神经酰胺 NP × 保湿

天然油来源的植物鞘氨醇（含CER NP类似物）显著改善皮肤屏障修复和水合作用，优于C18-CER NP。

Phytosphingosine from natural oils (containing CER NP analogs) significantly improves skin barrier repair and hydration, superior to C18-CER NP.

含CER NP的润肤剂显著提高皮肤水合作用，且效果优于对照，直接支持保湿功效。

The emollient containing CER NP significantly improves skin hydration, and the effect is superior to the control, directly supporting moisturizing efficacy.

番茄籽皂苷（含lycoperoside H）通过上调CER合成酶增加CER NP含量，改善表皮水合，直接支持保湿功效。

Tomato seed saponin (containing lycoperoside H) increases CER NP content by upregulating CER synthase, improving epidermal hydration, directly supporting moisturizing efficacy.

显示CER NP与甘油三酯及皮肤健康状态相关，但未直接测试CER NP的保湿功效，为相关性分析。

Shows correlation of CER NP with triglycerides and skin health status, but does not directly test moisturizing efficacy of CER NP; it is a correlation analysis.

综述指出CER NP与皮肤干燥的关联不一致，证据异质性高，不支持明确结论。

The review points out that the association between CER NP and dry skin is inconsistent, with high heterogeneity of evidence, not supporting a clear conclusion.

研究显示CER NP/NS比值与皮肤屏障功能（TEWL、电容）相关，但未直接测试CER NP的保湿功效，且为相关性分析，非干预性试验。

The study shows that the CER NP/NS ratio is associated with skin barrier function (TEWL, capacitance), but does not directly test the moisturizing efficacy of CER NP, and it is a correlation analysis, not an interventional trial.

研究CER NP在脂质模型中的结构，未涉及保湿功效。

The study investigates the structure of CER NP in lipid models, without involving moisturizing efficacy.

仅通过模拟研究CER NP的分子结构，未涉及保湿功效的生物学验证。

Only simulates the molecular structure of CER NP, without biological validation of moisturizing efficacy.