And other pressing questions answered by a Korean skin-care expert.

Get to know your retinoids. 

Not too harsh, not too weak. Just right.

Twelve easy beauty tips.

Like two lightly glazed doughnuts.

She's talking about what makes beauty meaningful.

Fragrant body-polishing.

There's an order.

She talks sensitivity, skin care, and getting kicked out of a German fruit stand.

Good things come in small, coffee-inspired packages. 

"There’s definitely no other European influence in terms of beauty. Who is more iconic in the world than Kate Moss and Kate Middleton?"

Something a little more complicated than smearing wildly.

For anyone who's ever used a face brush and said, "Owww." 

Not in a creepy Hannibal Lecter way. 

It's all in the cotton balls. 

Just don't drink it. 

The cult following of a very, very stinky lotion.

Sunflowers on your face, thanks to Gwyneth.

Gwyneth Paltrow's holistic doctor, Dr. Frank Lipman, explains the concept of "friendly" bacteria.

Proof that all-natural retinols work.