RETAIN
RETAIN
Muscle Preservation Formula*
Lose the weight. Keep the strength.
Purpose-built for muscle preservation during weight loss, RETAIN brings together five functional ingredient groups in one daily formula to support strength, muscle, connective tissue, and hydration.*
30 servings · One daily scoop
Unflavored · Fully disclosed doses · Third-party tested
Founding price available through November 30, 2026. Retail price thereafter: $80 one-time, $72/month subscription.
Free shipping on founding orders.
30-day money-back guarantee on your first order, even if opened. See the policy
Cancel or change anytime before your next shipment.
In stock and shipping. Orders typically ship within 1–2 business days.
More than creatine. Built around what matters to keep.
Creatine is one of the most researched ingredients for strength and muscle support. It's an important part of RETAIN — but it isn't the whole formula.*
We developed RETAIN specifically for the priorities that come with weight loss, combining creatine with hydrolyzed collagen peptides, electrolytes, vitamin C, and glycine.
Each ingredient group has a distinct role, from strength and muscle support to connective tissue, hydration, and collagen synthesis.*
The goal isn't just to lose weight. It's to pay attention to what you're keeping along the way.
Every ingredient has a reason.
Five functional ingredient groups. Fully disclosed doses. No proprietary blends.
Creatine Monohydrate — 5 g
Strength and muscle support.*
Supports cellular energy in muscle.*
This is energy at the cellular level in muscle, not a stimulant.
A full 5 g daily serving of creatine monohydrate.
Hydrolyzed Collagen Peptides — 5 g
Connective tissue, skin, and joint support.*
Grass-fed, bovine-sourced hydrolyzed collagen peptides.
Electrolytes
Hydration and muscle contraction.*
Sodium, potassium, and magnesium. Individual amounts are disclosed in the Supplement Facts panel.
Vitamin C — 250 mg
Required for collagen synthesis.*
Vitamin C has an established role in the body's formation of collagen.
Glycine — 500 mg
Supports tissue recovery.*
About one in every three amino acids in collagen is glycine.
Unflavored. No sweeteners. No proprietary blends.
Built to complement the fundamentals.
Adequate protein and resistance training remain foundational to maintaining muscle during weight loss.
RETAIN is designed to complement those efforts, not replace them.
View Supplement Facts →*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 creatine, collagen peptides, electrolytes, vitamin C, and glycine separately.
RETAIN brings them together in one thoughtfully developed formula, with fully disclosed doses and independent testing.
One scoop. One simple addition to your day.
No juggling multiple supplements or 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 |
| Full dosing disclosed, no proprietary blend | ✓ | Varies by brand |
| Independent lab testing on your lot | ✓ | Varies by brand |
| Unsweetened and unflavored | ✓ | Varies by brand |
You shouldn't have to take our word for it.
Transparency should go beyond the ingredient label.
RETAIN undergoes independent testing, and we make the available results accessible so you can see what's been tested.
We believe you deserve to know what's in your supplement, how much you're getting, and the standards behind it.
No proprietary blends. No mystery doses.
Tested by Light Labs, an ISO/IEC 17025-accredited laboratory: creatine content and heavy metals, plus a microbiological panel that lab sends to an outside laboratory.
The manufacturing facility also screened this lot for gluten and soy. Neither was detected.
The formula I built for my own muscle.
I understood that weight loss wasn't always just fat loss. But when I started losing weight myself, I was more focused on the progress I could see than what I might be losing alongside it.
With a background in biology, human physiology, and clinical research, I knew muscle deserved more attention. But understanding the science and applying it to your own life are two different things.
I wanted something purposeful, transparent, and simple enough to fit into a daily routine.
That's what led me to create GLYM — and RETAIN.
Morgan Crawley
Founder, GLYM Nutrition
Read My Story
Make muscle part of the plan.
RETAIN is available at founding pricing through November 30, 2026.
- $69.99 one-time
- $62/month founding subscription
- Free shipping on founding orders.
- Every first order is backed by our 30-day money-back guarantee, even if opened.
Founding subscribers retain their $62 price while continuously subscribed. If you cancel and subscribe again later, the price in effect then applies. Cancel or change anytime before your next shipment.
Can't I just take creatine on its own?
Absolutely.
Creatine is one of the most well-researched supplements for strength and muscle support.*
RETAIN includes a full 5 g daily serving of creatine, plus collagen peptides, electrolytes, vitamin C, and glycine, each selected for a distinct role.
