{"id":233798,"date":"2026-07-16T15:52:41","date_gmt":"2026-07-16T13:52:41","guid":{"rendered":"https:\/\/www.parisselectbook.com\/?p=233798"},"modified":"2026-07-16T15:52:46","modified_gmt":"2026-07-16T13:52:46","slug":"your-year-round-shampoo-is-quietly-wrecking-your-hair-every-summer-a-paris-dermatologist-reveals-the-swap-to-make-now","status":"publish","type":"post","link":"https:\/\/www.parisselectbook.com\/en\/2026\/07\/16\/your-year-round-shampoo-is-quietly-wrecking-your-hair-every-summer-a-paris-dermatologist-reveals-the-swap-to-make-now\/","title":{"rendered":"Your year-round shampoo is quietly wrecking your hair every summer, a Paris dermatologist reveals the swap to make now"},"content":{"rendered":"

Every summer, millions of people pack the same shampoo they use in January and head to the beach, completely unaware that their hair faces a very different set of challenges under the July sun. Chlorine, sea salt, wind and heat<\/a> form a combination that can leave any hair type dull, tangled and hard to manage. Choosing the right cleansing formula for the season, however, can make a real difference to the health and feel of your hair.<\/p>\n

Why Summer Turns Your Hair Against You<\/h2>\n

To understand the problem, it helps to know what your hair actually is. According to Dr Marie Jourdan<\/strong>, a dermatologist<\/a> based in Paris 9 and a member of the Soci\u00e9t\u00e9 Fran\u00e7aise de Dermatologie, there is a key distinction between two parts of the hair: the hair follicle, which is a living organ rooted in the scalp, and the hair shaft, which is essentially a “dead” structure made primarily of keratin.<\/p>\n

That hair shaft is the part that takes the full force of summer. Sun exposure, sea water and pool water all attack the keratin directly. As a result, the shaft dries out and becomes difficult to style. So, the challenge is not so much about deep treatment; it is about protection<\/a> and manageability.<\/p>\n

In addition, heat<\/a> causes the scalp’s sebaceous glands to produce more sebum than usual. Sweat compounds this effect. Therefore, even people with normally balanced hair may notice their roots feeling greasier during the hottest months.<\/p>\n

“We are more in the realm of camouflage than care. A coating shampoo wraps around the hair shaft to make it easier to style.” – Dr Marie Jourdan, dermatologist, Paris<\/p><\/blockquote>\n

The Coating Shampoo: Your Summer Essential<\/h3>\n

For most hair types, a coating shampoo<\/strong> is the most effective seasonal switch. This type of formula works by enveloping the hair shaft rather than stripping or treating it. The result is smoother, more manageable hair after each wash.<\/p>\n

However, the right coating shampoo depends on your specific hair type. For dry hair, look carefully at the ingredient list. Nourishing actives such as plant-based keratin, sweet almond oil, shea butter and fatty acids<\/strong> are all well suited, both for the hair shaft and for a dry scalp.<\/p>\n

These ingredients work because they add a fine, protective layer over each strand. So, even after a swim in the sea or a session in a chlorinated pool, the hair retains some of its smoothness and is far easier to detangle.<\/p>\n

Oily Hair in Summer: A Different Kind of Care<\/h2>\n

Oily hair requires a separate approach altogether. This hair type results from excessive sebum production by the sebaceous glands, which leaves the shaft heavy and visibly greasy. Moreover, summer heat directly increases that sebum output, so the problem often intensifies precisely when it is least welcome.<\/p>\n

The causes of oily hair can include pollution, hormonal changes, excess stress, or a diet high in fat and sugar. Because heat adds to this, the right summer shampoo for oily hair must focus on absorbing excess sebum<\/strong> rather than adding moisture or weight.<\/p>\n

Clay<\/strong> is the star active ingredient here. It absorbs grease effectively without harsh stripping. In contrast, all oils and any product containing them should be avoided on both the shaft and the scalp. Therefore, when reading the label of a potential shampoo, check that no plant oils appear among the main ingredients.<\/p>\n

The Washing Frequency Trap<\/h3>\n

A very common mistake with oily hair in summer is washing it too often. Frequent washing actually stimulates the sebaceous glands to produce even more sebum. As a result, you can find yourself in a cycle where the hair feels greasy again just hours after a wash.<\/p>\n

Instead, thorough rinsing with soft water between washes can be enough. This approach keeps the scalp fresh without triggering excess oil production. Spacing out your shampoo sessions, even if it feels counterintuitive, tends to give better long-term results for oily hair.<\/p>\n

    \n
  • Dry hair:<\/strong> choose a coating shampoo with plant-based keratin, sweet almond oil, shea butter or fatty acids<\/li>\n
  • Oily hair:<\/strong> opt for a clay-based shampoo and avoid all oil-containing formulas<\/li>\n
  • All hair types:<\/strong> reduce washing frequency to avoid overstimulating sebum production<\/li>\n
  • All hair types:<\/strong> use soft water for rinsing between washes<\/li>\n
  • All hair types:<\/strong> apply a protective, nourishing product based on natural ingredients to shield the shaft from summer aggressors<\/li>\n<\/ul>\n

    Sun Protection for Hair: The Step Everyone Skips<\/h2>\n

    Most people apply sunscreen to their skin without a second thought. Yet hair also needs protection from sun exposure, and this step is rarely taken. Dr Jourdan is clear on this point: hair should be protected from the sun just as the skin is.<\/p>\n

    The most straightforward solution is physical protection. Caps and hats shield the hair shaft from direct UV exposure and also reduce the heat buildup that drives sebum production. They are also the simplest way to protect colour-treated hair from fading over a long summer day.<\/p>\n

    Beyond headwear, protective hair products can also limit seasonal damage. Dr Jourdan recommends products that hydrate and coat the shaft using natural ingredients<\/strong>. These formulas act as a barrier against sun, salt and chlorine, and they complement the choice of a good seasonal shampoo rather than replacing it.<\/p>\n

    Choosing a shampoo suited to your hair type each summer is a small habit that pays off quickly. Dry or oily, fine or thick, every type of hair responds better to a formula that matches the demands of the season. A coating shampoo for dry hair, a clay-based one for oily hair, combined with protective products and sensible washing habits, gives your hair a far better chance of surviving the summer looking its best.<\/p>\n","protected":false},"excerpt":{"rendered":"

    Every summer, millions of people pack the same shampoo they use in January and head to the beach, completely unaware that their hair faces a…<\/p>\n","protected":false},"author":15,"featured_media":233799,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[110],"tags":[4563],"quartier":[],"class_list":["post-233798","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-beauty","tag-shampoo"],"acf":[],"yoast_head":"\nYour year-round shampoo is quietly wrecking your hair every summer, a Paris dermatologist reveals the swap to make now<\/title>\n<meta name=\"description\" content=\"A dermatologist reveals which shampoo to choose by hair type to protect your hair from sun, chlorine and seawater in summer 2026.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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