Direct-to-consumer gene-testing companies cover many areas of life. However, the scientific evidence supporting their products may be weak, so buyer beware!

DIET

Some companies are offering personalised diet advice based on a number of genetic markers – a field known as ‘nutrigenetics’. The idea is that matching foods to variations in genes that have been linked to obesity, fat metabolism and hunger will bring better weight control. And as a treat, you can buy bespoke beer or fine wines matched to your genes.

SPORT AND FITNESS

As well as matching your diet to your genes, you can tailor your workout, too. From weekend warriors to serious sportspeople, companies offer to analyse genes involved in aerobic (oxygen) capacity, power, endurance, blood pressure and even tendon strength to suggest an ideal training programme, along with a rest and recovery plan.

LOVE AND FAMILY

You can now look for a ‘DNA compatible’ partner, based on comparing a group of genes involved in the immune system known as the major histocompatibility complex (MHC). Parents can be tested to see if they’re likely to produce a child with a genetic condition. And once baby arrives, it’s even possible to order a genome test to see what character traits or health risks it’s inherited.

SKINCARE

Skincare companies are now offering DNA-based solutions that claim to turn a grotty face into a glowing one. By looking at genes involved in antioxidant protection – which prevents damage from UV rays and chemicals – and the breakdown of the collagen fibres that maintain skin’s plumpness, scientists create a personalised anti-ageing serum.

PETS

There’s no reason why your pet can’t get their genes tested, too! You can now prove whether your pup is pure-breed, or untangle the parentage of a mysterious mutt, as well as looking for health-related DNA variations. Like human DTC tests, you can even get ‘ wellness advice’ about diet, fitness and veterinary care tailor-made for your pet.