What is hyaluronic acid?
Hyaluronic acid is a molecule naturally produced by the body. Its essential property is its exceptional ability to retain water.
In the skin, this function is essential to maintain deep hydration, tissue suppleness, dermal density and overall skin quality.
With age, natural hyaluronic acid synthesis gradually slows. This decline begins in the thirties and increases over time through the combined effects of biological ageing, sun exposure, oxidative stress, smoking, hormonal changes and certain environmental factors.
The skin then becomes thinner, drier and less resilient. The first signs of tiredness and ageing gradually appear.
The value of injected hyaluronic acid is precisely to compensate for this natural loss and restore certain essential properties of skin tissues.
Hyaluronic acid provides lasting improvement in skin hydration
One of the main benefits of hyaluronic acid is its hydrating capacity.
Unlike conventional moisturising creams, which act mainly on the surface, injected hyaluronic acid provides deep dermal hydration. This significantly improves skin quality and gives it a more supple, radiant and even appearance.
When the skin is properly hydrated, the complexion looks fresher, fine lines are less visible, the surface becomes smoother and the skin regains elasticity.
This effect is particularly valuable for patients with dehydrated skin, a dull complexion, loss of radiance or early signs of ageing.
Lightly cross-linked hyaluronic acid injections, Skinboosters, are specifically designed to improve deep hydration without changing facial volume.
Hyaluronic acid helps prevent skin ageing
Hyaluronic acid also plays a major preventive role in aesthetic medicine.
By maintaining good hydration and better tissue quality, it helps slow certain visible manifestations of skin ageing.
Over time, the skin produces less collagen and elastin, gradually contributing to laxity and loss of density.
This encourages fine lines, skin laxity, deeper folds and loss of firmness.
Hyaluronic acid indirectly helps preserve the dermal environment by improving tissue quality and stimulating certain cellular functions. Well-hydrated skin withstands external stressors better and retains elasticity longer.
Hyaluronic acid restores facial volume
With age, the face undergoes gradual loss of deep fat volume and subtle but continuous bone resorption. These structural changes contribute to a tired or sagging appearance.
Hyaluronic acid restores certain volumes precisely and gradually and allows non-surgical facelift techniques to be performed.
The most frequently treated areas are the cheekbones, temples, nasolabial folds, tear troughs, facial oval and lips.
This volume restoration has several effects:
• Restoring freshness to the face.
• Reducing a tired appearance.
• Improving proportions.
• Restoring certain areas hollowed by ageing.
Hyaluronic acid improves skin texture and quality
Hyaluronic acid also improves overall skin quality.
Many patients now seek a consultation not to change their face, but for more radiant skin, more even texture, refined skin grain and a more rested appearance.
Appropriate injections gradually improve skin tone, suppleness, radiance and density.
This approach is particularly valuable for the face, neck, décolletage and hands.
These areas are often highly exposed to the sun and quickly show signs of skin ageing.
Hyaluronic acid to reduce certain wrinkles
Hyaluronic acid corrects certain established wrinkles visible even when the face is at rest. It is frequently used to reduce nasolabial folds, marionette lines, wrinkles around the mouth, some cheek wrinkles and various hollows related to facial volume loss.It works by restoring volume and tissue support. By providing a targeted filling effect, it also helps improve hydration and skin quality in treated areas. Its mechanism therefore differs from botulinum toxin, which reduces the activity of certain muscles responsible for expression lines.
These two approaches are often combined to treat the different components of facial ageing.
What are the benefits of hyaluronic acid for the lips?
Hyaluronic acid is also used to improve the lips.
There are multiple indications:
• Rehydrating dry lips.
• Redefining the contour.
• Correcting asymmetry.
• Restoring volume lost with age.
• Subtly enhancing the lips.
• Treating perioral fine lines.
What are the benefits of hyaluronic acid for dark circles?
Hyaluronic acid corrects under-eye hollows very naturally and precisely.
Performed precisely, this treatment helps reduce a tired-looking eye area and restore freshness to the whole face.
This area requires particular expertise because of the thin skin, rich blood supply and risk of swelling.
Not all patients are good candidates. A rigorous anatomical assessment is essential before any injection.
Is hyaluronic acid safe for the skin?
Hyaluronic acid used in aesthetic medicine is very well tolerated when injected by an experienced doctor.
As it is a molecule naturally present in the body, the risk of allergy is extremely low.
Nevertheless, an injection remains a medical procedure requiring thorough anatomical knowledge, a personalised assessment and a rigorous technique.
The main side effects are temporary:
• Redness.
• Bruising.
• Slight tenderness
• Temporary swelling.
Rarer complications exist and warrant medical care.
The quality of diagnosis, choice of indications and technical mastery are essential to ensure safety and a natural result while preserving facial harmony.
Scientific studies on the benefits of hyaluronic acid for the skin
Several clinical studies and scientific reviews have confirmed the benefits of hyaluronic acid for skin quality, particularly hydration, elasticity and reduction of visible signs of ageing.
• The randomised study published in Skin Research and Technology showed significant improvement in skin hydration, elasticity and texture after hyaluronic acid supplementation, with particularly marked results in patients with mature or dehydrated skin.
• A placebo-controlled study published in Cosmetics (MDPI, 2025) demonstrated that combining oral and topical hyaluronic acid measurably reduced wrinkle depth and improved skin elasticity after eight weeks of treatment.
• Research summarised in the academic review “Les différentes applications de l’acide hyaluronique” (DUMAS, 2024) reports several systematic reviews and meta-analyses confirming the value of hyaluronic acid in improving skin quality and managing skin ageing.
• Data cited in several dermatological publications show that even a low concentration of hyaluronic acid can significantly improve skin hydration, suppleness and fine lines thanks to its exceptional water-retaining capacity.
• Research on Skinboosters and hyaluronic acid injections also highlights their ability to provide lasting improvements in dermal density, complexion radiance and overall skin quality, particularly on the face, neck and décolletage
