Are you trying to find fish collagens among various brands on the market but aren’t sure where to begin? To assist you in finding the right one, we’ve put together a list of the 7 best to help you pick the perfect one!
We investigated and evaluated a number of the top-selling fish collagens on the market in order to create our list of the best. Making a decision among the many options available is never simple. There are an infinite number of models available, each with a distinct price. And as you’ll find out, the best options aren’t usually the ones you imagine! This comparison is rich and relevant because of the numerous factors that were employed. You will find products featured in this ranking not only based on their pricing but also on their features and other customers reviews. To write this review, we completed 20 hours of research and did 79 fish collagens tests. You won’t need to pick products at random any more. If you’re unsure of what to look for, browse our list and consult the buying guide!
An overview of our top picks
Table of contents
The best fish collagens you can buy today
- Hydrolysate - no added flavors or colors. Tasteless and high in protein content.
- Batch Tested and Verified Gluten Free
- Type I Hydrolyzed Collagen - Great for skin, nails, hair and joint flexibility
- Product of France, Packed in California
- Great for coffee, smoothies, sauces and more! Paleo and Keto friendly!
- Bioavailable Collagen Peptides Powder ---- Our Marine Collagen is made from the scales of fresh, non-GMO, wild-caught white fish off the coast of Alaska. It’s highly bioavailable, digestible and soluble in cold water.
- Health Beneficial ---- Marine collagen peptides can be digested and absorbed by the body quickly for maximum benefits. Helps improve the health of your hair, skin, nails, joints and ligaments, and tendons**.
- Easy to Use ---- Soluble in hot or cold liquids, including coffee, smoothies, and tea. 1-2 scoops a day is all you need! It can be taken in the morning, afternoon or in the evening.
- Dietary Compliant ---- Paleo Friendly & Whole30 Approved. No added sugars or sweeteners. Made without gluten / cholesterol / mercury / dairy. Flavorless.
- 12g Collagen Powder per Serving ---- We provide a scoop to measure it, which 2 scoops of powder = 12g. That's also why the container isn’t full and just has to leave room for the scoop. And our product quantity based on weight, not canister size.
- HOW ARE WE DIFFERENT? Our Marine Collagen Powder is made from fresh Alaska Pollock sourced from the clean ocean waters of Okhotsk Sea in the Western Pacific. We follow total manufacturing transparency that starts with the number & name of the vessel that caught the fish and ends with independent lab tests (Eurofins USA) which confirm the purity of our marine collagen peptides and the accuracy of our label. Our wild caught marine collagen protein powder supports your skin, nail, hair & joint.
- HIGHLY BIOAVAILABLE TO BENEFIT YOUR HEALTH—Our hydrolyzed marine collagen consists of low molecular weight (below 2kDa) fish collagen peptides. As such, they are easily digestible. In addition, they are highly soluble even in cold liquids without forming clumps. Mix it with coffee, smoothies, tea, any time of the day. It’s flavorless. Helps improve the health of your joints, ligaments, and tendons*.
- 92% PROTEIN, ZERO FAT & CARBS—High in Protein. Keto and Paleo friendly. It contains no artificial flavors, sugar, sweeteners, preservatives, fillers or dyes. Made without dairy or gluten. Free of heavy metals (including mercury) and microbial pathogens (tested twice by independent labs). Unflavored. Contains a single potent bioactive ingredient: Pure hydrolyzed marine collagen peptides (colageno marino hidrolizado). Marine collagen powder wild caught fish free of hormones and antibiotics.
- FEWER WRINKLES, FIRMER, SMOOTHER, YOUNGER SKIN—A 2018 study found that oral supplementation with fish collagen hydrolysate (like Dr. Matthew’s hydrolyzed marine collagen peptides) improved skin texture and elasticity and had a protective effect on joint health in 120 subjects who took the peptides for 90 days. A 2015 study in women 40-59 years old who took marine peptides collagen powder found increased skin hydration and collagen density in the dermis after 8 weeks of intake.
- SMOOTH CLEAR SKIN, FULL SHINY HAIR, STRONG NAILS—One scoop contains 10g of animal-free, pescatarian friendly collagen marine powder with naturally present 18 amino acids, including high amounts of proline, hydroxyproline and the highly beneficial glycine. People find our product searching for: Collagen fish, marine collegen, marine collagen powder for women and men, collagen powder fish, collagen peptides marine, fish collagen powder for women.
