Imagine, for a moment, that someone launched a brand-new supplement.
Let’s call it “MetaboMax™”.
The marketing campaign would be impossible to ignore. It would promise to help regulate appetite, support a healthy body weight, improve energy levels, increase your motivation to be physically active, and promote better metabolic health. Influencers would be posting their “before and after” videos, podcasts would be hailing it as the latest breakthrough, and every wellness expert on Instagram would have an affiliate code offering you 15% off your first order. Within weeks, it would be sold out, the manufacturers would be making millions, and there would be a waiting list of people desperate to get their hands on it.
Someone would almost certainly release a premium version with added electrolytes.
Here’s the twist – this magical elixir already exists… drum roll… It’s called sleep.
Perhaps the biggest marketing mistake Sleep ever made was being free.
Because it doesn’t come in a fancy bottle, carry a hefty price tag, or promise dramatic results in 30 days, it’s easy to overlook. The science, however, tells a different story. This simple, everyday habit quietly influences many of the things you’re trying so hard to improve, from your appetite and energy levels to your motivation to move and your long-term metabolic health.
The reality is that somewhere along the way, we’ve become pretty good at making health complicated. We debate carbohydrates versus calories, argue about saturated fat, analyse food labels, compare wearable devices, and convince ourselves that the answer to better health must surely be hidden in the latest podcast, bestselling book, or biohacking gadget. Yet one of the most powerful lifestyle interventions available to us is something many of us willingly sacrifice every single day.
Last week, we had the privilege of interviewing Professor Marie-Pierre St-Onge, an internationally recognised expert in sleep, nutrition, and metabolic health, for a Live Chat with The Noakes Foundation. As luck would have it, just days before our conversation, her team published a study that reinforces an important message: sleep isn’t simply about feeling less tired. It influences many of the behaviours and biological processes that shape our long-term health.
The study, published in Annals of Internal Medicine, wasn’t based on extreme sleep deprivation. Participants weren’t surviving on four hours of sleep a night or pulling all-nighters. Instead, the researchers simply delayed bedtime by around 90 minutes, resulting in participants sleeping an average of 78 minutes less each night for six weeks.
To be honest, that sounds uncomfortably familiar. It’s staying up to finish one more report because tomorrow already looks even busier. It’s finally sitting down with a cup of tea once the children are asleep and deciding you’ve earned one more episode of your favourite series. It’s opening Instagram for “just five minutes” before realising it’s nearly midnight. Or it’s getting completely engrossed in a good book because, surely, one more chapter won’t hurt.
None of those decisions feels particularly significant at the time. In fact, they often feel completely justified. But when they become part of your daily routine, the consequences can quietly begin to accumulate.
Over the course of the study, the participants who slept less gained a small amount of weight, their waist circumference increased, and they became more sedentary, spending an average of 17 extra minutes each day sitting rather than moving. Those changes appeared to happen naturally as sleep was restricted, alongside changes in leptin, one of the hormones involved in regulating appetite and energy balance.
So the study wasn’t really only about sleep; it was about what sleep changes.
Chronic disease rarely develops because of one spectacularly unhealthy decision. It develops because small habits become “the normal”. You move a little less, gain a little weight, and tell yourself you’ll get back on track on Monday (or after the Netflix season ends).
At The Noakes Foundation, we believe that nutrition doesn’t exist in isolation, and good nutritional choices often start “yesterday”. Sleep influences the choices you make, appetite, motivation to move, and even the ability to cope with stress. Lifestyle medicine works because these habits are connected. When one starts to slip, the others often follow.
It feels like there is a never-ending quest to discover new supplements, clever gadgets, and the latest health trends because they feel exciting. Sleep, meanwhile, has been quietly doing its job all along, asking for nothing more than your time.
Improving your health isn’t about finding the perfect diet, the perfect exercise programme, or the perfect pillow. It’s about recognising that your health is shaped by dozens of small decisions you make every day. Some happen in the kitchen. Some happen when we choose to move our bodies. Others happen at the very end of the day, when we decide whether to watch one more episode or switch off the light.
Until someone bottles sleep as “MetaboMax™”, adds electrolytes, and sells it for R899 a month, it remains one of the most effective lifestyle interventions available to us. The difference is that this one has always been free!
References
https://www.acpjournals.org/doi/10.7326/ANNALS-25-01660