护肤品
化学成分
KIEHL'S
科颜氏
契尔氏
基本信息
品牌:KIEHL'S “科颜氏”“契尔氏”
产品名:Powerful-Strength Line-Reducing Concentrate 祛皱紧肤精华液
功效:Decrease Appearance of Fine Lines and Wrinkles, and Improve Radiance and Texture 减少细纹和皱纹,改善肌肤光泽和质地
重点成分:12.5% VITAMIN C 维他命C + Hyaluronic Acid 玻尿酸
成分解析
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Propylene Glycol
中文名:丙二醇
作用:皮肤调理剂 - 保湿
降粘剂
溶剂
香料
特性:- enhance the appearance of skin by reducing flaking and restoring suppleness 通过减少角质剥落和恢复皮肤柔软来提高皮肤外观
- penetration enhancer 有渗透促进作用
警告:
- Classified as skin irritant.(皮肤刺激物)-- National Library of Medicine
It has been associated with irritant and allergic contact dermatitis as well as contact urticaria in humans.(有限的证据显示该成分与刺激性/过敏性接触皮炎、接触性荨麻疹有关)-- CIR (Cosmetic Ingredient Review)
Patients with eczema should use products containing Propylene Glycol with caution.(湿疹患者慎用) - Subject to concentration or use limitations(有浓度和使用限制) --Cosmetic Ingredient Review Assessments
- It should not be applied to damaged or burned skin. (破损皮肤禁用)
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Dimethicone
中文名:聚二甲基硅氧烷
作用:皮肤调理剂 - 保湿
皮肤保护剂 - 闭塞特性可防水
降粘剂
溶剂
特性:- prevents water loss by forming a hydrating barrier on the skin 通过在皮肤上形成保湿屏障来防止水分流失
- creating a subtle gloss that feels smooth and silky to touch 当应用于皮肤时,产生微妙的光泽,感觉光滑柔滑。
can fill in fine lines/wrinkles on the face, giving it a temporary “plump” look 可以在脸上填充细纹/皱纹,使其具有暂时的“丰满”外观 - As a non-comedogenic ingredient, it provides a significant amount of emollience and coverage to the skin, without adding any heaviness 作为非粉刺成分,它为皮肤提供了大量的润肤和覆盖,而不会增加任何沉重感
- enhance the light refractability of other ingredients 可以提高其他成分的光折射性
- has a unique fluidity that makes it easily spreadable 拥有独特流动性,易于涂抹
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Glycerin
中文名:丙三醇(甘油)
作用:皮肤调理剂 - 保湿
皮肤保护剂 - 闭塞特性可防水
特性:- attracts water to skin and helps skin to feel smoother and softer 吸收水分至肌肤,帮助肌肤恢复正常水合,变得更加光滑而柔软
- helps skin cells mature properly that spit out lipids to help form the skin's protective barrier 促进细胞成熟,从而分泌脂质保护肌肤
警告:
- Restricted in cosmetics (化妆品中限制使用)-- Canada - Prohibited and Restricted Cosmetics Ingredients
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Ascorbic Acid
中文名:抗坏血酸(维生素C)
作用:抗氧化剂
PH调节剂
特性:- essential nutrient required for collagen production, tissue repair, and for the synthesis of neurotransmitters 是胶原蛋白生成、组织修复和神经递质合成所必需的必需营养素
- slow deterioration caused by exposure to the air 减缓由暴露于空气引起的变质
维生素C是该产品的重点成分。这里针对维生素C的特性做了扩展调研。通过一篇发布于17年医学卫生期刊的论文,提取了以下信息点:The Roles of Vitamin C in skin health (该文章收录于美国国家医学图书馆)
Vitamin C, as a water-soluble and charged molecule, is repelled by the physical barrier of the terminally differentiated epidermal cells. 维生素C是水溶性的带电分子,被表皮细胞分化形成的物理屏障所排斥
. It is only when pH levels are below 4 and vitamin C is present as ascorbic acid that some penetration occurs. 只有当酸碱度低于4,且维生素C作为抗坏血酸存在时,才会在表皮发生一些渗透
