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$ 238.00
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Packing Spec250毫升
Country of Origin United States of America
Description

Our products are produced by FDA registered laboratory and under the standard of ISO 22716(GMPC) to guarantee our best product quality.

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Description
MD Skinical的爽膚水性質是溫和,能改善表皮屏障功能,減少皮膚暗沉及細紋,並有利對抗暗瘡。維他命B3是有助於促進皮膚的健康,無論乾性、油性及敏感肌都可以使用。

維他命B3的功效:
1. 抗老化
維生素B3是NAD與NADP的重要成分,經還原反應後可形成NAD(P)H,是細胞進行氧化還原反應過程的重要輔酶,這些輔助因子的還原態為強效抗氧化劑,極可能具備氧化還原的調控機制(redox regulation mechanism),可影響許多組織的功能,有些臨床研究發現長期塗抹菸鹼胺,可改善皮膚的老化現象。

2. 淡化黑斑
長期塗抹菸鹼胺可減少皮膚的色素沉著斑點,因為菸鹼胺會抑制黑色素細胞(melanocytes)將黑色素小體(melanosome)轉移到角質形成細胞(keratinocytes),使得黑色素細胞停止生產黑色素(melanin),但此作用為可逆變化,當停止使用菸鹼胺後,皮膚將恢復黑色素的製造能力。

3. 改善膚色蠟黃(sallowness)
皮膚臘黃除了與過量攝取胡蘿蔔素的食物有關,皮膚內部的生化反應也可能造成皮膚蠟黃的外觀。菸鹼胺具有抗醣基化(antiglycation)性質,塗抹菸鹼胺可明顯改善膚色蠟黃現象,在皮膚生理上的可能機制,與NAD(P)H 抗氧化活性有關。它可阻止蛋白醣基化(protein glycation)的Maillard氏反應(Maillard reaction),阻止一種稱為Amadori產物(Amadori products)的交聯黃棕色蛋白在皮膚的堆積。

4. 抑制出油,改善毛孔粗大
長期塗抹菸鹼胺,可減少皮脂腺分泌,改善毛孔粗大的現象,使膚質較為平滑。

5. 減少皺紋
當皮膚的真皮層膠原蛋白流失,同時淺層真皮層累積過量的糖胺聚醣(glycosaminoglycan, GAG)時,皮膚將出現皺紋。菸鹼胺可促進真皮產生膠原蛋白,並抑制淺層真皮層製造過多的糖胺聚醣,故可減少皺紋的形成。

6. 改善皮膚屏障功能,降低刺激反應
菸鹼胺會促進皮膚屏障層脂質與蛋白質的合成,例如神經醯胺(Ceramides)與角蛋白(keratin)、包被蛋白(involucrin)、絲聚合蛋白(filaggrin),故可改善皮膚屏障的能力。在皮膚塗抹菸鹼胺可改善皮膚屏障功能,減少經皮水分散失(transepidermal water loss, TEWL)程度,使得皮膚對刺激性物質具有更好的抵抗力,例如界面活性劑十二烷基硫酸鈉(sodium lauryl sulfate, SLS)和反式維生素A酸(trans-retinoic acid),因此外用菸鹼胺可減少某些物質的刺激性,並改善臉部的紅斑。

主要成分:
維他命B3(Niacinamide)、維他命B5(Panthenol)、甘油、甘草萃取物,醣基海藻糖

使用方法:
早晚於潔面後使用

適合皮膚:
適合任何肌膚使用

原產地:
美國
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