Glycerin in moisturisers: hydration, concentration and feel
Glycerin’s hydration results depend on the formula and test. Look at concentration, water loss, and after-feel when comparing moisturisers.
3 min read
Ingredients
What niacinamide studies tell formulators
The familiar 5% study, oil measurements, and barrier research answer different questions. Use those differences to plan the next formula comparison.
3 min read
Choosing a PDRN ingredient for skincare
Two PDRN ingredients added at the same rate may deliver very different amounts. Start with composition, then examine the studies and proposed claim.
3 min read
A supplier changed an ingredient specification. What happens next?
A revised limit, test method, and material composition are different changes. Establish which occurred before accepting the next delivery.
3 min read
OPSS ingredient-safety data request: the June deadline has passed
OPSS sought data on seven listed ingredients. The extended deadline has passed, and the request itself is not a new ingredient ban.
1 min read
What you can learn from an ingredient list
Ingredient names and their order tell you something about a cosmetic. They do not reveal exact percentages or prove its performance.
2 min read
How to turn an ingredient pitch into a trial
Start with a problem in the product, identify the commercial material, and design a comparison that can answer the question.
2 min read