かずのすけ

@kazunosuke

658K subscribers 691 videos

こんにちは、かずのすけです。アメブロで化粧品や美容についてのブログを書いてます。『かずのすけの化粧品評論と美容化学についてのぼやき』 https://ameblo.jp/rik01194 美容や化粧品にまつわるあんな噂やこんな噂を化学的に検証・解説しています。化粧品の成分解析なども更新中。「美容化学者」の肩書で著書9冊目！累計10万部突破の『オトナ女子のための美肌図鑑』や、超ベテランコスメ開発者と共同執筆した『美肌成分事典』など、化粧品や美容についての化学的に正しい情報の発信を目指しています。普段は文章中心ですが、動画も頑張って更新したいと思います(^^) 皆さんのチャンネル登録待ってます！

かずのすけ Latest Uploads

【シミ・美白に効く】医薬品＆化粧品の組合せ！最新研究で判明したビタミンC内服×トラネキサム酸外用の効果が凄い…！プロも10年以上続けてきた肌を白く保つ方法。

かずのすけ 33.7K views 18 hours ago
Highlights (6)
The video explains recent research on combining oral ingredients such as vitamin C and L-cysteine with topical tranexamic acid skincare. In an extracted human-skin model, the combination appeared to suppress UVB-related reductions in skin brightness more than either approach alone, although the presenter points out that this was not a human clinical trial. Several tranexamic-acid lotions and oral vitamin C products are introduced, along with cautions about taking tranexamic acid orally.
- Explains research on oral ingredients combined with topical tranexamic acid
- Topical tranexamic acid showed strong protection against UV-related darkening in the model
- The experiment used extracted human skin rather than people
- The presenter discusses personal issues with L-cysteine and possible long-term risks
- Warns against taking oral tranexamic acid indiscriminately
Products

Ihada

Whitening Clear Lotion

3.6 (1)

Chifure

TA Brightening Toner

0 (0)
【新作ニュース大解禁】傑作ダーマエイドの最新リニューアル解説！３種有効成分の超話題作がグリセリン抜去＆におい改善で無双状態へ…。まさかの新作情報も！

かずのすけ 45.1K views 3 days ago
Highlights (7)
This video, made in partnership with PDC, explains the renewal of Derma Aid Triple Active Lotion and Cream. The lotion reduces glycerin-related ingredients and adjusts the ingredient identified as a source of odor, resulting in a lighter, less sticky feel. A new Derma Aid Mild series using a different three-active-ingredient combination is also planned for release within the year.
- The renewed lotion and cream launched on September 16
- The three active ingredients and five-free formula remain
- The lotion feels lighter with less stickiness
- The cream adds ceramides and has reduced odor
- A Derma Aid Mild series is planned for release this year
Products

Dermaaid

Triple Active Lotion

0 (0)
【最新型アゼライン酸セラム】同じ効果＆より低刺激に！！3％非中和型セラムと20％従来型クリームを比較した最新研究が衝撃的すぎた【DRX AZAクリアセラム】

かずのすけ 20.9K views 1 weeks ago
Highlights (7)
The video compares Rohto Pharmaceutical’s DRX AZ Clear Serum with the traditional AZ Clear cream, focusing on how neutralization affects azelaic acid. A study found that the 3% non-neutralized serum produced acne improvements comparable to the 20% dispersed cream, with less irritation early in use. However, the serum can still cause stinging and is not presented as universally ideal for highly sensitive skin.
- Comparable acne improvement between the 3% serum and 20% cream
- Less early stinging and irritation with the serum
- The serum showed roughly four times higher skin penetration efficiency
- The formula may still be irritating for very sensitive skin
- A future general-market version is considered possible
【石けんの隠れ特性】肌の細菌を選択殺菌！？『牛乳石鹸』が肌荒れに効く理由ついに判明か。話題のメーカー最新研究を洗浄科学のプロが解説！【赤箱＆青箱】

かずのすけ 36.4K views 1 weeks ago
Highlights (6)
The video examines a recent study from the maker of Milk Soap and explains how different soap ingredients may affect skin microbiota. The study suggests that certain fatty-acid sodium soaps and tallow-derived soap may reduce some bacteria more selectively, but it does not directly establish an acne benefit. The red and blue Cow Brand bars contain tallow-derived ingredients, yet they are not completely simple soaps and may be drying or irritating for sensitive or atopic skin.
- Soap’s antibacterial profile may vary by fatty-acid composition
- The findings are preliminary company research, not definitive evidence
- The red bar contains squalane and is described as more moisturizing than the blue bar
- Recommended more for oily or acne-prone skin, with caution for sensitive or atopic skin
- Simple additive-free soap is presented as an alternative to Cow Brand Milk Soap
Products

