Guides & Resources

Guides for spa and skincare professionals

Buying guides, ingredient explainers, brand spotlights, and industry data, written to the same standards as our brand profiles: sourced, dated, and never for sale.

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New guides are added as the directory grows. Any piece that involves a brand relationship or sponsorship is labeled.

What is niacinamide? A guide for estheticians
Opening order minimums at professional skincare brands
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