The Ordinary carries the same philosophy into hair as they do into skincare: high-quality actives, straightforward formulas, no fuss. The Multi-Peptide Serum contains a blend of peptide complexes and plant-based growth factors that signal hair follicles and support density. It’s fragrance-free — which matters enormously for a sensitive post-treatment scalp.

A good starting point. Well-tolerated, affordable, and easy to incorporate into a daily routine.

L’Oréal’s Professionnel range has long been a go-to for hair professionals, and their hair growth serum has gained a loyal following among women experiencing post-treatment hair loss. The formula combines Aminexil — a clinically studied ingredient known to reinforce hair roots — with nourishing actives that help strengthen fragile new growth.

Applied directly to the scalp and left in. Simple, effective, and widely trusted.

Rhute is a brand built with hair health at its centre — and their serum has been gaining real traction among women navigating thinning and regrowth. What I appreciate about this one is the attention to the scalp as a foundation, rather than just treating the hair itself. The formula is designed to support the scalp environment that healthy hair growth depends on: balanced, nourished, and calm.

For a sensitive scalp still recovering from treatment, that approach feels right.

This one has a story worth knowing. RevitaLash was founded in 2006 by Dr Michael Brinkenhoff — an ophthalmologist who created the original lash serum as a gift for his wife while she was going through breast cancer treatment. That origin has shaped everything about the brand: the sensitivity of the formula, the care taken with ingredients, the understanding of what a woman in treatment or recovery actually needs.

Their Hair Scalp Therapy Serum uses the same BioPeptin Complex® — a peptide-rich formula that conditions the scalp and supports the appearance of fuller, stronger hair. Ophthalmologist-tested, paraben-free, and gentle enough for the most sensitive scalps. This is the one I’d reach for first.

Plantur 39 was developed in collaboration with the Dermatology Department at the University Clinic of Jena — and that clinical foundation shows. The Phyto-Caffeine Tonic uses a caffeine complex that penetrates directly into the hair follicle, where it creates a protective depot that remains active for up to 24 hours.

Applied daily to the scalp with a dosage tip, left in — no rinsing required. Available at Boots. Simple, effective, and widely recommended for women experiencing thinning and post-treatment hair loss.