Collagen and Creatine After 40: Benefits for Healthy Aging

Turning 40 does not suddenly flip a biological switch. But some of the changes that began quietly years earlier can become harder to ignore. Skin may not bounce back quite the way it used to. Joints can feel less forgiving after a long day. Maintaining muscle and strength may require more deliberate effort than it once did.

That has helped turn “healthy aging” into an enormous supplement category. Collagen, in particular, has become difficult to miss, appearing in powders, drinks, capsules, and even coffee creamers. Its connection to skin and connective tissue makes intuitive sense.

But another extensively studied supplement has traditionally occupied a very different corner of the wellness world: creatine.

For decades, creatine was associated primarily with athletes, bodybuilders, and people trying to improve their performance in the gym. Research now paints a broader picture, particularly when it comes to maintaining muscle and strength later in life.

Collagen and creatine aren’t interchangeable, and neither is something everyone needs simply because they celebrated their 40th birthday. But each has been studied for different aspects of healthy aging, and understanding those differences can help separate legitimate science from supplement marketing.

Why Collagen Gets So Much Attention as We Age

Collagen is the most abundant protein in the human body. It provides structure to skin, cartilage, tendons, ligaments, bone, and other connective tissues.

The body’s collagen changes as we age. Production decreases, while existing collagen becomes increasingly fragmented and disorganized. In the skin, these changes contribute to some of the familiar signs of aging, including reduced elasticity and changes in texture.

That’s where collagen supplements enter the picture.

Most research has focused on hydrolyzed collagen or collagen peptides, which have been broken into smaller components that can be digested and absorbed. Numerous randomized trials have investigated whether taking them produces measurable changes in the skin.

The results are promising, but not quite as straightforward as supplement advertisements sometimes suggest.

A 2025 systematic review and meta-analysis of 10 randomized controlled trials found that collagen supplementation improved measures of skin hydration and elasticity. However, the authors also noted limitations, including differences between studies and uncertainty around risk of bias.

More recent research has reinforced the need for some caution. A 2026 systematic review and meta-analysis found improvements in hydration and elasticity overall, but the studies varied considerably, and the elasticity result became less convincing when one influential multi-ingredient trial was removed. Many of the studies also had methodological concerns or industry involvement.

Another 2025 meta-analysis reached an even more skeptical conclusion: while pooling all 23 trials produced apparent improvements in hydration, elasticity, and wrinkles, those benefits disappeared when researchers looked only at higher-quality studies or studies without pharmaceutical-industry funding.

So collagen isn’t necessarily hype, but neither is the science completely settled.

For those interested in trying collagen, hydrolyzed collagen is the form commonly used in supplementation research. One available option is Progressive Complete Collagen, which provides 10 grams of hydrolyzed bovine collagen per scoop, along with vitamin C and other ingredients. The research discussed above applies to collagen supplementation generally and should not be interpreted as evidence for this specific product.

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Creatine Isn’t Just for Bodybuilders

Creatine has a completely different job.

Your body naturally produces creatine from amino acids, and you also obtain some through foods, particularly meat and fish. Most of the body’s creatine is stored in skeletal muscle, where it plays an important role in rapidly regenerating adenosine triphosphate, better known as ATP.

ATP is essentially usable cellular energy. During short bursts of demanding activity, stored ATP is depleted quickly. The phosphocreatine system helps replenish it, allowing muscles to continue producing energy.

That explains creatine’s long-standing popularity in sports. But it also explains why scientists interested in healthy aging have been paying attention.

Muscle mass and strength tend to decline as we get older. Resistance training is one of the most important tools available for fighting that decline, and researchers have been investigating whether creatine can enhance some of the adaptations produced by training.

Where Creatine Gets Interesting for Healthy Aging

A newly published 2026 systematic review and meta-analysis examined randomized controlled trials involving adults aged 60 and older. Researchers compared resistance training combined with creatine against resistance training alone or resistance training with a placebo.

The results were encouraging, but also a useful example of why supplement claims need context.

Adding creatine produced a modest additional improvement in muscle strength. However, the researchers did not find clear additional benefits for muscle mass or physical function, and they cautioned that the evidence for some outcomes remains uncertain.

Earlier research has generally pointed in a similar direction. A meta-analysis of randomized trials involving older adults found greater improvements in lean tissue mass and strength when creatine was added to resistance training than with resistance training alone.