Dietary supplementation is therefore only expected to be effective in elevating skin vitamin C in individuals who have below-saturation plasma levels prior to intervention. 有研究显示,通过饮食补给维生素C的方式,仅对血浆浓度低于饱和的个体有效。
文章也对维生素C的主要功能做了介绍:The promotion of collagen formation 促进胶原蛋白合成
is a potent antioxidant that can neutralise and remove oxidants, such as those found in environmental pollutants and after exposure to ultraviolet radiation. 是一种强效的抗氧化剂,可以中和环境污染物和紫外线辐射带来的氧化作用
Inhibition of melanogenesis 抑制黑色素生成
Play a role in the differentiation of keratinocytes在角质细胞的分化中发挥作用(促进伤口愈合)
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Ethylhexyl Palmitate
中文名:棕榈酸乙基己酯
作用:皮肤调理剂 - 润滑
溶剂
特性:- has a 'dry-slip' feel that is very similar to silicone's texture 拥有与硅相似的干滑感
警告:
- subject to concentration or use limitations(有浓度和使用限制)-- Cosmetic Ingredient Review Assessments
- Human irritant - strong evidence(已证实对人体有刺激性)-- Cosmetic Ingredient Review Assessments
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Cetyl PEG/PPG-10/1 Dimethicone
中文名:鲸蜡基二甲基硅氧烷共聚醇
作用:表面活性剂 - 乳化
皮肤调理剂 - 润滑
特性:- keeps the water and oil parts of an emulsion from separating 防止乳液水油分离
- gives a smooth and soft look and eliminates any tackiness 使皮肤光滑柔软,减少粘性
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Dimethicone Crosspolymer
中文名:聚二甲基硅氧烷交联聚合物
作用:增粘剂
乳液稳定剂
特性:- would not penetrate the skin 不会渗透进皮肤
- not soluble in water 不溶于水
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Ascorbyl Glucoside
中文名:抗坏血酸葡糖苷
作用:抗氧化剂
在上文介绍维生素C的期刊文章中有提到:- 抗坏血酸糖苷作为一种衍生物,比抗坏血酸更为稳定,能穿越皮肤表面物理屏障,深入渗透。在体内转化为抗坏血酸从而产生作用
- 但是这种衍生物在体内的转化效率目前不清楚
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Cyclohexasiloxane
中文名:环己硅氧烷
作用:皮肤调理剂 - 润滑
溶剂
特性:- has a unique fluidity that makes it easily spreadable 拥有独特流动性使得易于涂抹
- gives a silky & slippery feeling to the touch 给肌肤带来丝滑触感
- acts a mild water repellent by forming a protective barrier on the skin 在皮肤表面形成拒水屏障
- fill in fine lines/wrinkles, giving the face a temporary “plump” look 填充细纹和皱纹,使皮肤获得暂时的“丰满”效果
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Hydroxyethylpiperazine Ethane Sulfonic Acid
中文名:羟乙基哌嗪乙烷磺酸
作用:缓冲剂
特性:- maintains physiological pH 维持ph在恒定范围
警告:
- the production of hydrogen peroxide when exposed to ambient light. It is therefore strongly advised to keep HEPES-containing solutions in darkness as much as possible (当暴露于光照时会产生过氧化氢。强烈建议存储在黑暗条件下)
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Lauroyl Lysine
中文名:月桂酰赖氨酸
作用:表面活性剂 - 质地增强
皮肤调理剂 - 润滑
特性:- contributing to a product’s texture 改善产品质地
警告:
- subject to concentration or use limitations(有浓度和使用限制) --Cosmetic Ingredient Review Assessments
Acrylonitrile/Methyl Methacrylate/Vinylidene Chloride Copolymer
中文名:丙烯腈/甲基丙烯酸甲酯/亚乙烯基二氯共聚物
作用:成膜剂
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Polysilicone-11
中文名:聚硅氧烷-11
作用:表面活性剂 - 质地增强
皮肤调理剂 - 润滑
特性:- The film left behind has water-binding properties and leaves a smooth feel on skin 留下的薄膜具有水粘合特性,在皮肤上留下光滑的感觉
