The 66-year-old British chef insists the secret to her glowing skin has nothing to do with Botox and instead can be attributed to a diet of high-fat food and staying out of the sun.
"I'm a great believer in butter. I just eat what I want. I enjoy life but also, I know myself. I'm not punishing myself trying to look like a model. So that's good - I just waddle and enjoy myself," she told The Mirror.
"I think [good] skin is genetic, really. I'm also allergic to the sun so I don't go into the sun and that makes a difference. It's been [that way] my whole life but it's got worse. I just can't go in it. It's a bore, actually."
Lawson also called cosmetic treatments a "tyranny" and insisted she would never have any work done on her face.
"Having a bit of fat on the face helps. I don't do filler or anything like that. Cosmetic work is a tyranny. I just think there's no point," she said.
Lawson also revealed she sees ageing as a privilege after losing her mother, sister and first husband to cancer.
Lawson's mother Vanessa Salmon, died of liver cancer when Lawson was 25 and eight years later, she lost her younger sister, Thomasina, to breast cancer at the age of 32.
In 2001, Nigella's first husband, broadcaster John Diamond - the father of her children, Cosima, 32, and Bruno, 29 - died from throat cancer, at the age of 47.
"It would be immoral if I complained about ageing - so I don't. We shouldn't complain about being old. Life is precious. I'm not saying we can't all moan about things - I think one has to be allowed to do that," she said.
"A sense of proportion is not always easy to hold onto. Loss is something you have to bear in you."
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