Walk into any beauty aisle in the UK and you'll find an overwhelming number of face serums — all promising transformative results. The honest truth is that no single serum is "the best" for everyone. The best serum is the one that matches your skin's actual needs.
This guide breaks down what to look for, which key ingredients do what, and highlights some standout options worth your consideration in 2026.
What Is a Face Serum, and Do You Actually Need One?
A serum is a lightweight, concentrated formula designed to deliver active ingredients deeper into the skin than a moisturiser can. Because of their smaller molecular weight and higher ingredient concentration, serums can target specific concerns more precisely — whether that's hydration, brightness, firmness, or barrier repair.
Do you need one? If you have a specific skin concern — and most of us do — a serum is the most efficient way to address it. Think of your moisturiser as maintaining your baseline and your serum as your targeted treatment.
How to Choose a Serum for Your Skin Type
Dry or Dehydrated Skin
Look for: hyaluronic acid, ceramides, glycerin, squalane, and peptides. The Shiseido Ultimune Power Infusing Concentrate IV is a standout in this category — a lightweight yet intensely hydrating serum that strengthens the skin's natural immunity and barrier function. It's particularly well suited to skin that feels reactive or sensitised.
Oily or Acne-Prone Skin
Look for: niacinamide, salicylic acid, azelaic acid, and lightweight hyaluronic acid. The goal is to regulate oil production and keep pores clear without stripping the skin. Your serum should feel almost weightless.
Dull or Uneven Skin Tone
Look for: vitamin C, niacinamide, alpha arbutin, and kojic acid. Vitamin C is the gold standard here, ideally combined with a brightening toner as a prep step.
Ageing or Loss of Firmness
Look for: retinol, peptides, vitamin C, and growth factors. For those thinking about long-term firmness, the Fonce Korea Peptide Anti-Aging Face Cream works beautifully as the moisturising step after a hydrating serum — delivering peptides alongside deep hydration in one step.
Sensitive or Reactive Skin
Look for: centella asiatica, panthenol, allantoin, ceramides, and fragrance-free formulas. Niacinamide at lower concentrations (2–5%) is also excellent — calming redness without irritation.
The Serum Layering Rule
If you're using more than one serum, apply them thinnest to thickest:
- Water-based serums first (vitamin C, hyaluronic acid, niacinamide)
- Slightly thicker serums or oils second
- Moisturiser to seal
- SPF in the morning
Limit yourself to 2–3 active serums maximum in any single routine. Stacking too many actives can trigger sensitivity even in robust skin types.
Red Flags to Avoid When Buying a Serum
- Very long ingredient lists with no clear hero ingredients — complexity doesn't equal efficacy
- Heavy fragrance in a "sensitive skin" product — fragrance is the leading cause of cosmetic contact dermatitis
- Unrealistic claims — no serum fills wrinkles overnight. Weeks to months of consistent use is what delivers real results
- Opaque packaging for vitamin C — it oxidises in light and air. Look for dark glass or airtight pumps
How Long Before You See Results?
- 2–4 weeks to notice initial changes in texture and hydration
- 6–8 weeks for visible changes in tone and brightness
- 3–6 months for meaningful improvement in fine lines and firmness
Take a photo before you start, use the serum daily, and don't switch products mid-trial. Consistency is the single biggest factor in whether a serum works.
Final Thoughts
The best face serum for you is the one that targets your real skin concerns, contains proven ingredients, and fits your routine realistically. Start with one serum, use it daily, and give it time to work before adding more.
Browse our Skincare collection at My Radiance Skin — including our Shiseido Ultimune serum and Fonce Peptide Cream — chosen because they genuinely work.