- High Quality & Great Price: Amandean Marine Collagen Peptides are sourced from wild-caught fish in the pristine waters of the North Atlantic. Unflavored, easy to mix, and enzymatically processed to keep the peptides intact. Single ingredient from a transparent and sustainable source. Pescatarian friendly!
- Age Gracefully: Packed with natural glycine, known as the “anti-aging amino”, supports smooth clear skin, strong nails, and full shiny hair. Help clear up skin problems with natural pescatarian nutrition. Collagen protein has similar benefits as bone broth.
- Hael Your Body From The Inside: We need a collagen supplement to replace that which is lost as we age. After 30, our collagen levels start to drop by 1.5% per year. A gut friendly protein that supports a healthy metabolism, muscles, joints, bones, ligaments, cartilage. Quicker exercise recovery for both men and women!
- Don't Settle For Less: Beware of collagen hydrolysate made from farm raised fish that are packed full of hormones and antibiotics. Our fish gelatin is hydrolyzed to a low 3000 Dalton molecular weight for maximum bioavailability. Compare our container, which is 500g = 1.1lbs = 17.6oz.
- 90 Day Satisfaction Guarantee: A trusted company that cares about customers. All batches are third-party lab tested for quality and safety. Fuel your workouts. Heal your body. Look your best. Great alternative to beef collagen or to whey protein. Now we're plastic neutral too! We remove as much plastic waste as we use.
- REJUVENATE YOUR SKIN, HAIR AND NAILS NATURALLY. Collagen production declines as we get older, resulting in wrinkles and less elastic skin. Increasing collagen levels can help your skin look firmer, smoother and more youthful. It can also help maintain sleek, shiny hair and stronger nails.
- SUPPORT HEALTHY JOINTS AND BONES. As collagen decreases in our bodies, our tendons and ligaments move less easily, causing stiffness and swollen joints. Adding marine protein peptides can help your joints move more easily and may reduce the risk of joint deterioration. It is also essential to maintaining healthy bones.
- BOOST METABOLISM AND ENERGY. Collagen protein is critical to a healthy metabolism. Amino acids such as glycine can boost metabolism and increase energy levels. It also helps in muscle development which burn more calories than fat.
- CUSTOM PREPARED FROM ONLY WILD-CAUGHT FISH. We source our Marine Collagen Peptides from sustainably sourced Non-GMO, Wild-Caught Cod, Pollock and Haddock caught in the deep, pristine waters of the North Atlantic Ocean, Arctic Ocean and surrounding seas. Wild fish have far more nutrients and are free of harmful antibiotics and GMO feed. We custom prepare the powder to ensure a neutral taste and that it easily dissolves in cold or warm liquids.
- FREE SCOOP included.
- MARINE COLLAGEN TABLETS: Collagen diminishes with age. Youtheory Marine Collagen helps replenish this vital protein to revitalize skin, hair, nails, tendons & ligaments. This fish-sourced formula is formulated to improve digestibility & absorption.
- HYDROLYZED COLLAGEN PROTEIN: Collagen is the single most abundant protein in the human body. It’s literally the ‘glue’ that binds us together. Our hydrolyzed formula is highly bioavailable which means it is easily and rapidly absorbed in the body.
- BEAUTY BEGINS WITHIN: Feel your best at every stage of life. Support your wellness journey with high-quality Youtheory supplements.
- REVITALIZE, REPLENISH AND NOURISH: We believe that health and beauty start inside with the best wellness supplements and products.
- THE RIGHT CHOICE: Dairy free, Soy free, and contains No Gluten Ingredients. This product is third-party tested and manufactured in the USA.
- LOOK RADIANT & YOUTHFUL: Type 1 & 3 Collagen peptides provide the proteins & amino acids necessary to support healthy bones, skin & nails as well as improving joint function and your body’s response to strenuous exercise. Help realize your inner beauty from within - with just one scoop per day. Looking for more hair, skin & nail support? Check out our Collagen Beauty products.
- MORE COLLAGEN PER SCOOP: Our marine collagen peptide powder contains nothing but single ingredient collagen peptides sourced from wild-caught fish. Get more collagen per scoop - each scoop of our collagen protein powder contains 10 grams of low molecular weight type 3 & 1 collagen peptides with 18 amino acids including glycine, proline, and hydroxyproline. Our powdered collagen has 9 grams of protein per serving in only 35 calories.
