subscribe at $62 a month. Cancel or change anytime before your next shipment.
30-day money-back guarantee on your first order, even if you've opened it. See the policy.
Questions about ingredients, how to take it, or shipping? Read the FAQ.