Adenosine
中文名:腺苷
作用:皮肤调理剂
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Hydrolyzed Hyaluronic Acid
中文名:水解透明质酸
作用:皮肤调理剂 - 保湿
特性:- a low molecular weight version of Hyaluronic Acid, and works mainly in the epidermis (outer layer of the skin)是天然大分子保湿剂透明质酸(玻尿酸)的低分子量版本,可深入皮肤表皮内
- acts as a sponge helping the skin to retain water, making it plump and elastic 起到海绵的作用,帮助皮肤保持水分,使其丰满和富有弹性
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Limonene
中文名:柠檬烯
作用:香精
特性:- has a light, fresh, and sweet citrus odor 具有淡雅,清新,甜美的柑橘气味
警告:
- Upon storage and exposure to sunlight and air, limonene degrades to various oxidation products which act as skin and respiratory irritants and sensitizers (暴露于阳光和空气中时,会降解成各种氧化产物,这些产物对皮肤和呼吸道有刺激和致敏作用)
- Recommended restricted in cosmetics: safe only if satisfies manufacturing specifications or purity limits(建议限制在化妆品中 - 使用,浓缩或制造限制 - 香味受限制:只有满足制造规格或纯度限制才能安全)--International Fragrance Association Codes & Standards
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Isobutane
中文名:异丁烷
作用:推进剂
警告:- subject to concentration or use limitations(有浓度和使用限制) --Cosmetic Ingredient Review Assessments
only for products for use around the eyes, on the skin, or may be aerosolized(仅适用于眼睛周围,皮肤上或雾化产品) --Cosmetic Ingredient Review Assessments - Human irritant - strong evidence (有强力证据显示为人体刺激物) --Cosmetic Ingredient Review Assessments
the substance is volatilized before it can come in contact with the skin, such a short period of contact makes the absence of sensitization, phototoxicity, and photosensitization studies unimportant(具有挥发性,如此短的接触时间使得基本没有致敏可能)
- subject to concentration or use limitations(有浓度和使用限制) --Cosmetic Ingredient Review Assessments
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Citrus Aurantium Dulcis (Orange) Peel Oil
中文名:甜橙果皮油
作用:皮肤调理剂
警告:- safe only within recommended use or concentration limits(在满足使用和浓度限制下是安全的)--International Fragrance Association Codes & Standards
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Citrus Limon Peel Oil/Lemon Peel Oil
中文名:柠檬果皮油
作用:香精
警告:- restricts the use, because it contains some compounds that may cause skin effects when exposed to the sun(使用是有限制,因为该成分含有一些化合物,当暴露在阳光下时可能会引起皮肤效应)*--International Fragrance Association Standard
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Citral
中文名:柠檬醛
作用:香精
警告:- safe only within recommended use or concentration limits(在满足使用和浓度限制下是安全的)--International Fragrance Association Codes & Standards
- Irritation (skin, eyes, or lungs) --European Union - Classification & Labelling
Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate
中文名:季戊四醇四(双-t-丁基羟基氢化肉桂酸)酯
作用:抗结块剂
以上基本介绍及成分列表来自于包装盒打印信息
成分解析来自于搜索引擎排名前十的信息网站,包括: EWG' Skin Deep - Cosmetics Database、Cosmetics Info、Truth in Aging、Wikipedia
通过此次调研,不难发现:
- 很多成分带来的“柔润”只是暂时的,或者说是修饰性的,如果中断产品使用/洗脸,都会失去效果;
- 水解透明质酸性质上和玻尿酸还是有一定区别,品牌方可能是考虑到后者在女性人群中的认知度,产品包装上有意识地隐去了这部分区别;
- 暗光储存是保持效用的重要条件;
- 抗氧化和保湿是各类护肤品的功效本质;其他都是虚的,哈哈哈