shaishaishai Caffeine Shot Vita C Bubble Serum

What is this product?

shaishaishai prints its amounts, and the amounts put the case for this serum on the caffeine rather than on the vitamin C: caffeine is disclosed at 18,000 ppm, which is 1.8 percent and a genuinely functional dose, while the ascorbic acid the name leads with is disclosed at 10 ppm, or 0.001 percent, printed last of just 19 ingredients. The base is not water but sea buckthorn water at 744,876 ppm, and niacinamide sits third.

What makes it different?

Nineteen ingredients with no 정제수 entry at all is the structural oddity here: the token 정제수 returns zero and sea buckthorn water takes the base position outright at 744,876 ppm, where a serum normally opens on purified water. Three disclosed concentrations on a list this short account for about 76 percent of the formula by declared weight, so most of what is in it is a number rather than a name. The tokens 오일, 버터 and 에스터 return zero, so no oil, butter or fatty ester is printed. It is fragranced, with 향료 thirteenth of 19. The brand's own storefront entry for this SKU sells it on tone and pigmentation: 칙칙한 안색·색소침착 한 번에 케어!

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 ingredientWorth a closer look

• Hippophae Rhamnoides Water
• Propanediol
• Niacinamide
• Glycerin
• Butylene Glycol
• 1,2-Hexanediol
• Glycereth-26
• Caffeine
• C12-14 Alketh-12
• Ethylhexylglycerin
• Gardenia Florida Fruit Extract
• Xanthan Gum
• Fragrance
• Adenosine
• Disodium EDTA
• Dextrin
• Kojic Acid
• Glutathione
• Ascorbic Acid

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: C12-14 Aleth-12

Did the ad claims hold up?

We checked 4 lines this product advertises against the ingredient list and public documents. One of them holds up. The rest are only partly right or have nothing behind them.

Claims translated from Korean, originals preserved.

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