- EASY TO USE: Meet your new morning ritual! Dissolving conveniently and easily in hot or cold water, Sports Research Collagen Peptides tastes great and dissolves completely in coffee, tea, smoothies, soups, and more. Our hydrolyzed formula is an easy way to supplement collagen type 1 and collagen type 3 into your daily ritual. Collagen peptides powder for women and men provides support for healthy joints, bones, skin & nails.
- PACKAGED IN THE USA: Our Marine Collagen Peptides Powder is 3rd party quality tested Non-GMO, Paleo friendly, and Keto certified right here in the USA. Our powder collagen supplies you with thirty four (34) servings per container and is packaged with our premium, vented safety seal to keep your product safe during shipping.
- THE SPORTS RESEARCH DIFFERENCE: Created in 1980, Sports Research is a privately-owned business born from a passion for fitness, wellness, and healing. Our goal is to help people live their best lives through real, research-backed ingredients created for every body — inside and out. We're fully dedicated to sourcing the highest quality products from around the world, backed by third party testing. We all deserve the best in our quest for healthy living. Our mission is to give you just that.
- DOCTOR’S BEST FISH COLLAGEN - contains Type I collagen peptides from Naticol Fish Collagen. Naticol Collagen peptides are easily dispersible, providing efficient digestibility and absorption. Type I collagen helps form the strongest connective tissues and thus provides support for skin, joints and bone health.
- BENEFITS - Marine collagen helps boost the skin’s resilience and capacity for water absorption and retention.Collagen is the key building block for tissues of vital organs, joints, ligaments, tendons, hair, nails and the dermis layer of the skin
- REVITALIZE FROM THE INSIDE - collagen’s anti-aging benefits, help make your skin softer and firmer while reducing wrinkles. Also helps with bone strength, joints, mobility, flexibility and metabolism.
- TASTELESS & ODORLESS – since collagen is tasteless, odorless and dissolves easily, it blends easily with hot or cold beverages.
- Non-GMO, Gluten Free, Soy Free
- During the summer months products may arrive warm but Amazon stores and ships products in accordance with manufacturers' recommendations, when provided.
- ALL-IN-ONE MULTI COLLAGEN PROTEIN CAPSULES – Caribou Nutrition provides proprietary collagen peptide pills that are formulated with a unique blend of 100% grass-fed beef, Chicken Bone Broth, Hydrolyzed Collagen Peptides from Wild Fish, and Eggshell, including Types I, II, III, V, & X.
- BRING YOUTHFULNESS BACK – Is mother nature and father time getting the best of you? Get the support your body needs with our Collagen Peptide Pills that helps supports tendons, joints, ligaments, and muscles and supports a healthier digestive system. Get back the feeling of youthfulness with our Multi Collagen Peptides Pills!
- FEEL THE DIFFERENCE IN QUALITY – Caribou Nutrition is hyper focused on delivering the best quality at a perfect price. Caribou multi collagen pills is a trusted product and brand because all our products are manufactured in the United States, ingredients are 3rd party tested, which is unlike other brands in the market. This allows us to provide the highest quality in each of our bottles with a full 2-month supply!
- MAKING YOU A BETTER YOU – Our multi collagen peptides capsules will revolutionize your body giving you support for an active lifestyle you desire. The Collagen Protein capsules will promote heart health. The 5 types of collagen hydrolysate in our Multi Collagen Supplement will bring you back to being the best you!
- BE CONFIDENT IN YOUR PURCHASE: At Caribou Nutrition, we strive daily for excellence in all our products and know that all customers will be satisfied with their results. If any customer is not satisfied with the results of their collagen, then we stand behind our product to either refund of replace the product with a 100% guarantee.
- Heaven, Collage (Author)
- English (Publication Language)
- 82 Pages - 05/21/2021 (Publication Date) - Independently published (Publisher)
Helps nourish joints and bones
High-purity collagen formulated for fast absorption
- Per GMP guidelines set forth by the FDA, most products are formulated for 24 months from the date of manufacture. Liquids and probiotics are formulated for 12 months.
