{"product_id":"nioxin-system-4-scalp-hair-thickening-treatment-6-8-fl-oz-leave-in-serum-for-color-treated-hair-uv-protection","title":"NIOXIN System 4 Scalp + Hair Thickening Treatment 6.8 fl oz — Leave-In Serum for Color-Treated Hair, UV Protection","description":"\u003cp\u003e\u003cstrong\u003eNioxin System 4 Scalp + Hair Thickening Treatment is a leave-in serum formulated to nourish the scalp and increase hair diameter for color-treated hair experiencing progressed thinning.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis professional-strength leave-in is the third step in Nioxin’s System 4 regimen, designed specifically for color-treated, damaged hair with advanced thinning. The lightweight formula delivers botanicals, antioxidants, and UV-protection ingredients directly to the scalp to help refresh the scalp environment, fortify hair strands, and visibly enhance thickness and fullness when used consistently with the matching System 4 cleanser and conditioner.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this treatment help hair that’s been colored and weakened?\u003c\/h3\u003e\n\u003cp\u003eThe formula targets the scalp and hair fiber to reduce breakage and support thicker-looking strands without weighing hair down. Ingredients work to strengthen hair structure while protecting color-treated strands from environmental stressors.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLeave-in serum increases hair diameter at the shaft for fuller appearance.\u003c\/li\u003e\n  \u003cli\u003eContains UV-protecting components to shield color from fading.\u003c\/li\u003e\n  \u003cli\u003eBotanical antioxidants help defend against oxidative stress on weakened hair.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat makes this product part of a three-step system?\u003c\/h3\u003e\n\u003cp\u003eNioxin System 4 is a coordinated regimen: a cleanser, a scalp therapy conditioner, and this Scalp + Hair Thickening Treatment. Each step addresses scalp health, follicle environment, and strand strength so the regimen works synergistically to improve hair density appearance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStep 1: Cleanser shampoo removes excess oils and impurities from the scalp.\u003c\/li\u003e\n  \u003cli\u003eStep 2: Scalp Therapy Conditioner smooths and strengthens color-treated hair.\u003c\/li\u003e\n  \u003cli\u003eStep 3: Leave-in treatment delivers targeted nutrients and diameter-boosting benefits.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I use the leave-in serum for best results?\u003c\/h3\u003e\n\u003cp\u003eApply the treatment to a towel-dried scalp and distribute it evenly through the roots to ends; do not rinse. Use after the System 4 shampoo and conditioner and incorporate into your routine daily or as directed for consistent improvement in fullness appearance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUse on clean, damp hair for optimal absorption.\u003c\/li\u003e\n  \u003cli\u003eApply directly to the scalp and massage gently to enhance delivery.\u003c\/li\u003e\n  \u003cli\u003eStyle as usual—no rinsing required, safe for color-treated hair.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat tangible benefits can I expect and how quickly?\u003c\/h3\u003e\n\u003cp\u003eUsers report noticeable textural changes and improved fullness with regular use; many see visible improvement within a month when following the complete System 4 routine. Benefits focus on appearance—thicker-looking strands, increased fullness, and a refreshed scalp environment rather than guaranteed hair regrowth.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePerceptible increase in fullness and hair density in consumer studies.\u003c\/li\u003e\n  \u003cli\u003eHelps reduce breakage to protect existing hair color and length.\u003c\/li\u003e\n  \u003cli\u003eNourishing actives support a healthier-feeling scalp where hair emerges.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Nioxin System 4 Scalp + Hair Thickening Treatment is formulated for people with color-treated, dry or damaged hair experiencing progressed thinning who want a salon-grade, leave-in solution that focuses on scalp health, strand strength, and improved thickness appearance. It’s suited to anyone seeking a targeted finishing step to pair with a thinning-hair shampoo and conditioner to maximize visible fullness and protect colored hair from added stress.\u003c\/p\u003e\n\n\u003ch3\u003eIngredients\u003c\/h3\u003e\n\u003cp\u003eAqua, Phenylbenzimidazole Sulfonic Acid, Niacinamide, Benzophenone-4, Caffeine, Polysorbate 20, Sodium Hydroxide, Benzyl Alcohol, Sodium Benzoate, Phenoxyethanol, PEG-12 Dimethicone, Citric Acid, Cocamidopropyl Betaine, Acetamide MEA, Isopropyl C12-15-Pareth-9 Carboxylate, Tetrasodium EDTA, Propylene Glycol, Methyl Nicotinate, Sodium Chloride, Parfum, Polysorbate 60, Polysorbate 80, Mentha Piperita Oil, Mentha Arvensis Leaf Oil, Menthol, PEG-23M, Camellia Sinensis Leaf Extract, Limonene, Cystine Bis-PG-Propyl Silanetriol, Biotin, Lecithin, Tocopheryl Acetate, Foeniculum Vulgare Fruit Extract, Silica, Faex Extract, Acer Saccharum Extract, Citrus Limon Peel Extract, Saccharum Officinarum Extract, Vaccinium Myrtillus Leaf Extract, Citrus Aurantium Dulcis Fruit Extract, Potassium Sorbate\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this on bleached or highlighted hair?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It’s formulated for color-treated and chemically processed hair to help protect and strengthen strands without stripping color.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I apply the Scalp + Hair Thickening Treatment?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Apply to clean, towel-dried hair daily or as directed after shampoo and conditioning for best visible results.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"NIOXIN","offers":[{"title":"Default Title","offer_id":57794267185484,"sku":"B0054Y0PMK","price":55.42,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1005\/5912\/6860\/files\/nioxin-front-packaging.jpg?v=1781477656","url":"https:\/\/belvera.co.uk\/products\/nioxin-system-4-scalp-hair-thickening-treatment-6-8-fl-oz-leave-in-serum-for-color-treated-hair-uv-protection","provider":"Belvera | British Beauty, Skin Care \u0026 Personal Wellness","version":"1.0","type":"link"}