Bio-Avail Collagen+
Certified Grass-Fed Collagen Peptides
Bio-Avail Collagen+
Certified Grass-Fed Collagen Peptides
Get the purest, highest-quality collagen peptides to support your skin, joints, and overall health!
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10 grams of certified grass-fed collagen peptides per serving
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Low molecular weight for superior absorption and effectiveness
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Support skin elasticity, joint comfort, and gut health
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Enhances muscle recovery, promotes satiety, and improves sleep quality
See What Others Are Saying
Enhance skin elasticity and hydration
Reduce fine lines and wrinkles Support a more youthful, radiant complexion
Maintain healthy cartilage and connective tissue
Reduce joint discomfort and stiffness. Support bone density and strength as you age
Speed up muscle and tissue recovery after exercise
Support tendon and ligament strength and integrity Improve body composition
Support a healthy gut lining and barrier function
Balance appetite and promote feelings of fullness Improve sleep quality through glycine content
Certified Grass-fed collagen peptides (SOLUGEL®)
Contains 10 grams of SOLUGEL® certified grass-fed collagen peptides—the only truly certified grass-fed collagen on the market. Unlike competitors who make unverified "grass-fed" claims, our collagen is certified by LIAF Control in collaboration with the American Grassfed Association. This certification guarantees that our collagen comes from cattle raised outdoors on pasture 365 days per year with free access to fresh grass, air, land, and water. It also ensures the animals are born and raised on family farms/ranches—rather than big multinational corporate operations. Never given hormones, antibiotics, or anabolic steroids, our cattle are continuously subject to veterinary supervision and raised according to the highest ethical standards.
What sets our collagen peptides apart is their optimal molecular weight (average 2 kDa). At this size, the peptides dissolve completely clear in liquids, are rapidly absorbed in the digestive tract, and are more bioavailable. This low molecular weight prevents the digestive discomfort that some people experience with other collagen supplements and ensures that the active peptides reach your tissues where they can provide maximum benefit.
Signs You Need Bio-Avail Collagen+
Fine lines, wrinkles, or dry, thin skin
Joint discomfort, stiffness, or decreased mobility
Longer recovery time after exercise or injury
Brittle nails or thinning hair
Digestive discomfort or gut sensitivity
Poor sleep quality or difficulty falling asleep
What You'll Feel Using Bio-Avail Collagen+
90-Day Money Back Guarantee
We're confident you'll love our products, but if you're not completely satisfied, we offer a 90-Day, 100% money-back guarantee on all purchases. Simply contact us for a full refund, no questions asked. Buy with confidence knowing you're covered by our guarantee.
The Adapt Naturals Standard
In our increasingly toxic world, the last thing you want to worry about is a lot of artificial junk in your supplements. Adapt Naturals supplements are made with the cleanest possible ingredients, without gluten or GMOs. Our products are manufactured in a U.S. facility that meets the NSF’s rigorous GMP regulatory standards.
Third-Party Lab-Tested with Transparent Results
We conduct third-party testing on all our products to verify their purity, potency, and safety. Most importantly, we transparently share these results with our customers by posting Certificates of Analysis (COAs) and test results directly on our website. We want you to have full confidence that you’re getting exactly what you think you are with each purchase.
See Test Results
Meet Chris Kresser, your
Trusted Health & Wellness Guide
Founder & Functional Medicine Clinician
- Globally renowned expert with over 15 years of experience
- Dedicated to helping people improve their health by addressing modern challenges and nutrient gaps
Author & Educator
- Treated thousands of patients
- Trained more than 2,000 healthcare professionals
- Gained valuable insights into functional medicine and nutrition
Unlock Your Optimal Health
Upgrade Your Wellness with Bio-Avail Collagen+—Certified Grass-Fed Collagen Peptides Optimized for Superior Absorption
Get Healthier & Happier - Try NowYour Questions Answered
Adapt Naturals Bio-Avail Grass Fed Collagen, I'll give it a five because it pleasantly dissolves in both warm and cold liquids. It has a very mild slight flavor that actually makes water taste good. i have not used it long enough to notice a difference in my skin, however, I did buy a second package because I trust Chris and his Adapt Natural products. Looking forward to the results this will have on my skin!
