Path of fitness lies in your DNA

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Ever wondered if you were born with that sweet tooth? Or if you are likely to gain weight back after dropping the kilos?

A new test that is now available in Singapore promises to answer these questions - and more.

Called the Pathway Fit test, it analyses a person's genes to provide information about his metabolism, as well as the type of diet and exercise that would suit him best.

For instance, it reveals whether a person will reap more health benefits from endurance exercise, such as long-distance running - or if he would be better off doing strength training, which includes lifting weights.

It is offered by Parkway Shenton at its six Executive Health Screeners clinics at $1,488 (with GST). The price includes an initial consultation with a doctor and a review of the results at a later date.

The test is developed by Pathway Genomics, a United States firm that specialises in genetic tests.

All it takes is a saliva sample. This would be sealed in a test tube with a preservative gel, then air-flown to a laboratory in the US for analysis. One can expect to receive personalised results in three or four weeks' time.

NUTRIGENOMICS TEST

Mind Your Body understands that this is the only nutrigenomics test of its kind available at medical clinics here.

In fact, the field of nutrigenomics, which examines the link between food components and gene expression, is relatively new here and around the world.

But it is gradually becoming mainstream. Already, large insurance companies in the US are supporting clinical trials in this field, said Mr Michael Nova, chief medical officer of Pathway Genomics.

More than 75 genetic markers are analysed in the Pathway Fit test, he said. Conclusions are based on more than 35,000 studies previously done on these markers, he added.

The Pathway Fit test is the only test of its kind to be approved by the US Food and Drug Administration.

It comes with a detailed diet plan and a breakdown of the person's behavioural and metabolic traits.

The test is ideal for those who are seeking to manage their weight, said Mr Nova.

Since the firm started offering the test three years ago, more than 100,000 people from 44 countries have tried it. This includes people in Asian countries, such as Thailand, South Korea and Japan.

NOT EASY TO LOSE WEIGHT

Mr Rohan Perera, 38, is one of about 20 people in Singapore who have gone for the test since its introduction here in April.

Earlier in July, the project manager was diagnosed with severe obstructive sleep apnoea, where a person stops breathing many times during sleep due to an obstructed airway. As a result, he has to wear a breathing device to sleep every night.

"But I don't want to wear it for life," said the father of two, adding that he is aware that the sleep disorder is weight-related. "If I lose weight, I can lose the machine."

But it was easier said than done. He had been trying to shed weight in recent years, as he also had high blood pressure. Despite playing sports, such as tennis and football, and eating moderately, he was still stuck at square one.

"Something is not quite right. I am not obese and I don't eat sweet stuff," said Mr Perera, who is 1.74m tall and weighs 80kg. "Maybe I just need a bit of guidance."

That was why he opted for the Pathway Fit test, after his cardiologist suggested it to him.

One useful finding was that his body responds better to endurance exercise. "I love playing sports, but I realised I should also consider jogging," said Mr Perera, who started going for weekly 30-minute runs.

Insights into his dietary traits also helped. For instance, he was advised to eat more polyunsaturated fat, as people of his genotype tend to have a lower body weight if they include more of this "good fat" in their diets.

His wife now makes sure to include more nuts and fish in his meals, he said.

THE INFLUENCE OF GENES

Dr Crystal Ng, medical director of Executive Health Screeners, said that genetics account for 40 to 70 per cent of a person's predisposition to obesity, with environmental factors making up the rest.

"The test is not 100 per cent; it is not the gospel truth. But at least we know a bit more about ourselves," she said, adding that the knowledge may be enough to spur some people to make positive lifestyle changes.

Unlike other health screening tests, Pathway Fit does not tell a person whether he has a disease.

Still, a consultation with a doctor is important and essential to ensure each result is correctly interpreted, said Dr Ng. The appropriate medical recommendations, investigations and tests can then be discussed with the patient, based on existing medical conditions and health concerns.

Consultant cardiologist Rohit Khurana, director of The Harley Street Clinic Heart Specialists, said the use of gene testing to personalise a person's nutrition is "an innovative concept".

The clinic, which has branches in Mount Elizabeth Novena Hospital and Gleneagles Hospital, also recently started to offer the Pathway Fit test.

ROLE OF A GENETIC TEST

But Dr Khurana noted that it has yet to be proven in long-term trials that adopting a diet dictated by one's genes yields sustained weight loss and cardiovascular health benefits.

"I see the role of genetic testing as supplementing conventional advice, not replacing it," said Dr Khurana, who has recommended the new test only to a few high-risk patients, including Mr Perera.

For instance, it can help pre-diabetic overweight patients reduce their long-term cardiac risk, as the task is "more complex than calorie intake alone", he said.

So far, Mr Perera has managed to lose 3kg in the past three months.

A recent check-up also showed that his blood pressure has fallen into the normal range for the first time in about two years.

With that, he no longer has to take medication. "It's a simple test, painless and effortless," he said.

But the price tag, he admitted, is on the high side. "Perhaps it could be included as part of a health screening package," he suggested.

 
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