- Marine collagen + biotin + vitamin c + hyaluronic acid: Codeage Biotin Marine Collagen protein is a wonderful formula packed with ingredients all-in-one. This marine collagen formula offers collagen of type 1 & 3 combined with 10,000 mcg of biotin, vitamins C & E, hyaluronic acid and amino acids. This product doesn't contain shellfish.
- Pure collagen: Our marine collagen peptides powder comes from pure marine sources. Marine collagen is a superior solution for non-meat eaters. The formula features wild-caught and deep-water ocean white fish and is hormone free. The collagen hydrolysate goes through an hydrolization process to help provide a high-quality fish collagen supplement.*
- Multivitamins: This unique formula also offers vitamin C, Vitamin E and hyaluronic complex. Codeage marine based collagen supplement is also hypo-allergenic. Our bio active marine collagen is sourced from fish, but during our extraction process, almost all allergens are removed from the collagen.
- 10,000 mcg biotin & organic blend: This solution features 10,000 mcg of biotin per serving and offers amino acids. The formula also includes an organic blend of fruits, herbs and mushroom including amla berry, rose hips extracts and lemon powder. Codeage marine collagen capsules are designed for both men and women.
- Non-GMO: Codeage hydrolyzed marine collagen peptides is non-GMO, and keto-friendly. This dietary supplement is made in the USA in a cGMP certified facility and Third Party tested. It comes with a combination of ingredients in a convenient and easy-to-use capsules format.
- ✔️ Benefits Hair, Skin & Nails: Discover the benefits of our Marine Collagen powder, in hydrolyzed collagen powder form, as it supports the health and vitality of your hair, skin, and nails.* This Marine Collagen Peptides powder, one of collagen supplement, is perfect for active enthusiasts whose always on the go daily!
- ✔️ Essential for Joints: Never skip another activity again with our Marine Collagen Powder! Support your joints and bones so you can stay active throughout the day.* Keeping active no matter how fast life moves has never been easier, add our Hydrolyzed Collagen powder, a collagen peptides powder, with every serving!
- ✔️ Perfect for Restricted Diets: Experience the pure & clean quality of our Marine Collagen powder, a hydrolyzed collagen powder, free from gluten, dairy, soy, and sugar - perfect for dietary restrictions. Feel safe knowing that this collagen supplement, a collagen protein powder, won't disrupt your diet or everyday habits.
- ✔️ Optimal Absorption & Convenient: A high-quality protein source for your body! It's in hydrolyzed form which offers optimal absorption and digestibility. Simply mix 1 tsp (2500mg) of our Marine Collagen powder into your favorite beverage or recipe daily for best results. Our Hydrolyzed Marine Collagen powder allows for versatile use in a variety of dishes without altering the taste.
- ⭐ High Quality Brand: BulkSupplements.com is committed to providing high-quality supplements manufactured at cGMP standards and third-party tested. We prioritize customer satisfaction and ensure that our Marine Collagen powder, a hydrolyzed collagen powder, meet strict standards of purity and potency.
- WILD CAUGHT, BODY OPTIMIZED - Discover the secret to beauty that glows from the inside out... our protein powder collagen is for joints, hair, skin, nails to improve overall health and vitality. Sustainably sourced from fresh, wild-caught ocean whitefish.
- TASTES LIKE NOTHING - Flavorless yet potent, our unflavored collagen powder can be invisibly mixed into whatever you normally eat and drink. Type I fish based collagen can be absorbed 1.5x more efficiently by the body to repair bones, joints, and tissues even faster.
- EASY TO MIX & DISSOLVE - Perfect for pre and post workout smoothies, this hydrolyzed collagen is for men and women in the morning, afternoon, and evening. Sea collagen powder dissolves just as easily in ice cold drinks as it does in hot food and beverages.
- KOSHER CERTIFIED INGREDIENTS - Maxi is dedicated to formulating the best marine collagen powder from pure and natural ingredient sources. Does not contain parabens, soy, wheat, salt, gluten, milk, artificial flavors, colorings, or preservatives. Certified Kosher by the OU/UK.
- MAXI HEALTH: TRUE TO TOTAL WELLNESS - Our products are the result of years of research and development to ensure quality, purity and efficacy. That’s how Maxi helps you live life to the maximum. We are committed to ensuring your lifelong satisfaction.
