The Importance of Collagen and Hyaluronic Acid
Collagen, the most prevalent protein in our bodies, serves many functions. Often seen as the body’s scaffolding, it contributes to the strength and elasticity of the skin, as well as supporting muscle and tendon health. However, there’s a catch: our natural production of collagen begins to decline in our mid-20s. This decline is where collagen supplements become relevant.
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The effectiveness of collagen supplements often sparks debate among experts. Recently, a comprehensive study provided some clarity. It found that “in relation to skin, musculoskeletal health, and osteoarthritis conditions, collagen supplementation was consistently associated with favorable outcomes,” according to the report titled Collagen Supplementation for Skin and Musculoskeletal Health, published in January 2026 in the Aesthetic Surgery Journal Open Forum.
Similarly, hyaluronic acid has been extensively researched as a skin-care ingredient, whether used topically, as an oral supplement, or injected. Naturally occurring in the skin, it’s a hydration marvel, acting like a sponge that attracts and retains moisture—up to 1,000 times its weight. This quality makes it famous for its ability to plump the skin, enhancing texture, tone, and reducing the appearance of wrinkles.
Both collagen and hyaluronic acid have emerged as key ingredients in beauty marketing, playing pivotal roles in skin resilience. But which one is more essential? Well, it’s not a straightforward question. Dr. Nora Jaafar, a dermatologist, notes, “They do different jobs, so it’s not really a competition. Importantly, they tackle two issues consumers quickly notice: wrinkles and dryness. While collagen loss drives the structural aspect of aging, hyaluronic acid loss contributes visually. One influences structure, the other focuses on hydration.”
Below, Dr. Jaafar and Dr. Fiona McCarthy, medical director and founder of The Bronte Clinic and a consultant medical oncologist, explain these ingredients. They detail their functions, who should consider using them, and how to effectively include them in your skin-care routine.
Collagen vs. Hyaluronic Acid: Understanding Their Functions
In straightforward terms, “Collagen is linked to firmness and youthfulness,” Dr. Jaafar explains. “It acts as the skin’s structural foundation, helping maintain firmness, elasticity, and support.” As previously mentioned, the issue is that collagen diminishes about one percent per year starting in our mid-twenties, and Dr. McCarthy notes this loss tends to accelerate during the perimenopause period, mainly due to decreased estrogen. This leads to “sagging, jowling, deepening lines and wrinkles, and a loss of facial definition.”
