Heidi Klum: Being too thin makes you look older

The 37-year-old Project Runway star shares her tip with readers of US fitness magazine Self.

The mum-of-four, who is married to British singer Seal, says: 'The ultimate beauty secret for a woman getting older is, 'Don't be too thin!'

'It is always better to have a little meat on your bones.

'When you are just muscle, you end up being gaunt in the face, and that makes you look older by five or 10 years.'

The supermodel also tells the magazine that she is not afraid of ageing and won't be rushing to get Botox injections anytime soon.

'I don't think of getting older as looking better or worse; it's just different,' she says. 'You change and that's OK.

'Life is about change. I don't have anxiety about it, so I'm not running to get Botox.

'Maybe that will change, but I don't think so. I feel comfortable in my skin and comfortable with ageing, so I think it's OK that I get wrinkles.'