Hey Val,
Dissolves pleasantly in warm and cold liquids has a mild flavor that actually makes water taste better and backed by Chris and the Adapt Naturals standard of quality...that is a great start! The SOLUGEL® certified grass-fed collagen peptides at around 2 kDa molecular weight are designed to be small enough to absorb efficiently into the bloodstream rather than breaking down like ordinary protein and studies show they accumulate in skin joints and connective tissues where they signal cells to build new collagen. Give it a little more time and we think your skin is going to tell you everything you need to know. Thank you for trusting us and for sharing!
This Bio-Avail Collagen+ is very nice. I did take another organic collagen brand and it was not nearly as easy to mix and as smooth this product. I use Bio-Avail Collagen+ to give myself that small bit of easily digested protein before I go to my 5 AM CrossFit class, M-F. I take it on the weekend days as well.
Hey Ruth,
Easier to mix smoother and cleaner than your previous organic brand and a perfect pre-CrossFit protein source seven days a week at 5 AM...we love all of this! The SOLUGEL® certified grass-fed collagen peptides at around 2 kDa molecular weight are hydrolyzed down to small peptides that are highly bioavailable and easy to digest making them a wonderful choice before training. The amino acids get absorbed efficiently and delivered to the connective tissues joints skin and tendons that need them. Your commitment to showing up every single morning is impressive and we are glad Bio-Avail Collagen+ is part of that routine. Thank you for sharing!
I have fine thin hair and soft nails. I see the difference from when I take this product and when I don't. I trust the founder, a well respected person in the functional medicine world. This product dissolves easily in my coffee and also easy to incorporate in your routine.
Hey Marsha,
Thank you so much for this wonderful review! We're thrilled to hear you're seeing noticeable improvements in your hair and nails—that's exactly what we love to hear! It's also great that you've been able to compare taking it versus not taking it. That real-world experience really shows it's making a difference for you. We're so glad it dissolves easily in your coffee and fits seamlessly into your routine—that consistency is key! And thank you for the kind words about Chris. His 15 years in functional medicine really shaped how we formulate everything, and it means a lot that you trust the quality. Thank you for being part of the Adapt Naturals family and for taking the time to share your experience!
Mixes easily with frother, clean, excellent collagen source however very expensive for a 1 month supply even with the “subscription” discount. A more reasonable price would afford a 5 star rating. At 60 years old in this economy, it’s not as affordable as I wish it was, heading towards retirement & needed to save $$$. I’ll purchase when I’m able. A Senior or Veteran discount would be nice.
Hi Dorothy,
Thank you for your kind and honest review—we’re grateful you’re finding the quality and clean formulation valuable. Bio-Avail Collagen+ includes premium hydrolyzed peptides, which we source for purity and absorption. That said, we hear you on price and truly appreciate your perspective. We’ll also pass along your feedback about senior and veteran discounts to the team!
Living in a town of 1000 people in Colorado, makes it impossible to find a collagen powder. I feel fortunate to have found Adapt Naturals! Thank you for coming into my life! This collagen powder is the best ever! Debbie
Hi Debbie,
We’re so happy you found us and that Bio-Avail Collagen+ is working well for you! Our formula is made with hydrolyzed collagen peptides for maximum absorption, so it makes all the sense that it would support your back joints and furthmore alleviating the discomfort. Thank you for sharing your experience with us and for being a member of the Adapt Naturals family!
This provides a great way to add more protein to my diet. Highly recommend this to all. It is very easy to incorporate without clumps and random sifting. The measurements are easy to scoop and accurate. Has a neutral flavor and allows the combination with a wide range of recipes. Many thanks!
Hey Margaret,
We love that it fits so easily into so many recipes! The SOLUGEL® certified grass-fed collagen peptides were chosen in part because they dissolve cleanly with a neutral flavor, making it simple to add a protein boost to just about anything. Thank you so much for the recommendation and for sharing!
