Haircare has come a long way from basic shampoos and conditioners. In 2025, it’s all about skincare-inspired ingredients that strengthen, repair, and protect hair like never before. At Shelley and Co, we believe your hair deserves the same science-backed care as your skin. That’s why we stock some of the world’s most advanced formulas—packed with innovative ingredients proven to transform your hair health.
If you’ve ever wondered what makes modern haircare so effective (and why everyone is raving about “glass hair” and stronger strands), here’s a closer look at the hero ingredients behind the results—and where you’ll find them in our curated collections.
🌿 1. Hyaluronic Acid: Deep Hydration and Plumping
Why it’s a game changer:
Hyaluronic acid acts like a moisture magnet. It draws water into the hair fibre, plumping each strand for a fuller, smoother appearance. Think of it as a big glass of water for dry or dehydrated hair.
Best for:
-
Dry, brittle hair
-
Frizz control
-
Fine hair lacking volume
Try it in:
✨ Kérastase Gloss Absolu Bain Hydra-Glaze Shampoo and Insta-Glaze Conditioner
This duo floods the hair with hydration while creating a smooth, glossy finish that feels weightless.
✨ 2. Glycolic Acid: Smoothing and Surface Renewal
Why it’s a game changer:
Known in skincare for gentle exfoliation, glycolic acid helps break down residue on the hair surface, sealing the cuticle so light can reflect evenly. The result? Mirror-like shine.
Best for:
-
Dull, lacklustre hair
-
Rough texture
-
Long hair prone to tangling
Try it in:
✨ Kérastase Gloss Absolu Bain Hydra-Glaze and Glaze Drops Hair Oil
These formulas exfoliate and smooth in one step, creating the perfect foundation for glass hair.
👉 Shop Gloss Absolu Bain and Oil
🌸 3. Wild Rose Oil: Nourishment and Frizz Control
Why it’s a game changer:
Wild rose oil is rich in fatty acids and antioxidants, delivering a luxurious, silky finish without weighing hair down. It also helps protect from environmental damage.
Best for:
-
Frizz and flyaways
-
Sensitised or colour-treated hair
-
Adding softness and shine
Try it in:
✨ Kérastase Gloss Absolu Glaze Drops Hair Oil
Just a few drops leave hair smooth, shiny, and beautifully scented.
🌱 4. Biomimetic Peptides: Repairing Damage From Within
Why it’s a game changer:
Peptides are tiny chains of amino acids that mimic the proteins naturally found in healthy hair. They penetrate deep into the cortex to rebuild strength and resilience.
Best for:
-
Severely damaged or chemically treated hair
-
Breakage and split ends
-
Weak, fragile strands
Try it in:
✨ K18 Molecular Repair Hair Mask
This leave-in treatment uses a patented peptide to reconnect broken keratin chains, reversing years of damage in just 4 minutes.
💧 5. Salicylic Acid: Scalp Clarifying and Detoxifying
Why it’s a game changer:
Salicylic acid gently dissolves oil, flakes, and build-up on the scalp, creating the ideal environment for healthier hair growth.
Best for:
-
Oily scalps
-
Product build-up
-
Flaky or congested roots
Try it in:
✨ Kérastase Specifique Bain Divalent Shampoo
This balancing cleanser purifies oily roots while keeping lengths soft and hydrated.
🌾 6. Biotin: Strength and Growth Support
Why it’s a game changer:
Biotin (Vitamin B7) is known to help support keratin production, improving hair strength and resilience over time.
Best for:
-
Weak, thinning hair
-
Improving overall density
-
Supporting healthy growth
Try it in:
✨ Oribe Serene Scalp Thickening Treatment Spray
This targeted treatment nourishes the scalp and hair follicles while adding instant fullness to fine hair.
✨ Bring Innovation Into Your Daily Haircare
At Shelley and Co, we’ve carefully selected haircare that combines science, luxury, and proven results. Whether you’re targeting dryness, breakage, dullness, or scalp imbalance, these cutting-edge ingredients can transform your hair from the inside out.