What are the key ingredients in Core ZZZ?

Core ZZZ is built on high-potency neurotransmitter precursors, adaptogens, amino acids and melatonin, taking a no-compromise approach to restoring body and mind during sleep.

Is Core ZZZ stimulant free?

Yes. Core ZZZ is a nighttime sleep and recovery formula with no stimulants, intended for use before bed rather than during the day.

Why is melatonin included in Core ZZZ?

Melatonin is included as part of the sleep-onset side of the formula, supporting the goal of falling asleep faster alongside the amino acids, adaptogens and neurotransmitter precursors.

What do adaptogens add to a sleep formula?

Adaptogens are included to support the body during periods of high stress and heavy training, which is often what disrupts sleep quality in the first place.

Who is Core ZZZ designed for?

It is designed for athletes and gym-goers who need advanced recovery support during sleep, individuals with insomnia, poor sleep quality or high stress, and those experiencing cognitive fatigue or mood instability due to poor rest.

How is Core ZZZ more than a basic sleep aid?

Rather than only helping with sleep onset, it is positioned as a full-spectrum recovery tool aimed at overnight physical and cognitive regeneration, so hard training can be repeated cycle after cycle.

When should Core ZZZ be taken?

Core ZZZ is a nighttime formula, taken in the evening before bed. Follow the serving directions on the Core Nutritionals label.

Can Core ZZZ support mood as well as sleep?

The formula is aimed at users seeking a well-balanced product for muscle, mood and recovery, with neurotransmitter precursors included alongside the sleep ingredients.

Where can I buy Core Nutritionals ZZZ in the UK?

You can buy Core Nutritionals ZZZ in the UK directly from Cross The Limits.

Core Nutritionals ZZZ: sleep and recovery formula | Cross The Limits UK Shop Vitamins & Supplements

Core ZZZ by Core Nutritionals is a premium sleep and recovery formula designed to help you fall asleep faster, sleep more deeply, and maximise overnight physical and cognitive regeneration. More than just a sleep aid, ZZZ is a full-spectrum recovery tool designed to help athletes, bodybuilders, and individuals who train hard bounce back stronger with every cycle of rest.

Packed with high-potency neurotransmitter precursors, adaptogens, amino acids, and melatonin, Core ZZZ takes a no-compromise approach to restoring your body and mind while you sleep.

WHO IS IT FOR?

Athletes and gym-goers who need advanced recovery support during sleep
Individuals with insomnia, poor sleep quality, or high stress
Those who experience cognitive fatigue or mood instability due to poor rest
Users seeking a well-balanced formula for muscle, mood, and REM recovery overnight

CONCLUSION

It 'sZZZ, not just about falling asleep—it's about waking up better. This is a comprehensive formula designed for athletes who train intensely and require deeper recovery. Whether you're aiming to boost recovery, balance your mood, or reprogram a disrupted sleep cycle, Core ZZZ provides the nutrients and neurological support to make sleep truly effective.

Our experience: smoother transitions to sleep, longer rest periods, and drastically improved morning recovery. Ideal for individuals training at high volumes or recovering from accumulated sleep debt.

INGREDIENT BREAKDOWN

Vitamin B6 (10 mg): Supports neurotransmitter synthesis and helps convert 5-HTP to serotonin, an essential step in melatonin production.

Magnesium (450 mg): Crucial for muscle relaxation, stress reduction, and deep sleep support. One of the most commonly deficient minerals in athletes.

Zinc (30 mg): Essential for hormone production and immune system regulation. Zinc also contributes to improved sleep quality and muscle recovery.

Recovery & Sleep Matrix

GABA (Gamma-Aminobutyric Acid) – 3000 mg: The primary inhibitory neurotransmitter in the brain, GABAA, promotes calmness, reduces anxiety, and primes the nervous system for sleep.

L-Glycine – 3000 mg: An amino acid that improves sleep onset, enhances sleep depth, and aids overnight recovery and muscle repair.

L-Tryptophan – 1000 mg: Precursor to serotonin and melatonin. Helps regulate mood and promotes healthy sleep cycles.

L-Ornithine HCl – 400 mg: Supports ammonia detoxification and may reduce cortisol levels. Often used to improve sleep quality and physical recovery.

Mucuna Pruriens Extract (50% L-Dopa) – 250 mg: Enhances dopamine production for mood support, neural regeneration, and hormone optimisation.

L-Theanine – 200 mg: Promotes alpha-wave activity in the brain, allowing for relaxation without sedation, thereby smoothing out transitions into deeper sleep stages.

5-HTP – 150 mg: Converts directly to serotonin and helps maintain mood balance, regulating melatonin to promote a consistent sleep-wake cycle.

Melatonin – 5 mg: A key sleep hormone that shortens the time it takes to fall asleep and improves REM duration and quality.

DOSAGE – TIMING – FOLLOW-UP

Recommended Use:Mix one scoop (13.5 g) with 200–250 ml of water and take 30 minutes before bedtime.
Cycle Duration:Safe for regular use. Can be used year-round or during cutting, deload, or post-cycle recovery phases.
Stacking Advice:Works well with ZMA or adaptogens.

Use only on nights when full sleep is possible (7+ hours).
Avoid using alongside other melatonin-containing products. They are NS depressants.