My husband and I both use a scoop of collagen in our coffee daily. Noticeable difference with a reduction in morning aches and stiff joints. I feel like my lines are reducing, too! No added flavor, only benefits!
Hey Angela,
Both of you noticing a reduction in morning joint stiffness and aches and visible skin line changes from one scoop in your morning coffee is such a wonderful outcome and we love that it has become such a natural part of your daily ritual! The SOLUGEL® certified grass-fed collagen peptides at around 2 kDa molecular weight are absorbed efficiently into the bloodstream and delivered directly to joints connective tissues and skin where they signal cells to build new collagen and it sounds like both of your bodies are putting them to great use. No flavor only benefits is exactly what we designed it to be. Thank you so much for sharing!
I started using Adapt Naturals collagen a month ago, and my face is aging in reverse. I have also noticed a lot less tightness in the knee's when I go into a sitting squat. I can really see a difference in my skin, and I think this means the Collagen is really helping with my damaged gut lining (Diverticula). It dissolves into liquid, even cold liquid with no problems. I use it in my smoothies and my homemade grass fed beef gelatin fruit juice gummies. I also use Inner Radiance and Vitamin E (as well as D3&K2) and I think these three together makes a very big difference in the health of your gut, skin, hair, and nails. I have used a few other Collagen brands, but never with these results. Definitely worth it. Thank you Chris for bringing Adapt Naturals into our lives.
Hey Charlene,
Aging in reverse less knee tightness visible skin changes and using it in smoothies and homemade grass-fed gelatin gummies is such a creative and enthusiastic approach to collagen and we love all of it! The SOLUGEL® certified grass-fed collagen peptides at around 2 kDa molecular weight are absorbed directly into the bloodstream and delivered to collagen-rich tissues throughout the body and it sounds like your skin joints and gut lining are all putting it to work. Stacking it with Inner Radiance and Bio-Avail E+ is such a smart combination and the results you are describing across skin hair nails and gut lining speak to just how synergistic those three can be. Thank you so much for the kind words and for sharing!
The quality and form of collagen matters, so I'm careful not to just buy any collagen!
Hey Grace,
Being discerning about collagen quality and form rather than just buying any product is exactly the right approach and we are so glad SOLUGEL® certified grass-fed collagen peptides at around 2 kDa molecular weight are meeting that standard for you. The form really does matter because small bioavailable peptides get absorbed and delivered to where the body needs them while ordinary protein just gets broken down. Thank you so much for sharing!
This collagen is superior to the others on the market.
Hey Lori,
Appreciating the CoreBiome® tributyrin for gut lining protection specifically is such an informed and thoughtful observation and we love that you recognized it! That is exactly what sets Biome Protect apart from standard pre and probiotics. The Bacillus coagulans and FortiPhage™ bacteriophage prebiotic address the microbiome from two completely different angles while the CoreBiome® tributyrin fuels and repairs the gut lining itself and the polyphenol blend from pomegranate grape cranberry and blueberry supports the whole ecosystem. Four layers working at once is what makes it so much more comprehensive and we are glad you see that. Thank you for sharing!
My knees have not been painful since I started using this collagen. I even started using it on my older GSD and see a difference in her. I trust the quality of Chris's products. I've been following him since his beginning.
Hey there,
Knee discomfort gone since starting and even your German Shepherd benefiting alongside you is honestly one of the most heartwarming things we have ever read! The SOLUGEL® certified grass-fed collagen peptides get absorbed and delivered directly to joint and connective tissues and it sounds like they are doing exactly that for both of you. Fourteen plus years of following Chris's work and still here means everything to us. Thank you so much for sharing!
I know it can take some time for the effects to show & everyone is different,so I’m patiently waiting.
Hey Geri,
Patient and trusting the process is exactly the right approach and we are rooting for you! The SOLUGEL® certified grass-fed collagen peptides work at the cellular level and the most meaningful results in skin joints hair and nails tend to show up between weeks 6 and 12 as the collagen building signals accumulate in the tissues that need them most. Keep going and we think you are going to be really glad you did. Thank you for sharing!
This collagen tastes better and has a smoother texture than any other Ove taken, and Infeel results in my skin already!
