10 Best 100ml Serums Of 2026
100ml Serums — Reviews, Recommendations & Updated Buying Guide September 2026


L’Oréal Paris Extraordinary Oil
おすすめの理由
![SKIN1004 [Hudson's Pick]](https://m.media-amazon.com/images/I/61iZUHSBgaL._AC_UL320_.jpg)
SKIN1004 [Hudson's Pick]
おすすめの理由

SKIN1004 Madagascar Centella
おすすめの理由

SKIN1004 トーンブライトニング カプセルアンプル 100ml
おすすめの理由

L'Oreal Paris Elvive Extraordinary
おすすめの理由

Livon Hair Serum for Men & Women
おすすめの理由

L’Oréal Paris Elvive Dream Long
おすすめの理由
![[d'Alba公式] ホワイトトリュフ ファースト スプレーセラム](https://m.media-amazon.com/images/I/51Hyi1zkxYL._AC_UL320_.jpg)
[d'Alba公式] ホワイトトリュフ ファースト スプレーセラム
おすすめの理由

Matrix Opti Care Smooth Straight
おすすめの理由

Skin Doctor Keratin Hair Serum
おすすめの理由
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10 Best 100ml Serums Of 2026
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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](https://m.media-amazon.com/images/I/61iZUHSBgaL._AC_UL320_.jpg)
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 トーンブライトニング カプセルアンプル 100ml / Tone-Brightening Capsule Ampoule 100ml / 美白ケア 美容液

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公式] ホワイトトリュフ ファースト スプレーセラム 100ml White Truffle First Spray Serum](https://m.media-amazon.com/images/I/51Hyi1zkxYL._AC_UL320_.jpg)
[d'Alba公式] ホワイトトリュフ ファースト スプレーセラム 100ml White Truffle First Spray Serum

Matrix Opti Care Smooth Straight Split End Serum, 100ml

Skin Doctor Keratin Hair Serum, 100 ml
購入ガイド: 100ml Serums
📋 目次
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.
選び方について
編集者は製品を試し、それについて書くことを心から愛するメンバーです。各製品の実際の使いやすさと強みを比較し、最も重要な点を独自の「おすすめの理由」にまとめています。購入前に、大切なポイントがひと目でわかります。