What is biohacking? Does it promise healthier, longer life? Doctor explains

From tracking your sleep score and monitoring blood sugar in real time to plunging into ice baths and timing your meals, biohacking has become one of the fastest-growing wellness trends.

Promoted by influencers, entrepreneurs and longevity enthusiasts alike, biohacking promises to help people feel more energetic, sleep better, think more clearly and even live longer.

But how much of it is backed by science, and how much is simply hype?

According to Dr Chirag Tandon, Director, Internal Medicine, ShardaCare Healthcity, biohacking is best understood as using lifestyle changes and technology to improve overall health and wellbeing - but it should never come at the expense of evidence-based medicine.

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What exactly is biohacking?

At its core, biohacking refers to making deliberate changes to your daily habits with the aim of improving physical or mental performance.

"Biohacking has emerged as a growing wellness trend, with more people experimenting with lifestyle changes and technology to improve their health, energy, sleep and longevity," says Dr Tandon.

The concept covers a wide spectrum - from simple lifestyle habits such as improving sleep and exercising regularly to more advanced practices involving wearable technology, personalised nutrition and health monitoring.

"From intermittent fasting and cold-water therapy to wearable fitness trackers, continuous glucose monitors and personalised supplements, biohacking aims to help individuals optimise their physical and mental wellbeing," he explains.

Which biohacks are backed by science?

Not every biohack is experimental. Some are simply healthy habits supported by decades of medical research.

Regular exercise, maintaining a healthy sleep routine, eating a balanced diet, managing stress and avoiding tobacco remain among the most effective ways to improve long-term health.

Technology can also play a helpful role. Wearable devices that monitor physical activity, heart rate and sleep can encourage healthier habits, while continuous glucose monitors may be useful for people with diabetes and, in specific situations, under medical supervision.

Intermittent fasting has also attracted considerable attention. While research suggests it may help some people improve metabolic health or support weight management, experts say its benefits vary from person to person and it is not suitable for everyone.

Where should people be cautious?

As biohacking has become more popular, social media has fuelled the rise of trends that often outpace scientific evidence.

Cold-water immersion, high-dose supplements, hormone optimisation and expensive longevity therapies are frequently promoted as shortcuts to better health. However, many of these practices have not been studied extensively in healthy individuals.

"While some of these practices are backed by scientific evidence, others lack sufficient research and may even pose health risks if followed without medical guidance," cautions Dr Tandon.

For example, excessive supplement use can interfere with medications or cause toxicity, while prolonged fasting may not be appropriate for children, older adults, pregnant women or people with certain medical conditions.

Similarly, ice baths and cold-water therapy may not be safe for individuals with heart disease or uncontrolled high blood pressure.

Can technology replace healthy habits?

The popularity of smartwatches, fitness trackers and health apps has made it easier than ever to measure daily activity, sleep and other health metrics.

However, experts say numbers should not become an obsession.

Wearable devices are useful for increasing awareness and encouraging consistency, but they cannot replace medical advice or routine health check-ups. A perfect sleep score or daily step count does not necessarily mean a person is healthy overall.

Instead, technology should be viewed as a tool that supports healthy behaviour rather than defining it.

How to biohack safely

Dr Tandon believes the safest approach is to focus on habits that have strong scientific backing rather than chasing every new wellness trend.

"People should understand which biohacks are genuinely beneficial, which are driven by trends, and how they can safely incorporate evidence-based habits into their daily lives without compromising their health," he says.

Experts recommend starting with the fundamentals: prioritise seven to nine hours of quality sleep, eat a balanced diet rich in whole foods, exercise regularlym manage stress through sustainable techniques such as mindfulness or yoga, use wearable devices as guides rather than diagnostic tools, and speak to a healthcare professional before beginning restrictive diets, supplements or intensive biohacking programmes.

The final takeaway

Biohacking is not a magic formula for perfect health. In many cases, it simply repackages familiar advice - sleep well, eat better, move more and understand your body - with the help of modern technology.

While some biohacking practices may offer genuine benefits, others remain unproven or unsuitable for everyone. As Dr Tandon points out, the goal should not be to follow every trend, but to build healthy, evidence-based habits that are sustainable over the long term.

After all, the most effective biohack may not be the most sophisticated gadget or expensive supplement - it may simply be making consistently healthier choices every day.