Ageing is a natural process, and one must embrace it with grace. However, while everyone ages, the human body starts to slowly show signs of ageing, only after ages 40 and above. These can be seen in wrinkles on face, reduced energy, brain fog, hair thinning etc. However, while ageing is inevitable and is a part of life, one must take steps to remain healthy while ageing, both physically and mentally. Here are 7 signs of ageing seen in people who are 40+, along with some science backed tips to slow it down.