A pharmacy-trained ingredient-level analysis of what is safe, what to watch for, and what to avoid in UK baby skincare products — applied to the most popular brands on supermarket shelves.
A parent buys an “organic” baby bubble bath because the label is green and it says “gentle”. The ingredients list contains sodium lauryl sulphate, fragrance, and methylisothiazolinone. Their baby develops a rash within a week. The packaging was marketing. The ingredients were the truth.
A newborn's skin is not a small version of adult skin. The stratum corneum — the protective outer layer — is thinner and more permeable. This means chemicals applied to the skin are absorbed into the bloodstream at a higher rate and in higher concentrations than in adults. It also means the skin barrier is more easily disrupted by products that would be fine for adults.
Fragrance / parfum — the single most common cause of contact dermatitis in babies. “Natural fragrance” is not safer. Fragrance is fragrance.
Sodium lauryl sulphate (SLS) — a foaming agent that strips the natural oils from the skin barrier. Found in many baby shampoos and bubble baths marketed as gentle.
Methylisothiazolinone (MI) and methylchloroisothiazolinone (MCI) — preservatives that are potent sensitisers. Banned from leave-on products in the EU but can still appear in rinse-off products.
Parabens — preservatives with endocrine-disrupting potential at high doses. Evidence at typical cosmetic concentrations is limited, but worth avoiding in babies given the higher absorption rate.
For healthy baby skin: fragrance-free, SLS-free, dermatologically tested products. Brands specifically formulated for newborns and regularly reviewed against dermatological guidelines are a safe starting point. When in doubt, use less — not more.
For babies with eczema or at high risk of eczema (family history), daily emollient application is the cornerstone of management. Your GP can prescribe emollients on the NHS — you do not need to buy expensive over-the-counter creams.
Avoid all fragranced products. Use a soap substitute for bathing. Apply emollient immediately after bathing while skin is still slightly damp. If eczema is not controlled with emollients alone, speak to your GP about topical corticosteroids — these are safe and effective when used correctly.
NHS Baby skincare · British Association of Dermatology · MHRA Cosmetics safety · Reviewed April 2026.