Natural supplements combined with good sleep habits can be the solution to a good night's sleep without the need for sedatives. The sleep stack trio work together to promote a restful state within your body.

Natural supplements combined with good sleep habits can be the solution to a good night's sleep without the need for sedatives. The sleep stack trio work together to promote a restful state within your body. 

The Australian Deep Sleep Stack for Every Season

Are stress and bedtime doom scrolling bunking in with you at night? Sleep supplements can provide relief of insomnia symptoms without sedation. Supplemental magnesium L-threonate, L-Theanine and glycine have complimentary benefits of calming your nervous system, reducing mental and physical tension and promote your body's ability to fall into - and stay in - restful sleep.

Here we discuss the best natural sleep aids and how to tweak your supplements year round.

Disclaimer: This article is intended for informational purposes only and does not constitute medical advice. Always talk to your GP before commencing any new supplement regime.

The Core Trio: Magnesium L- Threonate, L-Theanine & Glycine

This powerful combination of supplements create a synergising effect that promotes faster sleep onset, deeper sleep and improved sleep quality without sedation.

Magnesium L-Threonate is a highly bioavailable form of magnesium that [4]:

• Crosses the blood-brain barrier effectively

• Supports memory, learning and cognitive performance

• May improve sleep quality, especially deep sleep

• May help reduce anxiety

• Supports overall brain health

L-Theanine is an amino acid naturally found in tea that [2]:

• Promotes relaxation without causing drowsiness

• Reduces stress and anxiety by increasing alpha brain waves

• May enhance sleep quality by calming the nervous system

Glycine is an amino acid that [3]:

• Acts as an inhibitory neurotransmitter and sleep-promoting compound by lowering core body temperature and calming the nervous system

• May improve sleep onset and quality

• May improve metabolic health

• Supports cognitive function and memory

How Magnesium L-Threonate Helps You Sleep on Summer Nights

When hot nights are holding your sleep hostage, magnesium L-threonate can help your nervous system shift into relaxation mode. Magnesium promotes neurotransmission of calming signals by assisting GABA; this helps calm the body's stress signals linked to cortisol. Magnesium L-theonate is a form of magnesium that is shown to raise magnesium levels within the brain and improve sleep outcomes alongside cognitive measures in some studies [1].

L-Theanine for Hot, Restless Evenings

Heat tends to make us more alert, which means we need to find ways to calm ourselves before we can drift off into sleep. L-Theanine is a naturally occurring amino-acid that can help by promoting a relaxed state without the need for sleep medications. L-Theanine research has shown that supplementation improved sleep quality of participants in several randomised trials [2].

While L-Theanine won't cool down your room, it can help you worry less, release tension and mentally unwind, helping you to fall and stay asleep through the night.

Winter Sleep Problems Down Under

More time spent indoors, low temperatures and less morning light can weaken circadian cues in your body, resulting in later sleep onset and more wakeful periods in the night.

Herbal and natural supplements - particularly glycine - may assist you in improving subjective sleep quality and reducing brain fog throughout the day.

Glycine: The Winter Sleep Hero

Glycine is an amino acid your body uses to create brain chemicals and help transfer calming signals via neurotransmitters. This can be particularly helpful on winter nights, when cold weather and longer nights often make us feel 'wired but tired'.

Glycine before bed may support sleep by calming the nervous system and helping the body drop core temperature by just the right amount to promote a sense of calm, improving sleep quality and next-day alertness in some studies [3].

Seasonal Dosage and Timing Adjustments

It's not only leaves that change with the season; your body's ability to regulate temperature and enter a state of calm also fluctuates through the year, because:

• Daylight length affects melatonin timing

• Core body temperatures are different

• Stress load and cortisol are often higher in winter

• Activity levels and dehydration are often higher in summer

• Higher temperatures typically reduce blood pressure naturally

You should adjust your levels of magnesium L-theonate, L-theanine and glycine as the seasons change, to reflect the changes in temperature, sleep pressure and natural cortisol rhythm.

