Klairs Fundamental Watery Oil Drop
77AI Score
Clinical evidence100
AI Score blends Effectiveness (40%), Skin compatibility (25%), Texture (20%) and Longevity (15%). Final rank also weighs real reviews and clinical evidence.
Water-based serum with green tea, ferments, and peptides offers oil-like benefits without greasiness.
Key actives
Peptidespeptide
Signals firmness and repair
agingfirmness
Green Tea / Matchabotanical
Antioxidant, calming
oilinessaging
Collagenprotein
Supports plumpness and elasticity
agingfirmness
Ceramideslipid
Restores the skin barrier
barrierdrynesssensitivity
Rice Waterbotanical
Traditional glow and hair strength
dullnesshairfall
Hyaluronic Acidhumectant
Deep, plumping hydration
drynessdehydration
Screened by real sources
182 references across this formula's activesThe Effects of Dietary Supplementation with Collagen and Vitamin C and Their Combination with Hyaluronic Acid on Skin Density, Texture and Other Parameters: A Randomised, Double-Blind, Placebo-Controlled Trial.The Effect of Local Hyaluronic Acid Injection on Skin Aging: A Systematic Review and Meta-Analysis.Human skin penetration of hyaluronic acid of different molecular weights as probed by Raman spectroscopy.Hyaluronic Acid Basics and Rheology.Oral Hyaluronic Acid Supplement: Efficacy in Skin Hydration, Elasticity, and Wrinkle Depth Reduction.Hyaluronic Acid: Redefining Its Role.Oral administration of hyaluronic acid to improve skin conditions via a randomized double-blind clinical test.In vivo stimulation of de novo collagen production caused by cross-linked hyaluronic acid dermal filler injections in photodamaged human skin.