Shiseido

D Program Intense Enriching Serum

0 (0)
【本日発売】VCエチル*有効成分！攻めのビタミンC化粧水『セラシエルヴィタローション』グリセリン・オイル・香料・アルコール全フリーで完成！【9月末まで500円OFFクーポン配布中】

かずのすけ 29K views 2 weeks ago
Highlights (6)
The video introduces セラボ’s new セラシエルビタローション and the renewed セラシエルレッドモイストクリーム. The lotion uses VC Ethyl as its active ingredient and has a lightweight, watery texture without glycerin, oil, ethanol, or fragrance. The speaker recommends caution for sensitive skin that does not tolerate vitamin C and compares it with the gentler セラキュアホワイトローション.
- The lotion contains 150 ml and costs 3,400 yen
- VC Ethyl is presented as supporting brightening and skin-irritation prevention
- A watery, non-sticky formula free of glycerin, oil, ethanol, and fragrance
- The cream has been changed to an airless, light-blocking tube
- A 500-yen official-store coupon is available through the end of September
【さすがにコッチが神すぎた】キュレル新作『オイル美容液』、世界を視野に過酷乾燥ケアに特化！日本人向けには従来作がやはり最強…！【シミ・ソバカス予防ケア】

かずのすけ 13.7K views 2 weeks ago
Highlights (6)
The video reviews Curel’s new oil serum, developed with extremely dry European environments in mind. It contains Camellia ET, an anti-inflammatory active, squalane, and a ceramide-function capsule system, offering potential brightening, irritation-prevention, and barrier-support benefits. However, its oily finish and price make Curel’s existing emulsion and cream more practical for most Japanese users.
- Designed for severely dry, sensitive skin in harsh climates
- Contains Camellia ET and an anti-inflammatory active
- Squalane-based oil formula with a ceramide-function capsule system
- May feel heavy and glossy on the skin
- Existing Curel emulsion and cream are recommended for most Japanese users
Products

Curel

Brightening Moisture Facial Cream

3.6 (1)

Curel

Intensive Moisture Care Moisture Sealing Oil Serum

0 (0)

Curel

Intensive Moisture Care Deep Barrier Water Serum

0 (0)
【実質価値５万円超え】塗るだけで"疑似皮膚"形成『エストジェノリュクスクリーム』完全解説！花王２大ハイテク技術がW融合【皮脂RNA解析×ファインファイバー】

かずのすけ 11.4K views 3 weeks ago
Highlights (7)
Est Genolyx Cream combines skin RNA analysis research with Fine Fiber technology to form a pseudo-skin film on the surface of the skin. It uses cellulose-based microfibers and moisturizing ingredients, while its texture feels like a soft, ordinary cream rather than a visible peel-off film. The creator considers it expensive but relatively easy to use and potentially suitable for sensitive skin.
- Combines skin RNA research with Fine Fiber technology
- Cellulose microfibers help reduce moisture loss
- 50 g priced at ¥14,300 including tax
- Fragrance is compared to クレドポ and ルフォンドゥタン
- Expensive, but easier to use than the previous device system
【今まで黙ってたけど】化粧水、使うべきはこっちです！『オルビスユードット』vs『オルビスユー』正しい選び方を化粧品のプロが解説！

かずのすけ 36.7K views 3 weeks ago
Highlights (6)
The video compares Orbis U and Orbis U Dot Essence Lotion in terms of ingredients, texture, price, and suitable skin concerns. Orbis U focuses on skin-trouble care with dexpanthenol W and feels relatively lightweight. Orbis U Dot combines tranexamic acid with richer moisturization and is presented as a better choice for dryness, loss of firmness, and dark-spot care.
- Orbis U uses dexpanthenol W for skin-trouble care
- Orbis U Dot features tranexamic acid and high moisturization
- Orbis U feels lighter, while U Dot feels more hydrating
- The creator personally recommends U Dot for easily sensitized skin
- Both have simple, fragrance-free-style formulas
Products

Orbis

U Dot Essence Lotion

0 (0)

Orbis

The Cleansing Oil

3.7 (1)