Summer Vs Winter Stack Schedules

Best Sleep and Magnesium Supplements in Australia 2026

• Switch Mag3 | 100% Pure Magnesium L-Threonate - Easy-to-take powder form magnesium L-Threonate for non-sedative calming of the nervous system and to promote sleep quality. Click on the product to read more.
• Herbs of Gold L-Theanine 200mg - Take one capsule daily with food to calm the mind and relive symptoms of stress. Aids in the synthesis of neurotransmitters and supports mental clarity. Click on the product to read more.
• Switch Glycine 100% Pure Glycine - 100% Pure Glycine powder. 1000mg Glycine per 1g.

What to Avoid with the Stack Each Season

1. Avoid taking the same dosages sleep supplements year round due to seasonal changes in hormones and body function

2. Avoid ignoring any negative symptoms: if you notice:
   Morning grogginess > reduce glycine or magnesium
   Vivid dreams or more night waking > reduce magnesium first
   Anxiety despite sleepiness > increase theanine slightly

Always follow the advice of your healthcare practitioner when adjusting supplement dosages.

Lifestyle Tips to Boost the Trio Year Round

Natural sleep aids work best when used in conjunction with other sleep supports, including:

1. Block out curtains

2. Weighted blankets

3. Essential oils (particularly lavender)

4. Fans for room cooling

5. Herbal teas

6. Regular sleep schedules

7. Relaxation techniques before bed such as yoga and meditation

FAQs: Australian Deep Sleep Stack

Q: Are natural sleep aids safe?

A: As a general rule, natural sleep aids are considered safe for healthy adults. The sleep stack supplements have differing potential interactions and side effects [4]:

• Magnesium L-Threonate: potential side effects include loose stools and mild gastro intestinal upset. Magnesium can reduce the absorption of certain medications if taken too close together, including antibiotics, bisphosphonates and thyroid medication.

• L-Theanine: potential side effects include mild GI discomfort, headaches and dizziness. Theanine may ineract with some medications including antihypertensive drugs and CNS depressants including prescription sleep medicine.

• Glycine: potential side effects include mild GI upset and nausea. Glycine is usually well tolerated and clinically significant interactions with other medications are unlikely.

Q: Are melatonin supplements the best for sleep?

A: Melatonin is a hormone your brain makes at night to tell your body it's time to sleep. Melatonin typically helps with falling asleep, though doesn't necessarily improve sleep duration or overall sleep quality.

Combinations of supplemental magnesium, L-theanine and glycine can help to promote an overall state of calm within your body which may be more effective for stress induced insomnia and overall sleep hygiene.

Q: Are supplements good for sleep disorders?

A: Yes, although; while many people with sleep disorders do benefit from sleep supplements, those with chronic insomnia may require sedative medications.

That being said, herbal and natural products are usually well tolerated with few potential side effects and many consider this route prior to taking harsh pharmaceuticals. Very important: Follow the advice of your GP when deciding whether to have herbal supplements or prescription medications.

Q: How long do sleep supplements take to work?

A: Some supplements such as glycine may work on the first night you take them, though others including magnesium may take 1-3 weeks for noticeable benefits.

Conclusion

Magnesium L-Theonate, L-Theanine and glycine are natural sleep aids that can calm your nervous system, lower core body temperature, and reduce stress, helping you to fall asleep, stay asleep, and feel refreshed when you wake up.

Natural supplements can potentially replace the need for prescription sleep aids if used under advice of your healthcare provider. Adjusting dosages throughout the year is recommended to get the most out of your sleep stack.

References

[1] Lopresti, A., & Smith, S. (2025) The Effects of Magnesium L-Threonate on Cognitive Performance and Sleep Quality in Adults. https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2025.1729164/full?utm_

[2] Bulman, A., D'Cunha, N., et al. (2025). The Effects of L-Theanine Consumption on Sleep Outcomes: A Systematic Review. https://www.sciencedirect.com/science/article/pii/S1087079225000292?utm_

[3] Yamadera, W., Inagawa, K., Chiba, S. et al. (2016) Glycine ingestion improves subjective sleep quality in human volunteers, correlating with polysomnographic changes. https://link.springer.com/article/10.1111/j.1479-8425.2007.00262.x?utm_

[4] Salame, A., Mathew, S., et al. (2025). Over-the-counter products for insomnia in adults.
https://www.sciencedirect.com/science/article/pii/S1389945725000784