If you’re trying to support your health goals, improve your energy, or lose weight, there’s one factor that deserves far more attention than it usually gets: sleep. Because no matter how balanced your meals are or how motivated you feel, you simply can’t out-diet chronic exhaustion.
That’s why we asked Nutritionist Heidi Rose, who specialises in women’s metabolic health, to unpack why quality sleep has such a powerful impact on everything from cravings and hormones to energy, recovery, and overall wellbeing.
Because when you understand this, everything starts to shift. Instead of feeling frustrated with yourself, you can start recognising what your body is actually asking for and support it in a way that actually works.
WHAT'S THE CONNECTION BETWEEN SLEEP AND HUNGER?
One of the first things I look at with clients is how they’re actually sleeping. Are they waking multiple times through the night? Tossing and turning at 2am? Dealing with hot flushes? Struggling to get proper deep sleep? Because all of these things matter more than people realise.
Those sleep deprived cravings often come down to two key hormones: ghrelin and leptin. Think of them as your internal hunger team.
Ghrelin - is your hunger hormone.It’s like a little gremlin that gets louder when you’re sleep deprived. You know it's on the loose when suddenly everything looks like a snack.
Leptin - is your satiety hormone. It’s the one that tells your brain, “We’re good, we’re full, we’re satisfied.”
WHAT HAPPENS WHEN YOU DON'T GET ENOUGH SLEEP?
When sleep is consistently low (especially under 6 hours per night), things can start to shift:
- Ghrelin may increase (stronger hunger signals)
- Leptin may decrease (weaker fullness signals)
This can leave you:
- Feeling hungrier than usual
- Less satisfied after meals
- Craving quick-energy foods the next day
It's important to note that it’s not about discipline or “doing better.” Your body is simply trying to compensate for low energy and increased demand. And if you’re in a season of life with disrupted sleep (hello, kids waking overnight, stress, or shift work), this can be even more relevant. Sometimes the goal isn’t perfect sleep — it’s working with your current season, not against it.
HOW TO SUPPORT YOUR BODY ON LOW-SLEEP DAYS
Instead of restricting food or running on coffee all day, try supporting your body more intentionally:
- Prioritise balanced meals
- Don’t skip breakfast (even something simple helps)
- Stay hydrated
- Include protein regularly throughout the day
- Keep a protein-rich snack on hand if needed
- Use convenient options like a protein smoothie with Happy Way Protein Powder when life is busy
These small shifts can help support:
- More stable blood glucose levels
- More consistent energy throughout the day
- Less of the “crash and overeat” cycle later at night
Sleep isn’t just about rest, it plays a big role in how your hunger and energy are regulated. And while sleep isn’t always something you can control, how you support your body around it absolutely is.
6 SIMPLE WAYS TO SUPPORT BETTER SLEEP
1. Reduce screen time and bright lights before bed
Bright light exposure at night can influence melatonin production — the hormone
involved in helping your body prepare for sleep.
Try:
• Dimming lights at night
• Reducing scrolling before bed
• Using warmer lighting
• Wearing blue-light blocking glasses if working late
2. Keep a consistent sleep and wake time
Your body thrives on rhythm. Going to bed and waking up at similar times each day can help support your circadian rhythm, energy, and sleep quality.
3. Create an evening wind-down routine
Your nervous system needs cues that it’s safe to slow down.
This might look like:
• Reading
• Stretching
• Herbal tea
• Deep breathing
• Journaling
• Sipping on Happy Way Collagen Hot Choccy (which has magnesium glycinate)
4. Magnesium glycinate may support relaxation
Magnesium glycinate is commonly used to support relaxation and may assist with
muscle recovery and sleep quality in some individuals. Magnesium plays an
important role in nervous system regulation and muscle relaxation, which is why
many people find it helpful as part of an evening wind-down routine, especially
during stressful seasons, busy lifestyles, intense training periods, or
perimenopause when sleep can feel more disrupted.
Looking for an easy way to fulfil your daily magnesium intake? Try our flavoured Magnesium Powders or Collagen Hot Choccy.
5. Reduce caffeine, alcohol & stimulants later in the day
Caffeine and alcohol can both impact sleep quality, even if you fall asleep quickly.
Alcohol may reduce deep restorative sleep, while excess caffeine later in the day
can keep the nervous system more stimulated and alert.
6. If you’ve got a busy brain, do a “brain dump”
If your mind races at night, try writing down your thoughts, tasks, or worries before
bed. Getting things out of your head and onto paper can help calm the mental load and
support relaxation before sleep.
THE TAKEAWAY
Sleep is one of the foundations of metabolic health. It influences energy, cravings, hunger hormones, recovery, mood, and appetite regulation. Sometimes improving your health isn’t about doing more. Sometimes it starts with supporting your body to rest better.
Heidi x
This article is for general educational purposes only and is not intended to replace
personalised medical or healthcare advice. Please consult your healthcare
practitioner for individual support.
