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    <title>Skincare on noema</title>
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      <title>An honest routine: few actives, right doses, consistency</title>
      <link>https://noema.sindro.me/posts/2026/routine-skincare-pochi-attivi/</link>
      <pubDate>Thu, 30 Apr 2026 00:00:00 +0000</pubDate>
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      <description>&lt;blockquote&gt;&#xA;&lt;p&gt;&lt;strong&gt;Abstract.&lt;/strong&gt; A rational skincare routine is much shorter than the cosmetics industry&amp;rsquo;s narrative suggests. Three products can do 80% of the job; five cover almost every real need. Here I lay out a practical synthesis: the minimal routine for those without specific concerns, the complete routine for anyone targeting photo-ageing or dyschromia, the order of application, the most common mistakes, and when it makes sense to move from the bathroom mirror to the aesthetic-medicine chair. Third and final part of a series, in continuity with &lt;a href=&#34;https://noema.sindro.me/posts/2026/skincare-attivi-e-medical-grade/&#34;&gt;&lt;em&gt;Skincare: actives, concentrations and medical grade&lt;/em&gt;&lt;/a&gt; — the second part, devoted to the actives applied at home and to the real difference between over-the-counter and &lt;em&gt;medical grade&lt;/em&gt; products.&lt;/p&gt;&#xA;&lt;/blockquote&gt;&#xA;&lt;p&gt;By this point in the series we have dismantled a lot. Most of the heavily marketed aesthetic-medicine treatments don&amp;rsquo;t have the evidence the marketing suggests. Most of the trendy skincare ingredients don&amp;rsquo;t do what they promise. Most of the routines described by magazines and social channels are oversized, underdosed, or both.&lt;/p&gt;&#xA;&lt;p&gt;One practical question remains. &lt;em&gt;So what do I put on, in what order, how often?&lt;/em&gt;&lt;/p&gt;&#xA;&lt;p&gt;The honest answer is short. Three or four products, used consistently for months, do the job most people are after when they walk into a beauty store with a shopping list of thirteen items. Adding products rarely improves the result — more often it makes it worse, irritating skin that would have responded better to less.&lt;/p&gt;&#xA;&lt;p&gt;This third part is the practical synthesis of the first two. Nothing new, but everything pulled together.&lt;/p&gt;</description>
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      <title>Skincare: actives, concentrations, and medical grade</title>
      <link>https://noema.sindro.me/posts/2026/skincare-attivi-e-medical-grade/</link>
      <pubDate>Mon, 27 Apr 2026 00:00:00 +0000</pubDate>
      <guid>https://noema.sindro.me/posts/2026/skincare-attivi-e-medical-grade/</guid>
      <description>&lt;blockquote&gt;&#xA;&lt;p&gt;&lt;strong&gt;Abstract.&lt;/strong&gt; Almost all mass-market skincare is under-dosed, unstable, or poorly formulated. Almost all &lt;em&gt;medical grade&lt;/em&gt; skincare costs more — but not always for the right reasons. Here I draw the line on what &amp;ldquo;active&amp;rdquo; really means in a cosmetic (concentration, pH, vehicle, penetration, stability), which pillars of the dermatological literature actually hold up (retinoids, vitamin C as L-ascorbic acid, niacinamide, azelaic acid, AHA/BHA), and which are the more recent fashions selling mostly stand-in ingredients: cosmetic peptides, bakuchiol as &amp;ldquo;natural retinol&amp;rdquo;, snail mucin, plant stem cells. And why — beyond a certain marketing premium — medical grade products often have technical reasons to cost more. Second part of a three-part series, after &lt;a href=&#34;https://noema.sindro.me/posts/2026/medicina-estetica-evidenza-e-marketing/&#34;&gt;&lt;em&gt;Aesthetic medicine: what works, what is marketing&lt;/em&gt;&lt;/a&gt;.&lt;/p&gt;&#xA;&lt;/blockquote&gt;&#xA;&lt;p&gt;In the cosmetics aisle of a pharmacy or in the pages of a skincare e-commerce site, ingredients turn up everywhere. &lt;em&gt;Vitamin C, retinol, peptides, hyaluronic acid, niacinamide, ceramides, plant oils, botanical extracts&lt;/em&gt;. The promise is always the same — younger, firmer, brighter, more protected skin — and the vocabulary is almost identical between an eight-euro serum and a hundred-and-twenty-euro cream.