The 43-year-old star tells PEOPLE in this week's issue that she relies on balance in her life to keep her feeling her best.
"I think it's really important to be happy, and I think women get happy by being authentic," she says. "But I also believe in exercise, eating well, drinking lots of water, sex, sleeping and being around people who make you feel good.
"And I think that glow that you get in life comes from a combination of all those things."
For more on why Gwyneth Paltrow is feeling better than ever, pick up a copy of PEOPLE on newsstands Friday
The GOOP guru is taking her love for all things green to the next level with her very own skin care line in collaboration with Juice Beauty. Launching March 1, the non-toxic collection comes on the heels of a her recent makeup collaboration with the brand.
The entrepreneur and mom of two says that she created the line because she feels that "women deserve to have a really effective, beautifully made product that's non toxic and organic."
With a lengthy career, family and GOOP under her belt, Paltrow says aging doesn't faze her one bit.
"I earned these gray hairs," Paltrow declares. "I really am not afraid of getting older."