Sun Protection
Is blue light (HEV) harmful to the skin? What is known about visible light
What blue light (HEV) is, what visible light from the sun does to the skin and what is known about screen light, plus what…
Guide · 80 articles
Skincare Guide
Referenced articles on skin types, ingredients and routine order. Product information comes from the s'hevec product data library.
Featured
Skincare routine order: the right morning and evening sequence, step by step
The right order for morning and evening skincare steps, which serum goes first when you use two, and tables showing where s'hevec products fit into morning, evening and acid-evening routines.
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Routines
What is PAO? How long can you use a cosmetic product after opening?
What does 12M next to the open-jar symbol mean, and how does it differ from the expiry date? Signs that an opened cosmetic has…
Skincare
How to read an INCI list: understanding cosmetic labels
An INCI list shows ingredients under international names and in descending order of quantity. A step-by-step reading of the Love In Blue This Time…
Exfoliation
What is skin pH? Why pH matters in acid products
Why the skin's surface is acidic, how soap and cleansing change its pH and why pH matters as much as concentration in acid toners,…
Exfoliation
What does the active percentage mean? Is a higher percentage better?
What does the percentage on the label show, and what does it not? How percentage relates to pH, group totals and raw-material solution wording…
Skincare
What are vegan cosmetics? How they differ from cruelty-free
Vegan describes where the ingredients come from; cruelty-free describes the testing process. A decision table for the two labels, the EU ban on animal…
Vitamin C
Can you use niacinamide and vitamin C together?
In what order to apply niacinamide and a vitamin C derivative on the same morning, when a single serum is enough and which product…
Fine Lines
A skincare routine for the look of fine lines and wrinkles
A morning and evening routine for the look of fine lines: why sun protection comes first, the order of a vitamin C derivative, ceramide…
Exfoliation
Using active ingredients together: which ones belong in the same routine?
Which active ingredients can share a routine, and which should be split across different evenings? A general pairing table, how s'hevec products pair with…
Exfoliation
What causes dull skin? Skincare steps for a more radiant look
The three causes of dullness, the sign each one shows on the skin and the matching care step, with a weekly radiance plan that…
Sensitive Skin
What is bisabolol? The molecule isolated from chamomile
What is bisabolol, how does it differ from chamomile extract and can it cause allergies? The limits of the evidence, allergy reports and which…
Hydration & Barrier
Skincare during the change of season: how to update your routine
In autumn and spring, the routine is not rebuilt from scratch: one step is changed a week, hydration first, then the acid steps. A…