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  <title>Insights Clair Clinique</title><link>https://www.clairclinique.com/blog/en/</link>
  <description>Articles that expand on the Clair Clinique Science pills, each one based on a scientific study verified on PubMed.</description><language>en</language>
  <item><title>The stratum corneum, the skin’s first line of defense</title><link>https://www.clairclinique.com/blog/en/strato-corneo.html</link>
    <guid>https://www.clairclinique.com/blog/en/strato-corneo.html</guid><pubDate>Sat, 07 Nov 2026 09:00:00 +0100</pubDate><description>The outermost layer of the skin performs many defensive functions that are linked together. A 2005 review describes them as a single system.</description></item>
  <item><title>Niacinamide and dark spots, what the studies showed</title><link>https://www.clairclinique.com/blog/en/macchie.html</link>
    <guid>https://www.clairclinique.com/blog/en/macchie.html</guid><pubDate>Fri, 06 Nov 2026 09:00:00 +0100</pubDate><description>A 2002 study tested niacinamide on facial dark spots, in the laboratory and in people. Here are the results and the mechanism observed.</description></item>
  <item><title>Vitamin C on the skin, why the formula makes the difference</title><link>https://www.clairclinique.com/blog/en/formulazione.html</link>
    <guid>https://www.clairclinique.com/blog/en/formulazione.html</guid><pubDate>Thu, 05 Nov 2026 09:00:00 +0100</pubDate><description>A laboratory study measured how much vitamin C actually gets into the skin. The result depends on the pH and concentration of the formula.</description></item>
  <item><title>Collagen, age and sex, a classic study of the skin</title><link>https://www.clairclinique.com/blog/en/collagene.html</link>
    <guid>https://www.clairclinique.com/blog/en/collagene.html</guid><pubDate>Wed, 04 Nov 2026 09:00:00 +0100</pubDate><description>A 1975 study measured skin collagen in many healthy people. It decreases with age and is lower in women at every age.</description></item>
  <item><title>How long it takes for the skin to renew itself</title><link>https://www.clairclinique.com/blog/en/rinnovo.html</link>
    <guid>https://www.clairclinique.com/blog/en/rinnovo.html</guid><pubDate>Tue, 03 Nov 2026 09:00:00 +0100</pubDate><description>The epidermis renews itself continuously. A calculation published in 1994 estimates that it takes about 47 to 48 days to replace itself completely.</description></item>
  <item><title>Cleansing and the barrier, what surfactants do to the skin</title><link>https://www.clairclinique.com/blog/en/detersione.html</link>
    <guid>https://www.clairclinique.com/blog/en/detersione.html</guid><pubDate>Mon, 02 Nov 2026 09:00:00 +0100</pubDate><description>Surfactants can stay in the skin after rinsing. A 2012 review explains how newer cleansers try to respect the skin barrier.</description></item>
  <item><title>Vitamins C and E with ferulic acid, what the laboratory showed</title><link>https://www.clairclinique.com/blog/en/vitamine-ce-ferulico.html</link>
    <guid>https://www.clairclinique.com/blog/en/vitamine-ce-ferulico.html</guid><pubDate>Sun, 01 Nov 2026 09:00:00 +0100</pubDate><description>In a laboratory study, ferulic acid made vitamins C and E more stable and doubled their protection against simulated UV rays.</description></item>
  <item><title>Daily sunscreen, what a four-and-a-half-year study showed</title><link>https://www.clairclinique.com/blog/en/protezione-solare.html</link>
    <guid>https://www.clairclinique.com/blog/en/protezione-solare.html</guid><pubDate>Sat, 31 Oct 2026 09:00:00 +0100</pubDate><description>An Australian study of 903 adults compared daily sunscreen use with occasional use. Here are the results on skin aging.</description></item>
  <item><title>Hydroxy acids and the sun, why daily protection matters</title><link>https://www.clairclinique.com/blog/en/acidi-idrossi.html</link>
    <guid>https://www.clairclinique.com/blog/en/acidi-idrossi.html</guid><pubDate>Fri, 30 Oct 2026 09:00:00 +0100</pubDate><description>Glycolic acid and other hydroxy acids are widely used ingredients. A 2010 review pays special attention to their safety on sun-exposed skin.</description></item>
  <item><title>Cold and dry air, why the skin gets more delicate in winter</title><link>https://www.clairclinique.com/blog/en/inverno.html</link>
