Can a Serum Really Give You Thicker, Healthier-Looking Hair?

Earlier this month, Deciem launched its first haircare product: The Ordinary's Multi-Peptide Serum for Hair Density (£16). The hair serum is designed to be applied topically every night and promises fuller, thicker, denser and healthier-looking hair.

Sounds great, right? So far, reviews for the Multi-Peptide Serum have been overwhelmingly positive. Fans of the serum have reported that not only does it promote growth and denser-looking hair, but many have also commented on how it helps to treat dry and flaky scalps.

It got me thinking, though: With hair loss and alopecia affecting over 2.6 million people in the UK, can a topical hair serum ever really affect your hair growth? Research suggests that up to 90% of hair thinning and loss is thought to be caused by stress, so can a topical serum treat the condition without directly tackling the cause?