Testosterone: Can it make you live longer?

2013-02-04 06:44:17

Bombarded with adverts promising a longer, healthier life, BBC News Los Angeles

correspondent Peter Bowes goes in search of eternal youth.

Dr Jeffry Life, a Las Vegas-based age management doctor, is 74. He has the body

of a man half his age. In fact he has a level of muscular definition that many

men never achieve.

Genial, soft spoken, bald and lean, Life, who practised family medicine for

much of his career, is a poster child for the longevity business.

He was in his late 50s when he realised that as a paunchy middle-aged man, he

could drop dead at any time.

"I had really got out of shape, got a lot of body fat and was heading down a

disastrous course of diabetes and heart disease," he says.

Inspired by a muscle magazine that someone left in his examination room, Life

decided to get in shape. He started an intensive regime of working out at the

gym and within a year transformed his body.

In 1998 he entered a competition, the Body for Life contest, for people who

have made dramatic changes to their physique. To his surprise he won first

prize in the section for 55-year-olds and older.

"It changed my life and I felt great," he says.

But as he got older he says he noticed that he was losing ground and finding it

more difficult to maintain a lean body. While in his 60s, he visited Las Vegas

for a medical conference and was introduced to Cenegenics, an age management

company that aspired to make its patients "look and feel years younger". He

went on to become a senior partner.

Dr Life on a billboard in Las Vegas Dr Life (real name) is seen as an

inspiration

Life believes that the right kind of exercise and nutrition are important - but

correcting hormone deficiencies are the key to his success.

"I got my blood checked and I found that I was profoundly deficient in

testosterone," he says.

He now has weekly injections of the hormone.

The Life workout

Dr Life before and after

Monday: Chest - including 85lbs (38kg) bench presses

Tuesday: Back - using gym machines

Wednesday: Shoulders - 65lb dumbbell presses

Thursday: Arms - 60lb barbell curls, seated 30lb dumbbell curls, 100lb dumbbell

overhead extensions

Friday: Legs - including squats with free weights

Pilates three times per week

Exercise bike for 50 minutes five times a week - set to the hills programme

Taekwondo three times a week (he hopes to achieve black belt in two years, when

he will be 76)

"The problem is that when a man's testosterone gets low they lose their

incentive to go to the gym.

"Even if they want to, they dread going to the gym and exercising and it's a

losing battle. Especially abdominal fat around their belly. They spiral out of

control.

"A lot of men come to me who are suffering from male-menopause, known as

andropause, which creeps into their lives," he adds.

Andropause, says Life, is characterised by a decline in a man's sexual

function, cognitive ability, an inability to get rid of body fat and fatigue.

He adds: "When I get their testosterone up to a healthy level, it changes

everything. They get re-energised, they start seeing body fat disappear and

muscle growing."

Different laboratories vary in what they consider to be a normal testosterone

level. According to the Facey Medical Group, a health provider California, the

normal reference range is 250 to 1100ng/dl. The Mayo Clinic says testosterone

levels drop, within this range, by about 1% a year after the age of 30.

Andropause is not universally accepted by the medical profession as a definable

condition for middle-aged and older men, although there has been a huge

increase in the number of prescriptions for testosterone in recent years. As

well as injections, gels are available and are widely advertised. Last year the

British Medical Journal published a study which concluded that "many men in the

UK are receiving unnecessary testosterone replacement".

Dr Life in his office Life's before photo stays above his desk as inspiration

It is an area of medicine that is subject to much debate and often focuses on

the question of what is "normal" ageing.

Life argues that the medical profession is too conservative.

"Many doctors get the numbers and then they will tell their patient, 'Joe, your

levels are normal', when in fact it is within the reference range, but it's at

the bottom of the range. They don't tell you you're a D-student," he says.

Sex hormones - oestrogen in woman and testosterone in men - fulfil many roles

in the body. Studies have shown that they are involved in age-related changes,

such as the development of dementia.

Testosterone is fantastic," says Dr Christian Pike, a neurobiologist at the

University of Southern California, who specialises in the brain and Alzheimer's

disease.

"It increases aspects of cognition, it protects the brain from dying, it

reduces Alzheimer's disease, I mean, it's wonderful," he says.

But Dr Pike has reservations about the recent trend towards an increased use of

sex hormones to reverse the effects of ageing. He says further long-term

research is needed to fully understand the way testosterone affects the body.

"It makes me a tad nervous," he says.

"We know that prostate tumours respond to testosterone with incredible growth."

Pike says there is promising research focusing on what can be done to turn on

the brain's own testosterone-making system. He says relatively higher levels of

testosterone are associated with greater longevity and that people who live

longer have better levels of the hormone.

The challenge, he says, is balancing the benefits and the risks.

"So many of the factors that we are looking at are double-edged swords."