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…
Articles on this topic
29 articles · Page 1/3
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…
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…
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…
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…
Ingredient Glossary
What does liquorice root extract do for the skin? Sensitive skin, tone and the limits of the evidence
What liquorice root extract (Glycyrrhiza Glabra Root Extract) is and what it does and does not do for the skin: what the sources say…
Eye Area
What does baobab extract do in skincare?
What is baobab extract (Adansonia digitata), what does it contain and what do our sources say about its effect on the skin? How it…
Sensitive Skin
What is allantoin and what does it do? A soothing supporting ingredient
Allantoin is a supporting ingredient often used in soothing formulas: where the evidence remains limited, how it differs from panthenol and its place in…
Ingredient Glossary
What is saccharide isomerate (Pentavitin)? A sugar-derived humectant
Pentavitin (saccharide isomerate) is a humectant derived from sugar. How it differs from hyaluronic acid, whether it can be used instead of it, its…
Exfoliation
What is lactic acid and what does it do?
What lactic acid does, whether it hydrates the skin and how it differs from glycolic acid, with the role of pH and concentration, the…
Exfoliation
What is PHA? Gluconolactone and how it differs from AHAs
What are PHA and gluconolactone, and how do they differ from AHA and BHA? The place and limits of gluconolactone in the formulas of…