Orbis

Wrinkle Bright UV Protector SPF 50+

0 (0)
【最近のネイル撮ってみた】自爪保護＆手荒れも防ぐセルフネイルを初公開！アセトン不使用ネイルオフ＆ギターでも割れないお勧めジェルを紹介します！

かずのすけ 13.9K views 4 weeks ago
Highlights (6)
The video introduces a clear gel manicure routine designed to protect the nails while minimizing hand irritation. The creator removes gel without acetone by filing it down with a nail machine and leaving a thin layer behind, then uses base, builder, and non-wipe top gels. He also explains how the routine helps prevent nails from breaking during guitar playing, along with important warnings about uncured gel and dust.
- Removes gel without acetone and leaves a thin layer to help protect the natural nail
- Uses Seed Resin base and top gels together with a ギャオ builder gel
- The builder gel is praised for making fragile nails much stronger
- Warns viewers to avoid skin contact with uncured gel and to control nail dust
【無印の今季新作】『発酵ふき取り化粧水』＆『薬用歯みがき』シリーズ解説！美白も知覚過敏も歯茎ケアも…全部盛りハミガキがガチ過ぎる。

かずのすけ 22.1K views 1 months ago
Highlights (7)
This video analyzes MUJI’s new fermented wiping lotion and medicated toothpaste products, focusing on their ingredients and user experience. The wiping lotion adds cleansing support compared with the fermented booster lotion, but its slight slip and possible irritation may concern some users. Among the toothpastes, the Total Care Gel is presented as the most impressive option because it combines fluoride, sensitivity, whitening, and gum-care functions.
- The fermented wiping lotion contains lactic acid and cleansing ingredients
- The fermented booster lotion may be gentler for sensitive skin
- The children’s toothpaste contains 950 ppm fluoride and no foaming or polishing agents
- The Total Care Gel contains 1,450 ppm fluoride and multiple oral-care actives
- A related clothing line was temporarily suspended because of an outer-box labeling error

かずのすけ

かずのすけ Latest Uploads

【シミ・美白に効く】医薬品＆化粧品の組合せ！最新研究で判明したビタミンC内服×トラネキサム酸外用の効果が凄い…！プロも10年以上続けてきた肌を白く保つ方法。

Highlights (6)

Video summary

Products

【新作ニュース大解禁】傑作ダーマエイドの最新リニューアル解説！３種有効成分の超話題作がグリセリン抜去＆におい改善で無双状態へ…。まさかの新作情報も！

Highlights (7)

Video summary

Products

【最新型アゼライン酸セラム】同じ効果＆より低刺激に！！3％非中和型セラムと20％従来型クリームを比較した最新研究が衝撃的すぎた【DRX AZAクリアセラム】

Highlights (7)

Video summary

【石けんの隠れ特性】肌の細菌を選択殺菌！？『牛乳石鹸』が肌荒れに効く理由ついに判明か。話題のメーカー最新研究を洗浄科学のプロが解説！【赤箱＆青箱】

Highlights (6)

Video summary

Products

【本日発売】VCエチル*有効成分！攻めのビタミンC化粧水『セラシエル ヴィタローション』グリセリン・オイル・香料・アルコール全フリーで完成！【9月末まで500円OFFクーポン配布中】

Highlights (6)

Video summary

【さすがにコッチが神すぎた】キュレル新作『オイル美容液』、世界を視野に過酷乾燥ケアに特化！日本人向けには従来作がやはり最強…！【シミ・ソバカス予防ケア】

Highlights (6)

Video summary

Products

【実質価値５万円超え】塗るだけで"疑似皮膚"形成『エスト ジェノリュクスクリーム』完全解説！花王２大ハイテク技術がW融合【皮脂RNA解析×ファインファイバー】

Highlights (7)

Video summary

【今まで黙ってたけど】化粧水、使うべきはこっちです！『オルビスユードット』vs『オルビスユー』正しい選び方を化粧品のプロが解説！

Highlights (6)

Video summary

Products

【最近のネイル撮ってみた】自爪保護＆手荒れも防ぐセルフネイルを初公開！アセトン不使用ネイルオフ＆ギターでも割れないお勧めジェルを紹介します！

Highlights (6)

Video summary

【無印の今季新作】『発酵ふき取り化粧水』＆『薬用歯みがき』シリーズ解説！美白も知覚過敏も歯茎ケアも…全部盛りハミガキがガチ過ぎる。

Highlights (7)

Video summary

かずのすけ Mentioned Products

【本日発売】VCエチル*有効成分！攻めのビタミンC化粧水『セラシエルヴィタローション』グリセリン・オイル・香料・アルコール全フリーで完成！【9月末まで500円OFFクーポン配布中】

【実質価値５万円超え】塗るだけで"疑似皮膚"形成『エストジェノリュクスクリーム』完全解説！花王２大ハイテク技術がW融合【皮脂RNA解析×ファインファイバー】