Ask A-list actresses who they trust with their skin care, and time after time, you'll hear the name Kate Somerville [1]. As the founder and director of Kate Somerville Skin Health Experts — a seriously gorgeous skin care clinic [2] in Los Angeles — she has become one of the most sought-after complexion experts.

Along with using a thorough skin care regimen (more on this soon!), Somerville says that eating well is key to having healthy, glowy, beautiful skin. "I think it’s huge – it’s almost everything," she says. For a few of her tips on eating right, .

• Drink plenty of water. "I think it’s important because it also cleanses your body," Somerville says. Our skin is our biggest organ, so if we’re unhealthy, it’s going to show in the skin."
• But don't drink too much soda or coffee. "Coffee is really hard on the skin because it's dehydrating," Somerville explains. "If you’re not eating right and you’re drinking a lot of coffee, your skin is the first thing that's going to show it."
• Go green. That means eating fresh vegetables, especially leafy greens such as spinach, kale, and lettuce. "The more green leaves, the better," Somerville advises. "If you eat live foods, you’re going to have the best skin that you possibly can have."