What should you know about Vichy 89 skin fortifying daily booster?

A daily booster is spread over the skin rather than injected into it. Its role is cosmetic: helping the surface feel hydrated and less tight when used with a suitable moisturiser. It does not replace sunscreen, and it cannot remove established sun damage or diagnose a skin disorder. For persistent roughness or pigment change, learn about [Sun-Damaged Skin](/conditions/photoaging/). The term can be confusing because injectable [Skin Boosters](/treatments/injectables/skin-booster-treatment/) are a separate procedure.

Use a small amount on clean skin according to the product directions, and layer moisturiser or sunscreen as needed. Avoid introducing it at the same time as several new active products. If your skin is sensitive, test a small area first and read the ingredients for known allergens. Keep the bottle away from heat and follow its storage instructions. Stop if you develop ongoing stinging, redness, swelling, or scaling; a cosmetic product should not be used to push through a reaction.

Contact a clinician for facial swelling, hives, blistering, eye irritation, or breathing symptoms after use. Arrange a skin assessment when a rash, acne flare, itching, or pigmentation continues despite stopping the product. If a clinic has recommended an injection under the same name, pause and ask for the exact product and treatment plan. A topical serum and a [Hyaluronic Acid Filler](/materials/hyaluronic-acid-filler/) have different purposes, methods, and risks.

Ask whether the booster fits your current routine, whether any ingredient conflicts with prescription treatment, and how to manage irritation. If you are considering an injectable option, ask who will perform it, what material is used, and what aftercare is expected. Share any history of allergy, eczema, or reactions to skincare products.