The important words here are resistance training.

Creatine should not be thought of as a powder that independently prevents age-related muscle loss. Much of the healthy-aging evidence examines whether it can complement an intervention we already know is valuable: challenging the muscles through regular resistance exercise.

For those considering supplementation, creatine monohydrate is the form with the deepest body of research behind it. One available option is Naka Platinum Pro Creatine 400g, an unflavoured micronized creatine powder. As with collagen, research on creatine generally should not be interpreted as clinical evidence for any particular commercial product.

Again, the studies discussed here investigated creatine supplementation generally. They should not be interpreted as clinical evidence for this particular commercial product.

What About Creatine for the Brain?

This is where creatine research gets particularly interesting, although the evidence is less established than its role in exercise.

Muscle isn’t the only tissue with substantial energy demands. The brain uses considerable amounts of energy, and creatine and phosphocreatine are involved in maintaining its energy supply.

That has prompted researchers to investigate whether increasing creatine availability could influence memory and other aspects of cognition.

Some trials and systematic reviews have reported improvements in certain cognitive outcomes, with potentially greater effects under circumstances where creatine availability or energy demands differ. But this is still an evolving field.

In other words, there is enough evidence to make creatine and brain health worth studying, but not enough to turn creatine into a dementia-prevention supplement or claim that taking it will prevent normal age-related cognitive changes.

Collagen and Creatine Do Very Different Things

Putting these supplements together can make it sound as though they’re two halves of the same anti-aging formula. They aren’t.

That’s also why it can be misleading to say your body simply “needs more” of both after 40.

Aging does bring changes to collagen-rich tissues, muscle mass, strength, and how our bodies respond to exercise. But turning 40 isn’t a biological cutoff where everyone suddenly becomes deficient in collagen or creatine. Nor does taking either supplement automatically counteract the effects of aging.

A more useful question is what you’re actually hoping to support.

Someone primarily interested in skin aging is looking at a very different body of evidence from someone trying to maintain muscle and strength as they enter their 50s, 60s, and beyond. Collagen and creatine may both have a place in the healthy-aging conversation, but for different reasons and with different levels of evidence behind specific benefits.

Read More: Do Protein Powders Spike Insulin? What Every Woman With PCOS Needs to Know

Don’t Let the Supplements Overshadow What Matters Most

There is something appealing about reducing healthy aging to a scoop of one powder in the morning and another after a workout.

Unfortunately, biology isn’t that convenient.

Maintaining muscle requires actually using it. Resistance exercise becomes particularly valuable with age, alongside adequate protein and overall nutrition. Regular physical activity, sufficient sleep, avoiding smoking, and managing cardiovascular and metabolic risk factors have implications that extend far beyond anything collagen or creatine can accomplish.

Supplements can potentially sit on top of that foundation. They shouldn’t become the foundation.

And anyone with kidney disease or another medical condition, people who are pregnant or breastfeeding, or those taking medications should discuss supplementation with an appropriate healthcare professional before adding something new.

The Bottom Line

Collagen and creatine have ended up with very different reputations. Collagen has become a familiar part of the healthy-aging and beauty conversation, while creatine is still shaking off its image as something reserved for bodybuilders.

The research is more nuanced.

Collagen supplementation may support certain skin outcomes, although recent reviews raise legitimate questions about study quality, industry funding, and how large those benefits really are. Creatine has a much stronger history in exercise science, with evidence suggesting that it can provide additional strength benefits when paired with resistance training in older adults.

Neither supplement stops aging, and turning 40 doesn’t automatically mean you need either one.

But both illustrate something useful about healthy aging: different parts of the body change for different reasons, and the interventions that may help them don’t necessarily come from the same scoop.

Read More: 12 Best Foods To Help Boost Collagen

Medical Disclaimer: The author is not a licensed medical professional. The information provided is for general informational and educational purposes only and is based on research from publicly available, reputable sources. It is not intended to constitute, and should not be relied upon as, medical advice, diagnosis, or treatment. Always consult a licensed physician or other qualified healthcare provider regarding any medical condition, symptoms, or medications. Do not disregard, avoid, or delay seeking professional medical advice or treatment because of information contained herein.

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A.I. Disclaimer: This article was created with AI assistance and edited by a human for accuracy and clarity.