4 nutrition habits that disrupt healthy sleep

Sleep and nutrition influence each other every day. What we eat and drink helps set the body's internal clock and shape how well we sleep. Discovery's sleep research shows that one in two Vitality members have at least one sleep metric out of range, with sleep quality and regularity among the most common challenges.

Over time, everyday nutrition habits can weaken sleep, even when total sleep hours seem adequate.

"Sleep quality is shaped long before bedtime," says Dr Mosima Mabunda, Vitality's Chief Clinical Officer. "Our research shows that daily habits, including when and what we eat, influence how restorative sleep becomes. Small nutrition choices made consistently can either support recovery or disrupt it over time."

Here are four nutrition habits that often undermine sleep quality.

Eating too late in the evening

Eating should stop two to three hours before bedtime. Meals close to bedtime keep the body in an active digestive state when it should be preparing for rest. Late meals interfere with sleep timing and reduce deep, restorative sleep, especially when this becomes a regular habit.

Using alcohol to unwind

Alcohol fragments sleep later in the night. It reduces restorative REM sleep and increases awakenings, even when people fall asleep quickly. Discovery research shows that poor sleep quality is linked to higher fatigue, reduced concentration, and increased health risk over time.

Consuming caffeine too late in the day

Caffeine should be avoided for at least four hours before sleep. Even when people fall asleep quickly, consuming caffeine late in the day reduces deep sleep and delays the body's natural wind-down process.

Irregular meal timing

Eating at inconsistent times can throw off your body clock, which helps control both how you process food and how you sleep. Discovery data shows that inconsistent sleep patterns are linked to a higher risk of early death, especially when paired with getting too little sleep.

Sleep quality is built across the whole day, and not just when you go to bed. Consistent nutrition habits help protect the structure and rhythm of healthy sleep.

Vitality Sleep Rewards are designed to support consistent, healthy sleep over time, helping members build routines that improve recovery, daily energy, and long-term wellbeing.

Find out more about how you can get rewarded for sleeping better here: https://www.discovery.co.za/vitality/sleep-rewards