'I'm a sleep expert – eat more of these cortisol-lowering foods to improve your rest'

Solen Le Net

By Solen Le Net


Published: 27/03/2026

- 18:10

'Magnesium plays a role in relaxation, lowering our cortisol levels and calming us'

Magnesium plays a vital role in the body's inner circuitry, supporting nerve function and bones – but it's perhaps best known for its role in sleep.

Although magnesium is usually taken as a supplement, obtaining it through food may prove more effective, according to sleep expert Rex Isap.


The CEO of Happy Beds says making dietary adjustments can help individuals meet their daily magnesium requirements.

"Magnesium plays a role in relaxation, lowering our cortisol levels and calming us, but not all supplements on the market contain an effective dose, and it will not override poor sleep habits," Mr Isap explained.

SLEEPING WOMAN

Reducing cortisol levels is essential for good sleep

|

GETTY

Foods abundant in magnesium include leafy green vegetables, various seeds, and legumes. Dark chocolate containing 70 to 85 per cent cocoa offers approximately 64mg per serving, making it a worthwhile swap for traditional milk chocolate beverages.

However, Rex cautions that dark chocolate contains caffeine, recommending consumption at least one to two hours before retiring for the night.

Beyond dietary considerations, creating an optimal sleep environment has gained considerable attention. Products such as weighted blankets, blackout curtains, and sunrise alarms are increasingly popular among those seeking improved rest.

"Light exposure and comfort have a direct impact on sleep quality," Mr Isap noted. "Blackout curtains help protect melatonin production, sunrise alarms support a more natural wake-up cycle, and weighted blankets can promote relaxation for some people."

These environmental modifications concentrate on establishing proper conditions for rest rather than pursuing quick solutions.

Mr Isap explained personal preferences remain paramount when designing a sleep sanctuary. Mattresses serve as a prime example, with individual tastes regarding firmness and materials varying considerably.

A mattress that fails to meet one's specific requirements can significantly diminish sleep quality.

Relaxation techniques have also emerged as valuable tools for those struggling to drift off. Pink noise, which operates similarly to white noise but produces deeper, more soothing sounds resembling wind, has established itself as one of the more credible trend-led methods.

This auditory approach is believed to mask disruptive sounds while reducing stress and lowering cortisol levels.

Box breathing represents another technique gaining traction for its calming properties. The method follows a straightforward pattern: inhale for four seconds, hold for four seconds, exhale for four seconds, then hold again for four seconds.

This breathing exercise is thought to assist with anxiety management and encourage mindfulness, preparing the body for restful slumber.

Both approaches focus on reducing stress hormones and inducing a state of relaxation conducive to quality sleep.

Despite the proliferation of sleep trends across social media platforms, Mr Isap maintains fundamental habits deliver superior results to fashionable techniques.

"Sleep is not one size fits all," Mr Isap explained. "If you focus on building a dark, cool and calm bedroom environment first, you are far more likely to see lasting improvements than by trying every trending hack."

DARK CHOCOLATE

Dark chocolate containing 70 to 85 per cent cocoa offers approximately 64mg of magnesium per serving

|

GETTY

Indeed, an excessive preoccupation with discovering the ideal sleep method can prove counterproductive, potentially worsening one's rest.

Mr Isap advocates directing attention towards modest yet meaningful adjustments. Maintaining a consistent bedtime and limiting screen exposure before sleep represent two such changes yield tangible benefits.

The overarching message is improvements stem from establishing reliable routines rather than pursuing the latest viral recommendations.