Ceruse

Specimen no. 041 · Skin barrier

The barrier was never meant to let you in. And yet.

Serums promise delivery beneath the surface. Our next examination follows the evidence behind that promise — molecular weight, formulation, and the distance between what a bottle says and what a study can show.

By Fatima AparaIn examination

Inside the examination

We’re looking at how topical delivery is measured, which study designs can support a claim, and where the evidence stops. This is an editorial preview; the sourced article will follow after review.

Plate I · Digital illustration · CERUSE

Plate I — pathways of topical absorption.
Digital illustration. Schematic, not to scale.

Fig. I · Cross-section of skinNot to scale

The surface is only the beginning. A closer look at the architecture behind the promise.

Under examination

The full index

Botanicals · No. 040

Bakuchiol is not retinol. What do the trials say?

The comparison is everywhere. We’re looking at the trials behind it: who took part, what was measured, and what gets lost in the copy on the bottle.

Fatima Apara · Editorial preview

Two women in cream and oxblood at a café table

A moment between pages

039

Apothecary

The heavy metals in your lipstick, measured rather than implied

What a laboratory result can tell us — and why a trace is not the same thing as a dose.

In examination

038

Photobiology

SPF is a laboratory number wearing a marketing coat

An examination of test conditions, everyday application, and the space between them.

In examination

037

Formulation

Who funded the collagen drink trials

Following the funding, the methods, and the questions a paper leaves unanswered.

In examination

A visual interlude

There’s more to the picture.

Explore the colors, rituals, and everyday scenes behind the journal.