I don't want a long and healthy life. How you do it affords some wiggle room. There is no time to waste. You should have been getting your health in order before middle age. It's never too late to start. Each of us has a chronological age that is measured in birthday candles. Our biological age reflects how old we really are. Our genes, lifestyle and living conditions affect our age. You can change this biological age by doing what I'm about to tell you.

Be positive about it

80% of people say they feel younger than they are. Dr Serena Sabatini says that most societies view aging negatively. People who have good role models for aging, such as active grandparents, are more likely to be engaged in life and follow a healthier diet.

My mother is 98 years old and has no short-term memory. It's better than not being around.

Studies show consistent results in which diets protect us

Eat well

As our cells get damaged with age,flamming is what happens to the body. Chronic inflammation and health problems are the result. The British Nutrition Foundation's senior nutrition scientist says that studies show that a Mediterranean-style diet and theDietary Approaches to Stop Hypertension (DASH) diet protect us. Some fish, seafood, poultry, lean meat and lower-fat dairy products are included in the diet.

Evidence shows that the diet can delay cognitive decline in people with a family history of dementia.

Don’t bother with supplements

A balanced diet means you don't need supplements. The lack of sun in UK winters has prompted the government to suggest we take 10 vitamins a day from October to March. You shouldn't be doing anything except sitting because you shouldn't be doing anything except taking vitamins.

Maybe lose a bit of weight

Losing 3% of your body weight can reduce your risk of developing serious diseases. Black, Asian and other minority ethnic groups have a higher risk of serious health conditions if they don't control their weight.

Don’t focus on ‘superfoods’

The benefits of strawberries and blueberries are well known. The British Nutrition Foundation warns that the evidence is not conclusive.

My mum is fond of the fruit.

People need to consider exercise as part of their personal hygiene, like brushing your teeth, not something to ‘add on’

Exercise like you mean it

It is all about exercise. It reduces the risk of heart disease and lowers blood pressure. If you have been doing 150 minutes of exercise a week since your 20s, then you have achieved something. Professor Benjamin D Levine says that people need to consider exercise as part of their personal hygiene, like brushing their teeth. His research shows that exercise training can reverse the effects of heart failure if it is started in middle age.

Out of the 4-5 days of exercise, one day should be a high-intensity workout, two or three should make you sweat, and one can be less strenuous such as tennis the way I play it. Levine says 30 minutes of brisk walking five times a week is enough.

Resistance is the opposite of futile

Levine says resistance training is important to preserve strength, balance and functional capacity as we age. There are many ways to improve strength. I don't think flexibility has a big impact on mortality, cardiovascular disease or even musculoskeletal injury, though it is harder to improve.

No smoking

It's true! Does it need to say anything? Smoking while sitting down could make you age faster.

Manage the menopause

The marker of middle age is menopause, which makes women feel older. Does the loss of oestrogen speed up biological aging? Maybe a small amount. Steve Horvath, professor of human genetics and biostatistics at UCLA, says it is nothing to be alarmed about. Men are at a substantially higher risk of mortality than women.

The risk of osteoporosis and cardiovascular disease can be reduced by stocking up on calcium, cheese, and fish, and cutting down on saturated fat and salt.

The National Institute for Health and Care Excellence believes that the decision to use HRT to alleviate menopausal symptoms is an individual's, and not a group's, decision.

Socialise

It's not good to be lonely in middle age. Especially if you are a man. There is no clear reason why loneliness increases the risk of dementia, heart disease and depression. It's possible to be with a group of people and still feel lonely. Mind has tips on how to manage loneliness, which include volunteering and joining groups based on your hobbies.

Lady painting illustration

Illustration: Steven Gregor

Take up a hobby or language

Mental and physical activity are required for healthy aging. It is possible that artistic hobbies such as painting, sculpture or pottery can help with memory and thinking. Wordle is beneficial because it exercises your brain. There is some evidence that learning a second language can keep you sharp.

Sleep well

It's a myth that older people don't need as much sleep as they used to. It impacts on how people feel about themselves.

Look after your skin

The first sign of aging in the face is where you have no movement. You get a small pre-jowl, your cheeks shrink, and your face loses volume. We look tired because we lose elastin. People don't want to look tired, so they look older.

Sun damage makes skin look wrinkled and discoloured. Smoking is more harmful. On the plus side, he says that vitamins A and C work. If you want to get a prescription-level treatment such as retinoic acid, you need to invest in a private dermatologist. He administers theotulinumtoxinA on the grounds that it is reliable and wears off. You still want to be able to move your eyebrows, even though you can use a drug to open up your face.

Have money

The elephant is in this article. Research shows that more money gives you a better health trajectory as you get older. The richer have more years of disease-free life expectancy according to Dr. Spiers, senior research associate at the National Institute for Health and Care Research. It comes at a cost if you ask someone to eat a bit healthier or exercise more.

The head of research and product development at the BMJ is Dr. Luisa Dillner.