The 39-year-old actress, who also happens to have her own cookbook titled ''My Father''s Daughter'', has stuck to a strict diet in recent years.
“She sticks to a very strict macrobiotic diet which involves eating mainly grains and vegetables. She makes sure she chews every mouthful 13 times, at least.” Contactmusic quoted a source as telling the Daily Star.
The actress, who is married to Coldplay singer Chris Martin and is also mother of two, had previously hinted she needs extra help to make sure she looks good.
“She also does organic juice detoxes. It sounds boring but she looks incredible. She works out five days a week and does Pilates.” “Gwyn could pass for a 20-year-old. Her figure is amazing, you''d never know she''d given birth to two children,” the source added.