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Urea

Urea ādas kopšanā: Humectant below 10%, keratolytic above. Ko tas dara uz ādas, cik spēcīgi patiesībā ir pierādījumi aiz apgalvojuma, koncentrācijas parastā lietošanā, kas uz to reaģē un kāda ir situācija grūtniecības laikā un saulē. Uz etiķetes tas parādās kā Urea.

Hidratācija, mīkstinoši līdzekļi un barjeras atjaunošanaHumectant below 10%, keratolytic abovePierādījumi:Spēcīgs

Uz etiķetes:Urea. Sauc arī:Carbamide.

Šī ir sastāvdaļu uzziņu informācija, nevis diagnoze un nevis ārstēšanas plāns. Tā apraksta, kas ir šīs vielas un ko apstiprina publicētie pierādījumi; tā nepasaka, kas ir jūsu ādai vai ko uz tās likt. Izsitumi, kas izplatās, sāp, tek, nepāriet vai ko pavada slikta pašsajūta, ir iemesls apmeklēt ārstu vai farmaceitu, nevis nomainīt serumu.

Kas tas ir

A small molecule that is part of the skin's own natural moisturising factor, and one of the few ingredients whose behaviour changes completely with concentration. Cosmetic and pharmaceutical urea is synthesised industrially from ammonia and carbon dioxide; it is not collected from anything, which is worth stating plainly because the name puts people off.

Ko tas dara uz ādas

Below about 10% it acts as a humectant, binding water inside the outer layer and increasing its flexibility. At 10% and above it becomes keratolytic: it breaks down the keratin holding thickened, hardened skin together. That is why heel balms run at 20-40% and why 40% preparations are used to soften nails and thick calluses. One ingredient, two jobs, and the percentage tells you which one you bought.

Cik vērti ir pierādījumi

Pierādījumi:Spēcīgs

Strong and long-standing in dermatology for dry, scaly and thickened skin, including the inherited scaling disorders and the rough bumps of keratosis pilaris. It is one of the ingredients where the clinical literature is older and deeper than the cosmetic marketing around it.

Kā to lieto

A 5-10% cream for generally dry skin on body or face; 20-40% on heels, elbows and calluses, applied at night, ideally under a cotton sock. It works markedly better on skin that is still damp. For thickened heels, urea plus a pumice or foot file after a few days does more than either alone.

Tipiskā koncentrācija parastā lietošanā:5% face and body, 20-40% feet. Tas ir tirgus apraksts, nevis ieteikums, un tā nav deva.

Kas uz to reaģē

It stings sharply on fissured, cracked or inflamed skin — the deep cracks in a heel are exactly where people apply it and exactly where it burns. High-strength products are not for the face. On broken skin, heal the crack first with a plain ointment, then start urea.

Grūtniecība un barošana ar krūti

Parasti tiek uzskatīts par pieņemamu

No pregnancy concerns at cosmetic strengths. High-strength keratolytic preparations are worth mentioning to your midwife simply because they are closer to a medicine than a moisturiser.

Saules gaisma

Nav izmaiņu

No effect on light sensitivity.

Noteikumi un marķējums

Permitted in cosmetics; the high-strength preparations for nails and calluses are often sold as medical devices or medicines rather than cosmetics, depending on the claim.

Ar ko tas sader un ar ko ne

Urea and lactic acid together in a body lotion is one of the best-supported combinations for rough, dry skin. Under an occlusive layer or an overnight sock, effectiveness on heels roughly doubles for no extra cost.

Viena lieta, ko cilvēki saprot nepareizi

The myth is about where it comes from — the word alone convinces people it is an animal by-product. It is made from ammonia and carbon dioxide in a chemical plant, in the same process that makes agricultural fertiliser. The second and more useful correction: a 5% cream and a 40% heel balm are not strong and stronger versions of the same product, they do different things.

Avoti: ES Kosmētikas regula (EK) Nr. 1223/2009 un tās pielikumi, kā publicēts Eiropas Komisijas CosIng datubāzē, attiecībā uz katru apgalvojumu par to, kas ir atļauts, ierobežots vai aizliegts · Patērētāju drošības zinātniskās komitejas (SCCS) atzinumi un Cosmetic Ingredient Review (CIR) drošības novērtējumi attiecībā uz koncentrāciju nostājām · standarta dermatoloģijas uzziņu materiāli par mehānismu, panesamību un kontaktalerģijas modeļiem · pārbaudīts2026-09-06. Tiešās saites ir apzināti izlaistas tur, kur nebija iespējams apstiprināt stabilu publisku URL.

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