Frequently Asked QuestionsRetinal versus retinol: What's the difference?“Retinal and retinol are both vitamin A derivatives, but retinal is one step closer to retinoic acid—the...

What are the most effective hydrating ingredients for skin?Dermatologists agree that components like hyaluronic acid, glycerin, and ceramides are considered highly effective for lasting...

Frequently Asked QuestionsWhy has PDRN become so popular in Korean skin care specifically?The rise of PDRN in Korean skin care is a natural extension...

Frequently Asked QuestionsHow does lactic acid compare to other exfoliating acids?Compared with other chemical exfoliants, lactic acid “is generally considered one of the gentler...

FAQ'sWhat is niacinamide?A form of vitamin B3 commonly found in meat, fish, milk, eggs, and green vegetables, niacinamide is an essential vitamin that helps...

Frequently Asked QuestionsWhat makes Korean vitamin C serums different from Western formulas?Korean vitamin C serums are more about the long game than instant gratification,...

Frequently Asked QuestionsIs mandelic acid more gentle than glycolic acid or lactic acid?Yes, mandelic acid is generally considered gentler than glycolic and even lactic...

Frequently Asked QuestionsDo growth-factor serums really work?In short, yes. “Data suggest that well-formulated, high-quality growth-factor serums can deliver measurable benefits,” says Dr. Murphy-Rose. “With...

Why we love it: If you were going to trust any brand to make retinol both effective and gentle, it would be Haruharu Wonder....

The serum is also super hydrating thanks to hyaluronic acid, so your skin is smooth and taut. As far as where this serum fits...