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Round Lab

Round Lab Birch Juice Moisturizing Sun Stick

Ingredient analysis and how the ad lines read

Product photo of Round Lab Birch Juice Moisturizing Sun Stick

Read on 2026-09-09

What is this product?

Buy this one if dry or wind exposed skin is the problem and you want sun protection you can reapply without a mirror. It is a 19g dial up stick built on a wax and ester base, with birch sap declared at 1,045ppm plus glycerin, hyaluronic acid and a twelve peptide block, and three organic UV filters sitting high in the table. Skip it if you want a sunscreen that disappears: the same wax that makes it portable leaves a film, and it has no tint to even out tone. The protection grade printed in the product name is not stated anywhere on the brand's own stick page, which was checked directly; the regulated notice block on the retailer records declares a functional cosmetic filing but names no grade.

What makes it different?

A hydration led stick rather than a mattifying one: birch sap at a declared 1,045ppm and a twelve peptide block sit inside a wax base, and the whole ingredient record for it comes from the retailer notice block rather than from any brand published page.

What is in it?

The full ingredient list as the brand publishes it, in the printed order. Each name links to what we know about that ingredient.

This brand publishes its ingredient list in Korean only. Names below are the matching INCI names from the Korean Cosmetic Association ingredient dictionary.

Key ingredient

Ingredients with no mark are ones we found nothing notable about, and when marks overlap on one ingredient we show the caution first.

We could not place these in the list above: Oryza Sativa (Rice) Bran Oil, Synthetic Wax, Ozokerite, Coco-Caprylate/Caprate

Did the ad claims hold up?

We checked 3 lines this product advertises against the ingredient list and public documents. One of them looks likely, though none are proven outright.

Claims translated from Korean, originals preserved.

likely, not proven1

  • Passed the functional cosmetics review (or report) in accordance with the Cosmetics Act
    Korean original

    화장품법에 따른 기능성 화장품 심사(또는 보고)를 필함

partly backed1

  • Turn the dial at the bottom of the container to raise an appropriate amount of contents, then gently spread and apply. *Raise the contents by about 5mm before use. Due to the stick formulation, if raised excessively, the product may break or separate.
    Korean original

    용기 하단의 다이얼을 돌려 내용물을 적당량 올린 후, 가볍게 펴 발라줍니다. *내용물을 약 5mm 올려 사용하세요. 스틱 제형 특성상 과도하게 올릴 경우 제품이 부러지거나 분리될 수 있습니다.

no evidence1

  • All skin types
    Korean original

    모든 피부용

Each line is quoted as the brand published it, and each one was read on its own against the ingredient list and the documents the brand publishes.

How we read these lines

What else is worth seeing?

Products we read alongside this one.

Which articles cover it?

Articles on this site that write about this product.