&lt;/p&gt;&#xA;&lt;p&gt;There is a problem, and it is hard to fit on a label. A &lt;em&gt;cosmetic&lt;/em&gt; works — when it does work — because it contains a sufficient amount of a molecule with proven efficacy, formulated so that it stays stable, and delivered so that it crosses the stratum corneum enough to do something. Almost the entire mass-market skincare industry trades on the &lt;em&gt;perception of efficacy&lt;/em&gt; — pleasant texture, fragrance, bottle design, marketing claims — more than on actual efficacy. It is not a scam: it is a sector with an enormous grey area between &amp;ldquo;contains an active ingredient&amp;rdquo; and &amp;ldquo;does what it promises&amp;rdquo;.&lt;/p&gt;</description>
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      <title>Aesthetic medicine: what works, what is marketing</title>
      <link>https://noema.sindro.me/posts/2026/medicina-estetica-evidenza-e-marketing/</link>
      <pubDate>Sat, 25 Apr 2026 00:00:00 +0000</pubDate>
      <guid>https://noema.sindro.me/posts/2026/medicina-estetica-evidenza-e-marketing/</guid>
      <description>&lt;blockquote&gt;&#xA;&lt;p&gt;&lt;strong&gt;Abstract.&lt;/strong&gt; Aesthetic medicine is one of the medical fields where the gap between scientific evidence and advertising narrative is widest. Some treatments have thirty years of solid literature behind them; others were born yesterday and live on sponsored trials and photographic promises. Here I draw the line, one by one, between what has real clinical foundations (botulinum toxin, hyaluronic acid fillers, some lasers, peels), what has an interesting biological rationale but evidence still being built (Profhilo, polynucleotides such as Plinest, new-generation biostimulators like Ellansé and Juvelook), and what travels almost entirely on marketing (HIFU as a &amp;ldquo;lift&amp;rdquo;, injectable vitamin cocktails, mesotherapy, carboxytherapy). First of a three-part series, written for those who want to understand before they choose; the second part is &lt;a href=&#34;https://noema.sindro.me/posts/2026/skincare-attivi-e-medical-grade/&#34;&gt;&lt;em&gt;Skincare: actives, concentrations and medical grade&lt;/em&gt;&lt;/a&gt;.&lt;/p&gt;&#xA;&lt;/blockquote&gt;&#xA;&lt;p&gt;When you walk into an aesthetic-medicine clinic, you are usually handed a menu. Toxin, fillers, biostimulators, skinboosters, polynucleotides, injectable vitamins, next-generation lasers, scalpel-free lifts, peels, microneedling, PRP. Prices change, names change every year, the promises do not: &amp;ldquo;natural rejuvenation&amp;rdquo;, &amp;ldquo;skin quality&amp;rdquo;, &amp;ldquo;collagen stimulation&amp;rdquo;, &amp;ldquo;lifting effect&amp;rdquo;. But behind this menu — almost always presented in identical language — lies an enormous gap in scientific evidence. Some treatments have thirty years of independent literature, randomised trials, well-documented safety profiles. Others have a handful of studies, often manufacturer-sponsored, and a mechanistic rationale that sounds convincing — but is not yet clinical evidence. Others still are pure narrative, propped up by before-and-after photos and the perceived authority of whoever is offering them.&lt;/p&gt;&#xA;&lt;p&gt;There are two mirror-image mistakes when discussing aesthetic medicine. The first is wholesale rejection — &amp;ldquo;it&amp;rsquo;s all vanity, it&amp;rsquo;s all marketing, it&amp;rsquo;s all dangerous&amp;rdquo;. This is wrong because many treatments really do work, have medical as well as aesthetic indications, and improve the quality of life of those who choose them with awareness. The second is blind enthusiasm — &amp;ldquo;if it&amp;rsquo;s new it&amp;rsquo;s better, if it costs more it&amp;rsquo;s better, if everyone is doing it, it must mean something&amp;rdquo;. This is wrong because aesthetic medicine is one of the fields where marketing innovation systematically precedes clinical innovation, and where many technologies we now consider obsolete are still on sale.&lt;/p&gt;</description>
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