Why does the skin lose hyaluronic acid with age?
With age, the amount of hyaluronic acid naturally present in the skin decreases and its distribution changes. The skin then retains water less effectively and gradually becomes less hydrated and less supple.
Hyaluronic acid is a natural component of the extracellular matrix. Its ability to retain water contributes to skin hydration and helps maintain the properties of the dermis.
However, skin ageing is not simply a reduction in hyaluronic acid. Collagen decreases and becomes disorganised, elastic fibres deteriorate and cell renewal slows. Repeated ultraviolet exposure also accelerates some of these changes.
Hyaluronic acid injections therefore do not replace all the components that change with age. Their value depends on the problem being treated: dehydration, changes in skin quality or volume loss.
Can hyaluronic acid injections slow facial ageing?
Hyaluronic acid can be used early to maintain skin hydration or correct an initial change in volume, but it does not prevent every ageing mechanism.
Two uses need to be distinguished.
Skinboosters, composed of lightly cross-linked hyaluronic acid, are injected into the skin to improve hydration, suppleness and quality. They are not intended to alter facial volume.
More structural hyaluronic acids are injected deeper when an anatomical change starts to appear: weakening of facial support structures, loss of physiological volume and changes in facial curves.
The aim is then to perform non-surgical lifting techniques and restore volume that has actually decreased, rather than routinely adding volume.
Preventing ageing through hyaluronic acid injections may therefore address either skin quality or the first structural changes in the face.
Can Skinboosters prevent the first fine lines?
Skinboosters can reduce certain superficial fine lines when they are associated with reduced skin hydration and density.
Less hydrated skin is less supple and superficial fine lines become more visible. Hyaluronic acid injected into the dermis increases its ability to retain water and gradually improves its thickness.
However, a Skinbooster does not treat every wrinkle. A wrinkle caused mainly by repeated muscle contraction calls for botulinum toxin. A deep wrinkle associated with loss of support or volume requires a different approach.
Identifying the cause of a wrinkle is therefore essential before preventing or treating it.
Should you have hyaluronic acid injections before wrinkles appear?
No. Adding volume to a young face is not useful when there is no volume loss.
With age, the face changes at several levels. Deep and superficial fat changes, diminishes and descends; bone structures change and tissues become less firm.
When these changes start to become visible, a small amount of hyaluronic acid can restore support or a contour that has changed.
However, routine injections before any anatomical change are not a proven means of preventing ageing.
A preventive approach aims to correct a genuine change early, rather than creating additional volume before it is needed.
Does starting injections young mean using less hyaluronic acid later?
Starting injections very young has not been shown to reduce the total amount of hyaluronic acid needed over a lifetime.
This idea is sometimes put forward to justify preventive injections. It needs qualification.
Facial ageing continues despite injections. The skin, fat compartments, ligaments and bone structures change over time. Injected hyaluronic acid is also gradually broken down.
A subtle correction performed when a change first appears can help address it gradually, rather than requiring a more substantial correction later. However, this does not mean that injections prevent ageing.
The aim of early treatment is therefore to correct certain changes gradually while preserving facial harmony, rather than reducing in advance the amount of hyaluronic acid that will be needed in the future.
At what age should preventive hyaluronic acid injections begin?
There is no recommended age for starting preventive hyaluronic acid injections.
At the same age, needs differ according to genetics, facial morphology, skin quality, phototype, weight changes and sun exposure.
A young person may have dehydrated skin without any volume loss. Someone else may later notice gradual hollowing of the temples or a change in facial contours.
The indication should be determined by what is starting to change, rather than by having reached 25, 30 or 35.
Starting early without an indication mainly risks multiplying injections unnecessarily.
Do hyaluronic acid injections stimulate collagen production?
Yes, certain hyaluronic acid injections can stimulate collagen production, but this effect remains different from that of a collagen stimulator such as Sculptra.
Histological studies have shown that injecting cross-linked hyaluronic acid into the dermis can exert mechanical tension on fibroblasts. This stimulation can increase their activity and promote new collagen production.
However, this effect is not the main objective of every injectable hyaluronic acid. Skinboosters are mainly used to improve skin hydration and quality, whereas more structural gels restore certain volumes and tissue support.
When the primary aim is to stimulate collagen production, Sculptra is more specifically designed for this action. Hyaluronic acid is mainly used to hydrate the skin or restore volume, although it may also affect collagen production.
Does hyaluronic acid protect the skin from the sun and photoageing?
No. Hyaluronic acid injections do not protect the skin against ultraviolet radiation and never replace sun protection.
UVA and UVB cause cellular damage and accelerate the breakdown of collagen and elastic fibres. Injected hyaluronic acid does not block this radiation.
Someone who regularly has injections but exposes themselves excessively to the sun therefore continues to accumulate the damage responsible for photoageing.
When sun-related pigmentation spots or irregularities are already present, other treatments, such as certain photorejuvenation lasers, are more appropriate.
Sun protection remains the essential measure for preventing ultraviolet-related skin ageing.
Are hyaluronic acid injections enough to prevent facial ageing?
No. Hyaluronic acid injections alone cannot prevent facial ageing because they address only certain age-related changes.
Skinboosters mainly improve skin hydration and quality. More structural hyaluronic acids can restore certain volumes or improve tissue support when it starts to decrease.
Other signs of ageing require different treatments. Botulinum toxin acts on certain expression lines associated with muscle contractions. Sculptra gradually stimulates collagen production. Photorejuvenation lasers target certain signs associated with repeated sun exposure. Mesotherapy and Mesopeels can improve radiance, hydration or certain superficial skin irregularities.
Sun protection, not smoking and a suitable skincare routine remain essential, regardless of the aesthetic medicine treatments performed.
In Geneva, a preventive approach involves identifying the first signs of ageing and then choosing the corresponding treatment. Hyaluronic acid may be indicated to improve skin hydration and quality, perform a non-surgical lift or restore early volume loss. It should not be injected routinely solely to prevent facial ageing.
Article written by Dr Valeria Romano
Dr Valeria Romano supports each patient through a comprehensive approach to facial, body and intimate aesthetics, as well as skin and hair quality. Every treatment is based on a personalised medical assessment.
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