Choosing a face serum: a practical guide to hydration, glow and an even skin tone

A face serum usually contains a higher concentration of specific ingredients than a regular cream. This means it can target concerns such as dry skin, a dull complexion, pigmentation, fine lines or a weakened skin barrier. But choosing the right one isn’t just about an eye-catching promise on the packaging. Start by checking the ingredients list, directions for use and texture.

Common mistakes when buying a serum

1. Assuming a higher percentage is always better

A vitamin C serum with a high concentration may sound appealing, but pure ascorbic acid can cause stinging or redness for some skin types. Niacinamide, retinol and exfoliating acids also need to be introduced gradually. A lower percentage or a more stable derivative may be more practical for everyday use.

Pay attention to the form of the ingredient, too. 3-O-ethyl ascorbic acid, for example, is a vitamin C derivative, while ascorbic acid is the pure form. These ingredients aren’t directly comparable.

2. Focusing only on marketing claims

Words such as “lifting”, “glow” or “regenerating” don’t automatically guarantee a result. According to brands’ own product information, ingredients such as peptides, niacinamide or PDRN may help skin look smoother, more hydrated or firmer. These are not medical effects, and results vary from person to person.

So, focus on checking:

• the full ingredients list;
• the recommended frequency of use;
• the size, for example 15, 30, 50 or 100 ml;
• the expiry date and period after opening;
• any warnings about fragrance, essential oils or sun sensitivity.

3. Combining too many active ingredients at once

Using a vitamin C serum, retinol serum, exfoliant and pigmentation serum on the same evening can make your routine unnecessarily harsh. Start with one goal, such as hydration or a more even skin tone. Add a second active product later only if your skin tolerates the first one well.

Important specifications to consider in a face serum

Match the ingredients to your skin goals

Choose a serum based on the concern you want to address every day:

• Hydration: Glycerine, hyaluronic acid, betaine, panthenol and ceramides help attract or retain moisture. A hydrating serum may suit you if your skin feels tight.
• Dull skin or uneven skin tone: Vitamin C, niacinamide, tranexamic acid and certain plant extracts are often found in formulas designed to give skin a radiant look.
• Firmness and fine lines: Peptides, adenosine, ceramides and bakuchiol are often used in firming serums. According to a brand’s own research or product information, these are cosmetic ingredients intended to help skin look smoother or firmer; they are not a substitute for medical treatment.
• Pigmentation: A serum for pigmentation may contain ingredients such as vitamin C, niacinamide, arbutin, tranexamic acid or kojic acid. Always use sun protection during the day if the packaging advises you to do so.
• Sensitive skin: Look for a short, easy-to-follow ingredients list, and be cautious with fragrance, alcohol denat., bergamot oil, lavender oil and strong retinoids.

Concentration and stability

A percentage only tells you something useful when you know which substance and form it refers to. Packaging matters with vitamin C, too: light, heat and air can cause some formulas to discolour or oxidise more quickly. Store the product according to the label and close the packaging straight after use.

Retinol serums and retinal products are generally used in the evening. Introduce them gradually and apply sun protection the following morning. For example, the celimax product below recommends using it every other evening for the first two weeks, and applying a small amount.

Texture, size and shelf life

A watery serum feels light and often sits well under a day cream. A milky or gel texture may feel more comfortable on dry skin. Don’t just look at the price per bottle; check the size and dosage, too. With careful use, a 15 ml bottle may last longer than a larger one with a generous pump dosage.

Check the expiry information on the packaging when your order arrives. Product details on a webshop can change, so always follow the information on the label of the product you receive.

Recommendations by user profile

Suitable for: Budget-conscious beginners

Melvita ÁRGAN BIO-ACTIVE Argan Bio-Active Serum 30ml

Why it suits this profile: A compact formula with glycerine, hyaluronic acid and argan oil for anyone looking for a simple hydrating serum without an elaborate routine.

How this product avoids the pitfall

The ingredients list lets you check the main humectants for yourself. However, bear in mind that it contains alcohol denat. and fragrance if your skin is sensitive to them.

Main benefit & highlights

30 ml size, hyaluronic acid in the formula and a stated period after opening of 6 months.

Suitable for: Targeted use & experienced users

celimax THE VITA-A RETINAL SHOT TIGHTENING BOOSTER 15ml

Why it suits this profile: A targeted choice for anyone who wants to introduce a retinal product gradually into their evening routine.

How this product avoids the pitfall

The directions specify 0,1% retinal, night-time use, a small amount and gradual introduction. This can help prevent overuse.

Main benefit & highlights

0,1% retinal, 3% Matrixyl 3000 according to the product description, and a clear warning about sun sensitivity.

Suitable for: Sensitive or dry skin

iUNIK Propolis Vitamin Synergy Serum 50ml

Why it suits this profile: The brand description lists propolis, niacinamide, glycerine and hyaluronic acid, making it a good fit if you’re looking for a nourishing Korean skincare serum texture.

How this product avoids the pitfall

Check the full ingredients list first: the formula contains bergamot oil and limonene, among other ingredients. If you have sensitive skin, try a small patch test first.

Main benefit & highlights

50 ml size, propolis extract high on the ingredients list and sodium hyaluronate in the stated formula.

How to add a serum to your routine safely

1. Cleanse your face and gently pat your skin dry.
2. Apply a small amount of serum. Follow the dosage on the label.
3. Follow with a moisturiser, especially if you have dry or sensitive skin.
4. Apply broad-spectrum sun protection during the day if the product advises you to do so.
5. Test new active ingredients on a small area of skin first. Stop using the product if irritation persists, and ask a doctor or pharmacist if you’re unsure.

Don’t assume you should use vitamin C, niacinamide, peptides, bakuchiol or PDRN all at once. A simple routine that you use consistently is easier to manage than several serums that may overlap.

Frequently asked questions about face serums

When should you apply a face serum?

Usually after cleansing and, if you use one, toner, but always follow the product instructions. A lightweight serum can be applied before a cream. Retinal and retinol products are generally intended for evening use.

How long does a serum last?

Shelf life varies depending on the formula and packaging. Check the expiry date and the period-after-opening symbol, for example 6M. Store your serum in a cool, dry place away from direct sunlight. Vitamin C serums may discolour more quickly when exposed to heat or light.

Which serum is suitable for sensitive skin?

Choose a formula with a limited number of active ingredients, and check for fragrance, essential oils, alcohol denat. and retinoids. Introduce a serum for sensitive skin gradually. A patch test can’t guarantee you won’t react, but it may help you spot a potential reaction sooner.