- The highest potency available of the best type of nano-sized collagen (90% Type I & 10% Type III) produces the best results. Marine Collagen are highly bio-available, digestible and soluble in cold water. Sourced from Cod fish skin, wild caught in the Pacific Ocean.
- COLLAGEN ON THE GO; Wild Alaskan Marine Collagen powder comes in stick sachets for your convenience to provide collagen you need on the go. It can be easily added and dissolved in any beverages or food.
- QUALITY; The product is manufactured in an FDA facility registered, GMP registered, 3rd Party tested. DOES NOT CONTAIN: Fat, Sugar, Preservatives, Artificial Ingredients, Pesticides, Cholesterol, lactose, GMO ingredients, and Gluten.
- PURE & NATURAL; Contains highest grade Marine Collagen Peptides manufactured exclusively from wild-caught, deep-sea Pollock Fish Skin, sustainably harvested from Alaska, North Pacific Ocean.
- Categories:
- ✓ Magnificent grid layouts that will enchant you completely
- ✓ Wonderful backgrounds which will emphasize the look of your photos
- ✓ Terrific frames for making your collage art cool
- ✓ Astounding stickers that are going to surprise you
- ✓ Opportunity to use the latest design of yours as wallpaper on the phone
- English (Publication Language)
- HIGH BIOAVAILABILITY: Achieved from the Patent Oral Dissolving Film (ODF) Technology, allowing fast absorption of Low Molecular Weight Fish Collagen
- DIFFERENTIATED PACKAGING: Individually packaged Oral Dissolving Film in a sealed pouch guarantees safe intake.
- ADVANTAGE OF ORAL DISSOLVING FILM: Countless thesis papers published show how efficient and fast the absorption is through oral mucosa when taken as an edible film formulation.
- Immediate absorption through oral mucosa most close to skin
- Depth of Eye wrinkles decrease
- PREMIUM SOURCE: Zammex Marine Collagen Peptides is delivering high-quality Type I & III collagen without additives. It contains 18 essential amino acids, excluding gluten, cholesterol, mercury, and dairy.
- ENHANCED SKIN HEALTH: Zammex Marine Collagen Peptides powder is a scientifically proven solution for improving skin health. It promotes increased skin elasticity, reducing the appearance of wrinkles and giving your skin a youthful and radiant glow.
- NOURISHIED HAIR AND NAILS: Experience thicker, more beautiful hair and stronger nails with Zammex Marine Beauty Collagen Peptides. It nourishes hair follicles, promoting hair growth and increasing hair volume. Additionally, it enhances the health and resilience of your nails.
- WILD-CAUGHT COD FISH: We prioritize quality by sourcing our marine collagen peptides from 100% Deep-Sea Cod Fish. Unlike inferior alternatives that use fish scales, we select only the collagen-rich fish skin for superior efficacy and results.
- QUALITY TESTED & SAFETY ASSURED： ZAMMEX Marine Collagen Peptides is 3rd-party tested for purity and manufactured in the USA in a cGMP-certified registered facility, and our powder collagen packaged with our premium, vented safety seal to keep your product safe during shipping. Also, we provide 90-DAY AFTER-SALE SATISFATION GUARANTEE!
- Premium quality: 100% Wild Caught in the pristine North Atlantic waters, Codeage Wild Caught Marine Collagen powder is a source of sustainable collagen of type 1 and 3. The formula also offers 18 different amino acids. This formula is Non-GMO, Gluten Free, and Paleo Friendly. It’s a pure collagen solution: no additives, preservatives or sulfites are used. Ever.
- Marine collagen: Marine collagen is a superior solution for non-meat eaters. The formula features pure wild-caught and deep-water ocean white fish and is hormone free. Collagen makes up to 30 percent of all proteins in the body and can function to help hold the body together. Collagen can play an essential role for your hair, skin, nails, joints, gut, and mobility!*
- Absorption and bioavailability: The bioactive marine collagen in this product is hydrolyzed to help making it easier to digest and is hypo-allergenic. Our marine collagen is sourced from fish, but during our extraction process, almost all allergens are removed from the collagen.
- High in collagen, low calorie: One serving of Codeage marine collagen protein powder mix provides 9g of collagen and only 33 calories! Add a heaping spoonful to any smoothie, shake, cold drink or hot drink for a daily boost of collagen protein. Excellent for cooking, our formula mixes into liquids cold or hot.
