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5 Key Elements of the Sleep-Hormone Connection

In the intricate symphony of our body's functions, the relationship between hormones and sleep cannot be underestimated this two-way connection affects every aspect of our life, from our mood to our eating habits to our energy levels. Here’s what it all means.

Recent studies suggest that sleep plays a crucial role in clearing toxins from the brain, including beta-amyloid, a protein associated with Alzheimer's disease – yep, you read that right. A good night’s sleep could be key to fighting cognitive decline. The glymphatic system, which becomes more active during sleep, helps flush out waste products, emphasising the importance of quality sleep for brain health. Recent findings suggest that hormones, particularly cortisol and noradrenaline, influence the emotional tone of memories consolidated during sleep. Understanding how hormones interact with memory processing during different sleep stages provides insights into the emotional aspects of sleep and mental wellbeing – let’s take a look at what’s involved. 


The intricate dance between insulin and sleep is often underestimated. Fluctuations in blood sugar levels can disrupt sleep patterns, leading to nighttime awakenings.

Insulin Resistance and Sleep Disorders: Insulin resistance, a condition where cells become less responsive to insulin's signalling, is associated with an increased risk of sleep disorders. Conditions such as obstructive sleep apnoea (OSA) and restless legs syndrome (RLS) are more prevalent in individuals with insulin resistance.

Circadian Rhythms and Insulin Sensitivity: Insulin sensitivity follows a circadian rhythm, with increased sensitivity in the morning and decreased sensitivity in the evening. Disruptions to circadian rhythms, such as those caused by irregular sleep patterns or shift work, can impact insulin sensitivity. Maintaining a consistent sleep schedule is crucial for supporting healthy circadian rhythms and insulin function.

Impact of Sleep Duration on Insulin Resistance: Inadequate sleep duration has been linked to insulin resistance. Sleep deprivation or insufficient sleep may impair the body's ability to effectively utilise insulin, leading to elevated blood sugar levels. Over time, this can contribute to the development of metabolic disorders such as type 2 diabetes.

Delve into the impact of balanced nutrition, mindful eating, and avoiding sugary snacks close to bedtime on stabilising blood sugar levels for a more uninterrupted and restorative sleep.

Oestrogen and Testosterone  

Sex hormones, such as oestrogen and testosterone, play roles beyond reproductive health. Imbalances in these hormones can affect sleep quality, particularly in women during hormonal transitions like menstruation, pregnancy, and menopause. 

Menstrual Cycle and Sleep: Oestrogen levels fluctuate throughout the menstrual cycle, and these variations can impact sleep. Some women may experience changes in sleep architecture, particularly during the premenstrual and menstrual phases. This can include disruptions in REM sleep and changes in sleep quality.

Menopause and Sleep Disturbances: The decline in oestrogen during menopause is associated with various sleep disturbances. Common issues include difficulty falling asleep, increased nighttime awakenings, and hot flashes that can disrupt sleep. Hormone replacement therapy (HRT) may be considered to alleviate these symptoms.

Rapid Eye Movement (REM) Sleep: Oestrogen is thought to have a protective effect on REM sleep. Reduced oestrogen levels, such as during menopause, may contribute to alterations in REM sleep. REM sleep is crucial for emotional regulation and memory consolidation, so disruptions in this phase can affect overall sleep quality.

Testosterone and Sleep: Testosterone influences the sleep architecture in men, contributing to the regulation of deep sleep stages, including slow-wave sleep (SWS). Adequate testosterone levels are associated with improved sleep efficiency and a higher percentage of SWS, essential for physical restoration and growth.

Sleep Apnoea and Testosterone: Low testosterone levels have been linked to an increased risk of developing sleep apnoea. Conversely, sleep apnoea can contribute to a decline in testosterone levels. This bidirectional relationship highlights the importance of addressing sleep disorders to maintain hormonal balance. 

Circadian Rhythms and Testosterone Release: Testosterone follows a circadian rhythm, with higher levels typically in the early morning. Disruptions to sleep patterns, such as those seen in shift work or irregular sleep schedules, can impact the natural release of testosterone. Maintaining a consistent sleep routine is essential for supporting healthy hormonal fluctuations.


Oysters contain serotonin and melatonin and are a great source of zinc, which is known to boost sleep. 

Melatonin, often referred to as the "sleep hormone," plays a pivotal role in regulating our sleep-wake cycle. Produced by the pineal gland in response to darkness, melatonin levels rise in the evening, signalling to our bodies that it's time to wind down. Explore ways to naturally boost melatonin production, such as creating a dark and calming sleep environment or incorporating melatonin-rich foods into your evening routine.

But supplements alone can’t undo unhealthy eating habits – what we put on our plates is foundational to our overall health. Keen to boost your gut, combat sugar cravings and feel fuller for longer? Come join us for the 8-Week Program. You don’t have to buy exotic ingredients or splash your cash on new appliances; every tool you need, you’ve likely already got, and our ingredients are easily found at your local grocer. Because we know how challenging it can be to make a change in your life, and it’s the little things that make it that much easier (and fun!). Take a look at some of the exciting recipes members enjoy:
  • Kale + Cauliflower Curry Puffs
  • Raspberry Breakfast Muffins
  • Prawn + Mango Tacos
  • Swede + Cannellini Bean Soup
  • Minty Salmon Brain-Boosting Bowl
  • Savoury Crepes
  • Spiced Sicilian Stew

Who knew quitting sugar looked this good? Muffins, pancakes and tortes are all a part of our fun 8-Week Program.


Cortisol, known as the "stress hormone," follows a distinct daily pattern. It peaks in the morning, promoting wakefulness and alertness, and gradually declines throughout the day. However, chronic stress can disrupt this rhythm, leading to elevated cortisol levels at night. Discover relaxation techniques, mindfulness practices, and lifestyle adjustments to manage stress and support a healthy cortisol rhythm for restful sleep. 

Growth Hormone  

Released predominantly during deep sleep, growth hormone plays a crucial role in cellular repair, muscle growth, and overall rejuvenation. Uncover the connection between deep sleep stages and optimal growth hormone secretion. Explore habits and rituals that promote deep, uninterrupted sleep for enhanced recovery and wellbeing.

Harmonising Hormones for Better Sleep

Understanding the intricate relationship between hormones and sleep empowers us to make informed choices that positively impact our well-being. By embracing habits that support the natural ebb and flow of these hormonal rhythms, we can cultivate a sleep environment conducive to restorative nights and energised days. Whether it's creating a calming bedtime routine, managing stress, or nourishing our bodies with balanced nutrition, the dance between hormones and sleep invites us to step into a world of harmonious slumber. Sweet dreams await as we navigate the intricate choreography of hormonal balance for a truly restful night.

 Need a little help getting your health back on track? We’ve put in the hard yards so you can enjoy the benefits of an extensive, wholistic program that covers everything from learning how to manage nutrition and mental health to social situations. When you join us for the 8-Week Program you’ll have exclusive access to expert guidance, nutritional planning and support every step of the way. Take a peek at what’s on offer:

  • 8 weeks of meal plans and shopping lists.
  • A range of exclusive recipes, including sugar-free desserts, snacks and all the old favourites.
  • Community forums to share and discuss your experience.
  • Expert support to guide you through each week – from world-renowned chef Sarah Glover to yoga teachers, nutritionists and naturopaths. 

Don’t wait, JOIN NOW!


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