10 Best 100ml Serums Of 2026
100ml Serums — Reviews, Recommendations & Updated Buying Guide September 2026
L’Oréal Paris Extraordinary Oil Beautifying Hair Oil Serum
Why We Love It
![SKIN1004 [Hudson's Pick] Madagascar Centella Ampoule](https://m.media-amazon.com/images/I/61iZUHSBgaL._AC_UL320_.jpg)
SKIN1004 [Hudson's Pick] Madagascar Centella Ampoule
Why We Love It
SKIN1004 Madagascar Centella Poremizing Fresh Ampoule 100ml
Why We Love It
SKIN1004 Madagascar Centella Tone Brightening Capsule
Why We Love It
L'Oreal Paris Elvive Extraordinary Hair Oil Serum
Why We Love It
Livon Hair Serum for Men & Women | Frizz-free
Why We Love It
L’Oréal Paris Elvive Dream Long Straight Frizz Killer Hair
Why We Love It
D'Alba Italian White Truffle First Spray Serum
Why We Love It
Matrix Opti Care Smooth Straight Split End Serum
Why We Love It
Skin Doctor Keratin Hair Serum
Why We Love It
Quick Pick
10 Best 100ml Serums Of 2026
Quick Pick
L’Oréal Paris Extraordinary Oil Beautifying Hair Oil Serum Multi-Usage Dried Out Hair 100ml
SKIN1004 [Hudson's Pick] Madagascar Centella Ampoule, Korean Face Serum with Centella Asiatica for Hydrating & Moisturizing, Soothing Facial Serum for Skin Balance, Korean Skin Care, 100ml
SKIN1004 Madagascar Centella Poremizing Fresh Ampoule 100ml
SKIN1004 Madagascar Centella Tone Brightening Capsule Ampoule 100ml, 3.38 fl.oz
L'Oreal Paris Elvive Extraordinary Hair Oil Serum, All Hair Types, 100ml
Livon Hair Serum for Men & Women | Frizz-free, stronger and shinier hair | For All Hair Types | Lightweight & Non Greasy | Enriched with Argan Oil & Vitamin E | 3.3 Fl.Oz
L’Oréal Paris Elvive Dream Long Straight Frizz Killer Hair Oil Serum 100ml
d'Alba Italian White Truffle First Spray Serum, Vegan Skin Care, Hydrating Face Moisturizer, Glow Serum for Radiant Skin, Non Comedogenic, All In One Mist, Korean skincare (100ml)
Matrix Opti Care Smooth Straight Split End Serum, 100ml
Skin Doctor Keratin Hair Serum, 100 ml
Buying Guide: 100ml Serums
📋 Table of Contents
1What concentration of active ingredients should I look for in a 100ml serum?
Aim for serums with 10-30% active ingredients like hyaluronic acid, vitamin C, or retinol. Lower concentrations may not deliver visible results, while higher ones can risk irritation, especially for sensitive skin.
2Is a 100ml size suitable for daily use?
Yes, 100ml is ideal for daily use, offering 1-2 months of regular application. It’s large enough to avoid frequent repurchasing but small enough to prevent waste if you don’t use it quickly.
3What type of packaging is best for preserving serum potency?
Dark glass or airless pump bottles protect serums from light and oxidation, which can degrade active ingredients. Avoid clear plastic bottles, as they may accelerate spoilage and reduce effectiveness.
4Should I choose a serum with oil-based or water-based formula?
Oil-based serums are better for dry or mature skin, offering deeper hydration, while water-based formulas are lighter and ideal for oily or acne-prone skin. Match the formula to your skin type for best results.
5Are there any common mistakes to avoid when using a 100ml serum?
Don’t apply too much — a few drops are enough. Also, avoid using it on damp skin, as this can dilute the product and reduce absorption. Always follow with a moisturizer to lock in the serum’s benefits.
How we choose
Our editors are people who genuinely love testing and writing about products. We compare each product's real-world usability and strengths, then distill what matters most into our own "Why We Love It" points — so you get an honest, at-a-glance sense of what counts before you buy.