Based on its ingredients, is this serum safe for people with sensitive teeth or enamel?

Yes, the serum is formulated for sensitive teeth: it uses low‑abrasive hydrated silica, includes hydroxyapatite and potassium citrate to reinforce enamel, and adds fluoride for decay protection, making it effective for sensitivity relief; however, it also contains fragrance and preservative agents such as limonene, benzyl alcohol and phenoxyethanol that can irritate especially sensitive oral tissues.

What is the role and benefit of hydroxyapatite in this dental serum?

Hydroxyapatite is a calcium‑phosphate mineral that mimics the natural composition of tooth enamel; when applied it deposits microscopic crystals into enamel pores, helping to rebuild mineral loss, reduce dentin exposure and thus alleviate tooth sensitivity.

How often should the serum be applied and does it contain any controversial chemicals?

The manufacturer recommends applying the serum once daily after brushing, with a second application possible for severe sensitivity; the formula contains preservatives such as phenoxyethanol and benzyl alcohol and a fragrance component limonene, which are approved for use but are sometimes flagged by consumers as controversial ingredients.

Unilever, Signal • 35 ml

Signal Soin Sérum Sensibilité Email

Serums Dentaires

Product Insights

Signal Soin Serum Sensibilite Enamel is a 35 ml plastic‑packaged dental serum made in Thailand and sold in France, designed to relieve tooth sensitivity and protect enamel. Its formula combines glycerin for moisture, hydroxyapatite and potassium citrate to promote remineralisation, and fluoride (sodium monofluorophosphate) for cavity protection, offering a targeted benefit for sensitive teeth. However, the product also contains several synthetic preservatives such as benzyl alcohol, phenoxyethanol, ethylhexylglycerin and fragrance ingredients like limonene, which may irritate some users, and its plastic container is not readily recyclable.

Comparative Analysis

Positioned as a premium enamel‑sensitivity serum, it differentiates itself from standard toothpastes by delivering a high concentration of hydroxyapatite and fluoride in a fast‑acting liquid format, targeting consumers seeking professional‑grade desensitisation without brushing.

Ingredients

Aqua, Glycerin, Hydrogenated Starch Hydrolysate, Hydrated Silica, Potassium citrate, Hydroxyapatite, Steareth-30, Xanthan gum, PVM/MA Copolymer, Benzyl alcohol, Phenoxyethanol, Trisodium phosphate, Ethylhexylglycerin, Aroma, Zinc Sulfate, Sodium Monofluorophosphate, Gellan gum, Sodium Saccharin, Synthetic Fluorphlogopite, Lecithin, Mica, Tocopherol, Tin Oxide, Limonene, CI 77891

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