Collagen After 40: What Declines and What Can Be Rebuilt
What really changes in your skin after forty, what can be rebuilt, and how a proper assessment shapes the right plan.
Collagen is the protein that gives skin its structure, firmness and bounce. In our twenties our bodies produce it in abundance, but that production slows steadily with time. By the time many people reach their forties, the change becomes visible: skin can look less firm, fine lines settle in, and the face may start to lose some of its natural support. The reassuring news is that while we cannot stop the clock, modern medical aesthetics offers ways to support the skin’s own collagen and soften these changes. Here is what declines after 40 and what can realistically be rebuilt.
What happens to collagen as we age
From around the age of 25, collagen production begins to decline by roughly one percent each year. After 40, and especially around menopause for many women, that decline can accelerate. Estrogen plays a role in maintaining collagen, so hormonal shifts often speed up the loss. Existing collagen fibres also become weaker and less organised over time, and the skin produces less elastin and hyaluronic acid, the components that keep it plump and elastic. The result is skin that feels thinner, drier and less resilient than it once did.
Signs of collagen loss you might notice
Collagen loss rarely announces itself overnight. Instead it appears gradually. You might notice fine lines around the eyes and mouth, a softening of the jawline, cheeks that look flatter or slightly hollow, and skin that no longer bounces back the way it used to. Some people find their skincare products no longer seem to do enough, or that makeup settles into creases. These are all normal parts of ageing, not flaws, and understanding them helps you make informed choices about what, if anything, you would like to address.
What can be rebuilt, and what cannot
It helps to be honest about what is possible. No treatment can return your skin to exactly how it was at 25, and any clinic promising that is overpromising. What quality medical aesthetics can do is support your skin’s natural repair processes so that it produces fresh collagen over time. Treatments that stimulate collagen work with your own biology rather than simply adding volume. This is the heart of our approach at SKN MD, summed up in the phrase we don’t fill, we correct. The aim is a refreshed, natural version of you, not a different face.
Medically directed options that support collagen
Several treatments can encourage the skin to build new collagen, and the right combination depends on your skin, your goals and your anatomy. Biostimulators such as poly L lactic acid work gradually, prompting the skin to generate its own collagen over a series of months for a subtle, natural improvement in firmness. Skin tightening using monopolar radiofrequency heats the deeper layers to encourage tightening without surgery. Microneedling on its own supports texture and glow, while PRP and PRF use components from your own blood to support skin quality. Where lost structure needs to be addressed, carefully placed dermal fillers can restore support using the MD Codes method for balanced, natural results.
Why a proper assessment matters
Because collagen loss affects everyone differently, there is no single treatment that suits every face. A thorough consultation is the most important step. Our nurse injectors work under medical direction to assess the whole face, discuss your priorities and design a plan that may combine treatments over time rather than relying on any one quick fix. This considered, medical approach is what sets medically directed aesthetics apart. You can visit our clinics in Montréal and Ottawa to begin with a personalised assessment. Costs vary depending on the treatments chosen and the number of sessions your plan involves; for general guidance on ranges, please see our Tarifs page.
Frequently asked questions
At what age should I start thinking about collagen?
There is no single right age. Collagen begins declining in the mid twenties, so some people choose skin quality treatments earlier, while others start addressing firmness in their forties or later. A consultation can help you decide what makes sense for you.
Do these treatments really rebuild collagen, or just mask the signs?
Collagen stimulating treatments such as biostimulators and radiofrequency skin tightening are designed to prompt your skin to produce new collagen over time, so the improvement comes from your own tissue rather than a covering effect. Results build gradually.
How long before I see results?
This depends on the treatment. Some options show gradual change over several weeks to several months as new collagen forms. Your clinician will explain a realistic timeline during your consultation.
Is there any downtime?
Downtime varies by treatment and is generally mild for the options discussed here. Your clinician will review what to expect and how to care for your skin afterward.
Curious about what could work for your skin? Book a consultation at SKN MD in Montréal or Ottawa.
This article is for general information only and is not medical advice. Individual results vary and no specific outcome is guaranteed. Please consult a qualified healthcare professional to determine what is appropriate for you.