If creatine is all you're looking for, standalone creatine may be enough.
RETAIN is for people who want these ingredient groups combined into one thoughtfully formulated daily supplement.
Does RETAIN help me lose weight?
RETAIN is not a weight-loss medication, stimulant, or fat burner.
It was developed for a different purpose: supporting muscle during weight loss, alongside adequate protein, resistance training, and nutrition.*
Will RETAIN make me feel bloated?
It's helpful to distinguish digestive bloating from water stored in muscle.
Creatine can increase water stored within your muscles. This may cause a small change on the scale, but it's not the same as gaining body fat or experiencing stomach bloating.
Digestive bloating is different. Creatine is generally well tolerated at standard doses, although some people experience gastrointestinal discomfort.
RETAIN contains 5 g of creatine per serving. Individual tolerance varies, and the complete formula has not been clinically tested for gastrointestinal side effects.
Follow the serving directions and consider your individual sensitivities.
Will creatine make the number on the scale go up?
It can.
Creatine may increase water stored in muscle, particularly as muscle creatine stores increase.
That can mean a small increase in body weight without an increase in body fat.
The scale doesn't distinguish between those changes, which is another reason body weight alone doesn't tell the complete story.
Can I take RETAIN while using a GLP-1 medication?
RETAIN was developed with the nutritional considerations of weight loss in mind, however you're losing it.
It's a dietary supplement, not a GLP-1 medication. It contains no stimulants and isn't intended for appetite control, and it doesn't replace adequate nutrition, resistance training, or medical care.
RETAIN has not been clinically studied in combination with GLP-1 medications. If you take semaglutide, tirzepatide, or another prescription medication, review the ingredient list with your prescribing healthcare professional before starting RETAIN.
How long before I notice results?
RETAIN isn't designed around an immediate feeling or a quick change on the scale.
The purpose is to support muscle during weight loss — something you may not notice from day to day.*
Muscle preservation is better evaluated over time, through measures such as strength, performance, and body composition, rather than whether you feel a supplement working.
Consistent use matters, along with adequate protein and resistance training.
Not noticing an immediate sensation doesn't mean nothing is happening: creatine builds up in muscle with consistent daily use. But RETAIN isn't a guarantee, and individual outcomes vary.
What am I paying for?
You're paying for the complete formulation, not just creatine.
RETAIN combines five functional ingredient groups with fully disclosed doses and specific roles behind each one.
We prioritize ingredient quality, grass-fed collagen, independent testing, and transparency about what's in every serving.
Instead of sourcing and measuring several products yourself, you get one formula designed to fit into your everyday routine.
Thoughtful formulation. Transparent doses. Independent testing. No sweeteners or proprietary blends.
How do I know what's actually in RETAIN?
We disclose the ingredient amounts on the label and publish available independent laboratory results.
You can review the testing performed on the product, including the tested analytes and applicable lot information.
Do I still need protein and resistance training?
Yes.
Adequate protein and resistance training are foundational to preserving muscle during weight loss.
RETAIN is designed to complement those efforts, not replace them.
What if RETAIN isn't right for me?
Your first RETAIN order is covered by our 30-day money-back guarantee, subject to the published policy.
You can try RETAIN as part of your routine and decide whether it's right for you.
No major allergens as ingredients. Produced on shared equipment in a facility that also processes common allergens — see our FAQ for the full statement.
*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.
So excited to get my Retain package in the mail this week! I’ve been taking it every morning and i love the way I can’t taste it in my drink but i feel so much more energetic.! I am definitely going to try it for 90 days. Mix, stir, drink, repeat!
I’ve been using RETAIN by GLYM Nutrition for 3–4 weeks, and I’m really loving it! I’m focused on building muscle, staying consistent, and maintaining my progress, so I love having something that supports my routine.
It’s super easy to mix with water, and I’ve noticed better recovery, great muscle maintenance, and even a positive difference in my skin. I’m still putting in the work, but RETAIN has been such a convenient addition.
Definitely recommend!
Highly soluble in any liquid-we opt to apply to am coffee -no bitterness or aftertaste
Approximately one month of use and no negative effects noted, no abdominal discomfort or other effects
Positive effects are increased energy, cognitive function, memory retention seems to have improved, noticeable improved physical performance and physique
Very pleased with this product
I've been taking Retain for a few weeks now and have already felt major improvements in both my energy levels and sustaining my energy throughout the day. The ingredients are incredibly clean and I love the fact that it's unflavored. An absolute must in my morning routine!!!