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The power of eating to support your Circadian rhythms
6 minute read

The power of eating to support your Circadian rhythms

Our bodies function on a circadian rhythm, a 24-hour internal clock that governs everything from sleep and energy levels to metabolism and hormone production.

Why its important to re-set in spring

Research by Professor Satchin Panda, a leading expert in circadian biology, has shown that when we eat is just as important as what we eat.

By following Time-Restricted Eating (TRE), aligning meals with our body’s natural rhythms, we can enhance energy, support digestion, balance hormones, and even improve longevity.

Why eating at the right time matters

Your body is designed to metabolise food most efficiently during the day, when metabolism, digestion, and insulin sensitivity are at their peak. Once evening starts our melatonin levels increase which slows down the digestive processes and inhibits our ability to digest food. Eating late at night or extending your eating window can disrupt the delicate balance, leading to hormonal imbalances and metabolic dysfunction.

1. Insulin and fat storage

Eating late in the evening can increase insulin resistance, making it harder for the body to regulate blood sugar and burn fat efficiently. This can lead to:

  • Increased fat storage
  • Higher risk of type 2 diabetes
  • Energy crashes and sugar cravings

Optimal eating window: Start eating within 1-2 hours of waking and finish meals at least 2-3 hours before bed.

2. Melatonin and digestion

As evening approaches, the body releases melatonin to promote sleep. However, melatonin also reduces insulin sensitivity, meaning food eaten late at night is more likely to be stored as fat rather than used for energy. This can cause:

  • Poor digestion and bloating
  • Increased inflammation
  • Disrupted sleep cycles

Best practice: Stop eating at least 2-3 hours before sleep to support natural melatonin production.

3. Cortisol and stress eating

Cortisol, our stress hormone, follows a natural rhythm—rising in the morning to wake us up and falling in the evening to help us unwind. However, eating outside your natural circadian window (especially late at night) can disrupt this cycle, leading to:

  • Increased stress and anxiety
  • Poor sleep quality
  • Uncontrolled hunger and cravings the next day

Solution: Align meals with daylight hours to support healthy cortisol levels.

The Benefits of Time-Restricted Eating (TRE)

  • Balances hormones supports insulin, melatonin, and cortisol regulation
  • Enhances metabolism encourages fat-burning and energy efficiency
  • Boosts energy levels reduces inflammation and supports mitochondrial health
  • Improves sleep helps melatonin function properly for deep rest
  • Reduces cravings prevents late-night hunger and unnecessary snacking.

How to implement TRE with Rejuvenated’s supplements

Eat within a 8-10 hour window (e.g., 8 AM - 6 PM) for optimal metabolic function.

Avoid eating late at night to prevent insulin resistance and fat storage.

Take Regenerate in the morning to kickstart NAD+ production and cellular energy.

Take Cellular Calm Complex in the evening to support relaxation and circadian alignment.

Prioritise whole, nutrient-dense foods to fuel your body effectively.

Cellular Calm Complex

Cellular Calm Complex

Calm and Protect

  • Vegan friendly
  • 60 capsules
  • Gluten & lactose free

From as low as £19.96 / £0.66 per day

Regenerate NAD+

Regenerate NAD+

Repair. Restore. Rebuild. Renew. Revive.

  • Vegan friendly
  • 30 capsules
  • Gluten & lactose free

From as low as £38.80 / £1.29 per day

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