    <guid>https://www.clairclinique.com/blog/en/inverno.html</guid><pubDate>Thu, 29 Oct 2026 09:00:00 +0100</pubDate><description>Low humidity and low temperatures weaken the skin barrier and make the skin more reactive. Here is what a 2016 review says.</description></item>
  <item><title>Peptides in a cream, what a study of 93 women showed</title><link>https://www.clairclinique.com/blog/en/peptidi.html</link>
    <guid>https://www.clairclinique.com/blog/en/peptidi.html</guid><pubDate>Wed, 28 Oct 2026 09:00:00 +0100</pubDate><description>A moisturizer with palmitoyl pentapeptide was compared with the same cream without the peptide on half of the face for 12 weeks.</description></item>
  <item><title>Petroleum jelly, what it really does to the skin barrier</title><link>https://www.clairclinique.com/blog/en/vaselina.html</link>
    <guid>https://www.clairclinique.com/blog/en/vaselina.html</guid><pubDate>Tue, 27 Oct 2026 09:00:00 +0100</pubDate><description>Petroleum jelly was thought to form a film on the surface only. A 1992 study showed that it enters the stratum corneum and helps the barrier recover.</description></item>
  <item><title>Bakuchiol and retinol compared in a 12-week study</title><link>https://www.clairclinique.com/blog/en/bakuchiolo.html</link>
    <guid>https://www.clairclinique.com/blog/en/bakuchiolo.html</guid><pubDate>Mon, 26 Oct 2026 09:00:00 +0100</pubDate><description>A double-blind study of 44 people compared bakuchiol and retinol on the signs of photoaging. Here are the results and how well each was tolerated.</description></item>
  <item><title>Vitamin E, half a century of research on the skin</title><link>https://www.clairclinique.com/blog/en/vitamina-e.html</link>
    <guid>https://www.clairclinique.com/blog/en/vitamina-e.html</guid><pubDate>Sun, 25 Oct 2026 09:00:00 +0100</pubDate><description>Vitamin E has been studied in dermatology for over 50 years. A 2007 review explains what we know and which questions remain open.</description></item>
  <item><title>Glycerin, a classic ingredient for skin hydration</title><link>https://www.clairclinique.com/blog/en/glicerina.html</link>
    <guid>https://www.clairclinique.com/blog/en/glicerina.html</guid><pubDate>Sat, 24 Oct 2026 09:00:00 +0100</pubDate><description>Glycerin has been used in creams for decades, and the skin also makes it on its own. A 2008 review sums up its effects on the skin barrier.</description></item>
  <item><title>The map of the face, each area has its own skin</title><link>https://www.clairclinique.com/blog/en/zone-viso.html</link>
    <guid>https://www.clairclinique.com/blog/en/zone-viso.html</guid><pubDate>Fri, 23 Oct 2026 09:00:00 +0100</pubDate><description>Nose, chin, neck and the area around the mouth have different skin. One study measured six skin parameters at seven sites.</description></item>
  <item><title>Retinol, what happens in the skin after four weeks</title><link>https://www.clairclinique.com/blog/en/retinolo.html</link>
    <guid>https://www.clairclinique.com/blog/en/retinolo.html</guid><pubDate>Thu, 22 Oct 2026 09:00:00 +0100</pubDate><description>A study compared retinol and retinoic acid on skin structure and genes, and measured wrinkles after 12 weeks of retinol.</description></item>
  <item><title>Artificial intelligence and selfies, how the signs of aging change</title><link>https://www.clairclinique.com/blog/en/ai-selfie.html</link>
    <guid>https://www.clairclinique.com/blog/en/ai-selfie.html</guid><pubDate>Wed, 21 Oct 2026 09:00:00 +0100</pubDate><description>An algorithm analyzed selfies of more than half a million European and Chinese women. The signs of aging evolve differently in the two groups.</description></item>
  <item><title>Sensitive skin, nearly four in ten people in Europe</title><link>https://www.clairclinique.com/blog/en/pelle-sensibile.html</link>
    <guid>https://www.clairclinique.com/blog/en/pelle-sensibile.html</guid><pubDate>Tue, 20 Oct 2026 09:00:00 +0100</pubDate><description>A survey of 4,506 people in eight European countries shows how common sensitive skin is. Italy and France had the highest rates.</description></item>
  <item><title>Ceramides, the barrier lipids your skin already knows</title><link>https://www.clairclinique.com/blog/en/ceramidi.html</link>
    <guid>https://www.clairclinique.com/blog/en/ceramidi.html</guid><pubDate>Mon, 19 Oct 2026 09:00:00 +0100</pubDate><description>Ceramides are natural skin lipids that matter for the barrier. A 2014 review explains what they are and why so many creams contain them.</description></item>
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