Hey Breanna,
Better taste smoother texture than anything else you have tried and already feeling it in your skin ...the SOLUGEL® certified grass-fed collagen peptides at around 2 kDa molecular weight are absorbing efficiently and getting to work in exactly the right places. We are so glad it is the easiest collagen you have taken and thank you for sharing!
Definitely seeing a difference. Hair is growing and nails are much stronger!
Hey Pam,
Hair growing and nails noticeably stronger is the SOLUGEL® certified grass-fed collagen peptides being absorbed and delivered directly to the tissues that need them and the body putting them to work in the most visible ways. Worth it is exactly right and thank you so much for sharing!
I add a scoop to my morning coffee, along with MCT oil. I look forward to it every day.
Hey Teresa,
Looking forward to your morning coffee with a scoop of collagen and MCT oil every single day is the best kind of supplement routine and we love that it has become something you genuinely enjoy. The SOLUGEL® certified grass-fed collagen peptides are being absorbed and delivered to all the right places every morning. Thank you so much for sharing!
I feel that my skin and joints really benefit from this product. I pair it with Inner Radiance. Great combo.
Hey Laurie,
A nurse preferring natural supplements and calling this one a winner after switching from another brand is genuinely one of the most meaningful endorsements we could receive. The Albion® magnesium bisglycinate chelate is one of the most bioavailable and gentle forms available and when someone with your clinical background notices the difference that really says something. Thank you so much for the recommendation and for sharing!
I definitely notice my nails have gotten stronger since starting this collagen several months ago. If they are getting stronger then I am hopeful other parts of my body are benefiting as well.
Hey Cindy,
Noticeably stronger nails after several months and trusting that the same thing is happening inside the body, that instinct is exactly right! The SOLUGEL® certified grass-fed collagen peptides get absorbed and delivered to all the collagen-rich tissues including joints tendons skin and the connective tissue matrix throughout the body and the nails are just the most visible signal of what is building everywhere else. And getting all of that at a better price point than your previous collagen is a real win. Thank you so much for sharing!
totally rely on this in morning
Hey Bill,
Totally relying on it every morning and feeling the energy difference over three months...the SOLUGEL® certified grass-fed collagen peptides providing glycine and the full amino acid profile that the body uses for so many foundational processes is exactly what creates that kind of consistent baseline support. We are so glad it has become such a non-negotiable part of your day. Thank you for sharing!
I've been taking the collagen for 4 months now and I am still hopeful it will work for my hair and nails. I've experienced better digestion after taking it and my nails have seen mild improvement. I am still waiting for it to help my hair and I know it will take some time for it to actually start working on my hair. I'm hoping by the 6 month mark I will see an improvement in my hair. I'm going to continue taking it :)
Hey Joann,
Three months in and it has become a seamless tasteless part of your morning juice routine...that consistency is exactly what the SOLUGEL® certified grass-fed collagen peptides need to do their work and you are building a really solid foundation. Hair and nail changes take longer to show up than other results because of how slowly those growth cycles move and three months is still within the window where the most meaningful shifts are still ahead. Keep going and we are genuinely rooting for your update. Thank you for sharing!
I truly love Bio Avail’s Collagen. My nails are stronger and my hair is not falling or breaking as much.
Hey Sharon,
Stronger nails and noticeably less hair breakage...the SOLUGEL® certified grass-fed collagen peptides getting absorbed and delivered directly to hair follicles and nail beds where they signal cells to build new collagen structure is doing exactly what it was designed to do. We love that you found a clean product you can trust and thank you so much for sharing!
I was on a different collagen product for many years and switched to Adapt Naturals. I haven’t been on it long enough to really sense the difference—still on my first pouch. I’d like to be able to come back and add to this review when I can really determine what the benefits are. If I can do that, I will.
Hey Susan,
Still early and already open to coming back with an update, we love that approach and we absolutely encourage it! The SOLUGEL® certified grass-fed collagen peptides are working at the cellular level building gradually in the skin joints hair and nails and the most meaningful results tend to show up between the 6 and 12 week mark. We are rooting for a great update from you and thank you for sharing!