Does Collagen Lead to Weight Gain? Separating Fact from Fiction
Collagen is an essential component for healthy skin, bones, and joints. It makes up about thirty percent of the protein in our bodies, functioning as a kind of "glue" to hold it all together. Over time, collagen production slows, leading to sagging or wrinkled skin and uncomfortable joints.
Certain foods can help support collagen production; these include eggs, chicken, fish, bone broth, and leafy greens. None of these are particularly high in calories. Adding something like hydrolysed liquid collagen to your diet is an effective way to supplement this vital protein. Kollo Premium Liquid Marine Collagen contains only 18 calories per serving. In short, collagen doesn't cause weight gain.
Understanding Collagen: What Is It and Why Do We Use It?
Collagen is a form of protein that helps provide structure to our body. It helps form the connective tissue that keeps skin and muscles firm, and our joints more comfortable and mobile. As we get older, our bodies don't make as much collagen naturally, so we may want to supplement that decreased level to maintain skin, joint, and bone health. A collagen supplement can also support hair and nail strength.
Collagen supplements are derived from the connective tissue in animals like cows, pigs, and chickens, or they can come from fish (such as Kollo Health's premium liquid marine collagen). The body breaks the supplement down to amino acids that then support protein synthesis throughout the body.
They come in three forms: liquid, powder, and capsules.
Types of Collagen: Liquid, Powder, and Capsules

Collagen supplements come in liquid, powder, and capsule form. Each form of collagen is typically hydrolysed, which means the collagen protein has already been broken down into smaller peptides that are easier for the body to absorb and utilise.
Can Collagen Cause Weight Gain? The Science Explained
Collagen is a form of protein. In fact, natural collagen makes up about 30 percent of the protein in our body. Collagen supplements are meant to help the body better utilise collagen peptides since natural production slows as we age. Collagen supplements are also low-calorie.
Kollo Premium Liquid Marine Collagen contains only 18 calories per sachet. Weight gain occurs when you consistently consume more calories than your body burns - not from any single food or supplement. Some packaged foods and drinks are calorie-dense, but collagen supplements are not among them.
Collagen supplements may support joint comfort and mobility, which in turn may help you engage in physical activity more comfortably.
What Happens to Collagen in Your Body? A Quick Breakdown
Collagen supplements are "hydrolysed," meaning that their protein has been broken down into smaller peptides. These peptides are amino acids that are absorbed in the digestive system and can be utilised by the body to support tissue health and maintenance.
Collagen and Calories: Should You Be Concerned?
No. Collagen supplements are low-calorie. Kollo Premium Liquid Marine Collagen contains only 18 calories per serving - far less than a handful of nuts, a piece of fruit, or a splash of milk in your coffee.
Common Myths About Collagen and Weight Gain
The science shows that collagen supplements don't lead to weight gain. The myths around them may stem from two things. First, because collagen can improve skin hydration and texture, your skin may appear plumper and more youthful. That's healthier hydration - not weight gain.
Research shows that collagen supplementation, when combined with resistance training and adequate protein intake, may help support muscle maintenance. Because muscle is denser than fat, your body composition may improve even if the number on the scale stays the same or increases slightly. This improved muscle-to-fat ratio is beneficial for overall health and metabolic function.
Does Collagen Impact Metabolism or Fat Storage?
Collagen is a protein source, and adequate protein intake supports healthy metabolic function. A 2023 study found that collagen peptide supplementation (15g daily) combined with resistance training and regular physical activity had a beneficial effect on body fat reduction in adults aged 50 and over. However, the study emphasises that collagen supplementation enhances the positive effects of exercise and a protein-rich diet - it is not effective for fat loss on its own.
Benefits of Collagen for Overall Health and Wellness
Collagen impacts your body in many helpful ways. It provides structural support to skin, joints, bones, and muscles. It may also support gut lining integrity and overall wellness.
Because natural collagen production slows down as we get older, collagen supplements can help support skin health and elasticity. It also supports hair and nail health, and joint comfort and mobility. As a protein, it contributes to overall protein intake and may support muscle maintenance when combined with resistance training.
The Role of Protein in Collagen Supplements
Collagen supplements are derived from various protein sources such as animals or fish. These are broken down into amino acids that can be absorbed by the body. The body then uses those amino acids to support various functions including tissue maintenance and protein synthesis.
How to Choose the Right Collagen Supplement for Your Goals
Choosing the right collagen supplement starts by knowing what you most want or need it for. Most people choose a supplement to support skin, hair, and nail health; studies show improvements in these areas typically become noticeable within six to twelve weeks of consistent supplementation.
Collagen supplements are also commonly used to support joint comfort and mobility. The key to results is consistency - taking the supplement daily over an extended period.
In every case, it's important to know that the supplement has been tested and certified by a third party to ensure purity and safety. Kollo Health's premium liquid marine collagen is Informed Choice certified and is the market leader in the UK, with over 40 industry awards.
Separating Fact from Fiction: Real Causes of Weight Gain
The primary cause of weight gain is consistently consuming more calories than you burn each day. Your metabolism can be affected by certain medications, age, activity level, muscle mass, and other factors.
A collagen supplement like Kollo is very low in calories (18 calories per sachet) and provides protein, which can contribute to your daily protein intake. Adequate protein intake supports satiety and metabolic function.
Because collagen supplements may support joint comfort, this could potentially make it easier to engage in physical activity more comfortably.
Tips for Incorporating Collagen Without Weight Concerns
Collagen supplements like Kollo Health premium liquid marine collagen are low-calorie (only 18 calories per sachet). In liquid form, supplements can be easily mixed into water, juice, smoothies, soups, sauces, or hot drinks. Kollo is formulated to mix easily without clumping and has a pleasant tropical flavour.
At just 18 calories per serving, it adds negligible calories to your daily intake.
Conclusion
For a healthy body, collagen plays important structural roles in skin, joints, bones, and connective tissues. Because natural collagen production slows as we age, adding a collagen supplement can support these areas of health.
All of the research around collagen supplements shows that they do not cause weight gain. In fact, recent evidence suggests that collagen supplementation, when combined with resistance training and a protein-rich diet, may support muscle maintenance and could contribute to modest improvements in body composition in active adults over 50. However, collagen supplementation enhances the effects of exercise and proper nutrition - it is not a standalone solution for weight management.
Kollo Premium Liquid Marine Collagen provides 10,000mg of hydrolysed marine collagen peptides with only 18 calories per serving - making it an easy, low-calorie addition to your daily wellness routine.
Kollo Health was co-founded by Jenni Falconer - TV presenter, Smooth Radio breakfast host, ten-time London Marathon runner and host of the RunPod podcast. Read her story and why she created Kollo.
