The Cutib Blog

Skin science, written plainly

Our team writes about skin biology, AI research, ingredient formulation, and what personalization actually means in practice.

For Brands

Why Skincare Returns Hurt Small Beauty Brands Most

The economics of product returns hit indie and DTC brands disproportionately hard. The root cause is almost always the same: a recommendation mismatch that could have been prevented.

Donghyuk Choi
Product Thinking

The Case for Personalization Before Purchase

Most personalization in beauty happens after the sale: subscription boxes, loyalty tiers, post-purchase surveys. The bigger opportunity is at the point of decision, not after.

Donghyuk Choi
Skin Science

Matching Ingredients to Skin Texture, Not Skin Type

Texture is one of the most information-dense signals in a skin reading. It changes with hydration, barrier health, and active ingredient use in ways that skin type buckets cannot capture.

Soyeon Kwon
Engineering

How We Built the Cutib Skin Reading Pipeline

A look inside the architecture decisions we made when building a production computer vision pipeline for consumer-grade skin photography. What we got right and what we had to rebuild.

Soyeon Kwon
Skin Science

Dehydration vs. Oily Skin: Why the Difference Matters

Oily skin and dehydrated skin can look similar in a photo. They require opposite treatments. Understanding the difference is one of the most important things a skincare recommendation can get right.

Donghyuk Choi
Formulation

Fragrance Sensitivity: Invisible on Labels

Fragrance sensitivity shows up as redness, tingling, or a stinging sensation that many people attribute to the wrong ingredient. Understanding how fragrance compounds work in formulations helps identify the actual trigger.

Arjun Mehta
AI Research

Photo Quality and Skin Analysis Accuracy

How much does lighting actually affect AI skin reading results? We ran controlled tests across different photo conditions to understand which variables matter most.

Soyeon Kwon
Skin Science

What Skin Tone Does Not Tell Us About Skin Type

Skin tone and skin type are two separate dimensions. Recommendations built on one often mistakenly bundle the other. This conflation has real consequences for how people choose products.

Arjun Mehta
Product Thinking

Why Skincare Quizzes Fail to Personalize

Quiz-based personalization has a structural problem: it asks people to describe their own skin, and most people are not accurate observers of what is happening at the surface level.

Donghyuk Choi

Start Now

Read your skin, not about your skin

Take your first AI skin reading. Free to start, no card required.