Joybuy Insights

Choosing a face serum: compare ingredients, skin type and usage without falling for marketing traps

A face serum can be a useful addition to your daily skincare routine, but not every serum suits every skin type. Are you mainly looking for hydration, a more even complexion, less visible pores or support for fine lines? It’s more important to look at the formula and usage instructions than at big promises on the packaging.

As a Joybuy Product Recommendation Officer, I filter product information for practical details. This helps you avoid paying for a trendy ingredient that doesn’t suit your skin type or routine.

Three common pitfalls when buying a serum

1. A high percentage doesn’t tell you everything

A vitamin C serum with 12% ascorbic acid sounds clear-cut, but skin tolerance, acidity, packaging and how it works with other ingredients all affect how comfortable the product feels on your skin. A niacinamide serum with 10% isn’t automatically more suitable than one with a lower concentration either.

Also be wary of claims such as “works deep within the skin” or “stimulates collagen”. A brand may make these claims based on its own research or product description, but they don’t guarantee the same results for every user.

2. Too many active ingredients at once

Using a retinol serum, vitamin C serum and exfoliating product in the same routine can leave your skin feeling uncomfortable. Layering isn’t always practical, especially if you have sensitive or dry skin.

Start with one active product. Use it as directed on the label, and only add a second product later if your skin tolerates it well.

3. “For all skin types” doesn’t always mean problem-free

A serum for all skin types may have a light texture but still contain fragrance, alcohol, retinol or other ingredients that not everyone finds comfortable. Always check the full ingredients list and any warnings.

It’s a good idea to patch test on a small area of skin, especially if your skin is sensitive. Stop using the product if redness, itching or irritation persists.

Which specifications should you check?

1. Choose the active ingredient to suit your goal

  • Hydration: look for glycerin, hyaluronic acid, sodium hyaluronate, panthenol or beta-glucan. A hydrating serum usually works well under a cream.
  • Fine lines and skin texture: retinol, retinal, adenosine and peptides are often found in a serum for fine lines. Introduce retinol and retinal gradually.
  • Complexion and pigmentation: niacinamide, vitamin C, tranexamic acid and alpha-arbutin are commonly used ingredients in a serum for pigmentation. During the day, pair it with sunscreen.
  • Skin that feels less firm: a peptide serum or collagen serum may contain ingredients such as palmitoyl peptides, copper peptides or collagen. Focus on what’s actually listed in the ingredients; a cosmetic ingredient doesn’t guarantee structural changes to the skin.

2. Consider when to use it and how to build it into your routine

A retinol serum or retinal product is usually intended for evening use. According to its product description, celimax The Vita-A Retinal Shot contains 0.1% retinal and should initially be used every other evening. The packaging for the retinol version of celimax recommends starting with twice-weekly use.

Use a product with sun protection during the day when using retinoids. Don’t introduce several new active ingredients at once.

3. Check the size, packaging and shelf life

Sizes vary widely, from 15 ml for a concentrated product to 150 ml for a booster. A larger bottle isn’t automatically better value if you hardly use the product or the formula oxidises quickly.

Check:

  • the ingredients list on the packaging;
  • the use-by date and period after opening;
  • whether the bottle seals properly;
  • warnings about the eyes, sunlight and irritated skin;
  • the texture: gel, lotion, oily or capsule.

Capsule packaging, as used for Roc Retinol Correxion Night Serum, can be handy for providing a set dose each time. However, it gives you less flexibility to adjust the amount.

Product choices for different user profiles

Suitable for: Budget-conscious beginners
Beauty of Joseon Revive Serum Ginseng Snail Mucin 30 ml

Beauty of Joseon Revive Serum: Ginseng+Snail Mucin 30 ml

Why it suits this profile: The gel texture and pump bottle make this Korean face serum easy to dispense as part of a simple skincare routine. According to the product specifications, it’s intended for dry, normal and combination skin.

How this product avoids the pitfall

The ingredients list and usage instructions are clearly stated. You don’t need to combine several potent active ingredients to start hydrating your skin.

Key benefit & highlights

30 ml, with glycerin, niacinamide, sodium hyaluronate and ginseng root water according to the listed ingredients.

Suitable for: Shoppers looking for premium quality
Medicube Triple Collagen Serum 4.0 55 ml

Medicube Triple Collagen Serum 4.0 55 ml

Why it suits this profile: If you’re looking for a larger bottle and a light, nourishing texture, this formula contains several forms of collagen and hyaluronic acid. The product description also mentions niacinamide.

How this product avoids the pitfall

The choice is based on verifiable details such as the 55 ml size and listed ingredients. However, bear in mind that the formula contains alcohol denat. and fragrance.

Key benefit & highlights

55 ml, with hydrolyzed, soluble and atelocollagen, plus various forms of hyaluronic acid according to the product information.

Suitable for: Targeted use & experienced users
celimax The VITA-A Retinal Shot Tightening Booster 15 ml

celimax The VITA-A Retinal Shot Tightening Booster 15 ml

Why it suits this profile: This product is aimed at users who want to add retinal to their evening routine to target skin texture, fine lines and visible pores.

How this product avoids the pitfall

The label gives a clear plan for building up use: every other evening for the first two weeks. So there’s no need to start with daily use.

Key benefit & highlights

15 ml, 0.1% pure retinal and 3% Matrixyl 3000 according to the product description; intended for evening use.

Suitable for: Targeted care for an uneven complexion
Anua Niacinamide 10% TXA 4% Serum 30 ml

Anua Niacinamide 10% + TXA 4% Serum 30 ml

Why it suits this profile: This serum is intended for anyone specifically looking for niacinamide and tranexamic acid to address an uneven complexion or visible dark spots.

How this product avoids the pitfall

The concentrations of niacinamide and TXA are stated. According to the product specifications, the formula is free from alcohol, oil and fragrance, but a patch test is still a good idea.

Key benefit & highlights

30 ml, with 10% niacinamide, 4% tranexamic acid, alpha-arbutin and several forms of hyaluronic acid according to the ingredients list.

Looking for more options?

We’ve put together a complete, up-to-date list of products that meet these strict selection criteria and comply with the applicable European safety regulations.

How to use a face serum in your routine

  1. Cleanse your face and apply toner if you wish.
  2. Use a few drops or the amount stated on the label.
  3. Gently apply the serum without rubbing hard.
  4. Finish with a moisturiser.
  5. Use sunscreen during the day, especially when using retinol, retinal or an exfoliating formula.

A hydrating serum can often be used in the morning and evening. It’s best to introduce a retinol serum gradually. A vitamin C serum is often used in the morning, but always follow the specific instructions on the packaging.

Frequently asked questions about face serums

When should you apply a face serum?

Apply a serum after cleansing and toning if you use a toner, but before your moisturiser. Its light texture is usually designed to be used as an intermediate step. If you use several serums, apply the thinnest formula first, but limit the number of active ingredients if you have sensitive skin.

How long does a serum last once opened?

It varies by product. Check the period after opening, use-by date and packaging. Store the serum in a cool, dry place away from direct sunlight, and close the bottle securely after use. Products containing vitamin C, retinol or retinal need extra protection from light and air.

Do you need an expensive anti-ageing serum?

No. Start by looking at the ingredients, concentration, size and directions for use. An affordable serum with glycerin, niacinamide or hyaluronic acid may suit your routine better than an expensive product with lots of marketing claims. Above all, choose a formula you can use consistently and as directed on the label.