Medik8 Hydr8 B5 Serum
Premium hydration support for tight, sensitive and reactive skin.
Quick verdict
Medik8 Hydr8 B5 Serum is a premium hydration serum for sensitive skin that wants simple, dependable water support without unnecessary extras. It offers a refined, hydration-first formula built around vitamin B5 and hyaluronic acid.
Why it made the cut
Hydr8 B5 works well in sensitive-skin routines because it does not try to be everything at once. It is focused on hydration first, which makes it especially useful when skin feels tight, dry from indoor heating, or slightly uncomfortable under daily sunscreen use. It also layers very easily under almost any moisturiser, which is why it works so well as a “quiet anchor” product in a minimalist routine.
Where to buy
Cult Beauty
Typical UK price £43–£47 for 30ml. Check the retailer for the current price and availability.
Green List analysis
This formula keeps the ingredient story very tight, focusing on water-binding support first and comfort second.
- panthenol — comfort and moisture support
- Hyaluronic Acid Family (Sodium Hyaluronate) — water-binding hydration support
Full INCI
Show full ingredient list
Aqua (Water) ● Panthenol ● Sodium Hyaluronate ● Calcium Pantothenate ● Phenoxyethanol ● Ethylhexylglycerin ● Citric Acid
Ingredient list source: Cult Beauty, checked 6 September 2026.
For the latest information, review the ingredient list printed on the product packaging before use.
Last reviewed: 10 September 2026