- Manufactured in the USA: Codeage hydrolyzed fish collagen is made in a cGMP certified facility in the USA and third party tested.
How to choose a good fish collagens
Does the idea of finding a fantastic fish collagens make you anxious? When it comes to purchasing this product, specifically when deciding which model to select, has your head been spinning between options? You are not alone if that is the case. We are aware of the pressure involved in the purchasing process!
Your presence here indicates that you are interested in fish collagens. Before choosing which product would be the best for your needs after being inundated with information, locate a reliable source with genuine selections. You can get that information from a variety of sources, including buying guides and rating websites, word-of-mouth recommendations from friends and family, online discussion forums where users can share their own experiences, product reviews that can be found all over the internet, and YouTube channels. You can only get the right product through exhaustive analysis. But you realize that’s not always simple. In order to ease your concerns, we have taken the time to develop a list of the top fish collagens products available right now. You might be wondering how we came up with the list. How was this buying guide developed?
First, we used our algorithms to gather as much reliable data as we could about these products. To verify all the data gathered, we used both artificial intelligence and a lot of algorithms.
Then, our experts used criteria that are recognized in the business to evaluate them according to their quality to price ratio, allowing us to choose the top fish collagens on the market right now!
The selection of the goods is not arbitrary. Before creating a list, we take into account a number of factors. Below are some of the criteria discussed:
Brand Value: What happens if you choose a dubious brand just because it appears to be a good deal? So the likelihood of receiving a product with a short shelf life increases. That is due to the fact that well-known brands have a reputation to uphold, while others do not. Top fish collagens brands strive to provide some distinctive traits that set them apart from the competition. So, hopefully one or more of the items on our list will be perfect for you.
Features: Useful features are all you need, not tons of them. We consider the important aspects and select the top fish collagens based on those.
Specifications: Numbers always help you measure the quality of a product in a quantitative way. We try to find products with higher specifications, but with the right balance.
Quality: A product’s quality may always be quantified with the aid of numbers. We look for goods with better standards that strike the proper balance. The best quality product that gets highly appreciated and recommended by experienced users.
Customer ratings: Would it be accurate to suggest that the fish collagens were used by hundreds of customers before you? Superior ratings indicate that many customers had better service.
Customer Reviews: Like ratings, provide you with accurate and reliable information about the product from genuine customers. Customer ratings are very important to all of us because they contain accurate and reliable information about the customer service we received from several hundred customers.
Seller Rank: This is very intriguing! Not only do you need a good fish collagens, you also need a product with rising sales that is trendy. It accomplishes two goals. First, the expanding user base proves the quality of the product. Second, given that number, producers must be able to offer greater quality and after-sales support.
Value: You get what you pay for, they say, so consider the value. Cheap isn’t always good and expensive isn’t always bad. However, that does not imply that spending a lot of money on a product that is flashy but underwhelming is a good idea. Before adding them to the list, we make an effort to evaluate how much value you can get for your money from your fish collagens.
Durability: Durability and reliability are closely related concepts. You will benefit from a strong and long-lasting fish collagens for months and years to come.
Product availability: Products come and go, and new ones replace the old ones. Most likely, a few new features and required changes were made. What use is it to use a supposedly good product if the maker no longer supports it? We make an effort to highlight products that are current and offered by one or more trustworthy sellers, if not more.
Negative Reviews: Yes, we do take that into account as well! The goods with the majority of bad reviews are filtered out and disregarded when we choose the best-rated one on the market.
These are the standards by which we selected our fish collagens. Do we end our process there? Hell no. The most crucial fact about us that you should be aware of is that we regularly update our website with current and pertinent information. We have one more layer of filtration since we place the greatest importance on reader satisfaction. Please let us know if any product included here is incorrect, irrelevant, subpar, or simply out of date. We always value your opinions, and we’ll work hard to make any necessary corrections to our list in response to them.
Why should you believe us?
There are now thousands of possibilities for these products on Amazon, but choosing the best one can be difficult and time-consuming. And what fish collagens should you purchase in 2022?
This guide is the result of more than 10 years of experience in researching, testing and writing about many topics. Each member of our team is an authority in their area. We read every article we could find online and every consumer review on every retail website for seven hours. Additionally, we discovered a ton of websites that offered helpful resources, including buying tips and thorough information on fish collagens.
