SKU: 5192026222

Core Nutritionals | ZZZ | Natural Sleep Formula

Sale price$35.99 Regular price$39.99
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 12 - Jul 17

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Core Nutritionals | ZZZ | Natural Sleep FormulaNight Time Recovery & Sleep Support 5 HTP Improves quality of sleep with no withdrawal effect Mucuna pruriens Improves GH release during sleep for better recovery L Glycine Aids in digestion and lowering blood sugar Sleep Aid & Recovery You know the feeling: heavy weights, a treadmill, and looking up at the clock every minute. Its not your dietyour food journal is so detailed it makes engineers blush. Its not your supplementationyoure using the Core

Night-Time Recovery & Sleep Support

  • 5-HTP - Improves quality of sleep with no withdrawal effect
  • Mucuna pruriens - Improves GH release during sleep for better recovery
  • L-Glycine - Aids in digestion and lowering blood sugar

Sleep Aid & Recovery

You know the feeling: heavy weights, a treadmill, and looking up at the clock every minute. It’s not your diet—your food journal is so detailed it makes engineers blush. It’s not your supplementation—you’re using the Core lineup. The real issue was a night of tossing and turning, with snoring and a barking dog. If recovery is the key to success, Core ZZZ is the locksmith. This product is designed to maximize recovery, including only effective recovery agents at proper serving sizes to remove guesswork. Its ingredients were chosen for the pathways they target, ensuring every physiological pathway is covered. No more tossing nights or wasted workouts—make recovery the priority by placing Core ZZZ at the center of your supplement lineup.

Full Science

If recovery is the key to success, then say “hello” to the locksmith. Core ZZZ is a perfectly-designed product with a single goal in mind: maximizing your recovery. We have included only the best and most effective recovery agents, at the proper serving sizes, to take the guesswork out of a good night’s rest. We have also specifically chosen these ingredients for the pathways they target, ensuring that every possible physiological pathway for recovery is covered.

No more tossing nights and no more wasted workouts – put recovery at the top of your list by putting Core ZZZ at the center of your supplement lineup.

Mineral blend (Vitamin B-6 (as Pyridoxine HCL), Magnesium (as Magnesium aspartate), and Zinc (as Zinc monomethionine)):

Sleep is important, but sleep is not important for its own sake. Rather, we sleep because of the collection of physiological processes that it enables: the repair of tissue, the biosynthesis and release of hormones, and so on. While each of the individual ingredients in our mineral blend is important in this regard, the formulation as a whole has previously been demonstrated to have tangible physiological effects.

In a randomized, double-blind, placebo-controlled study, 27 NCAA football players consumed a supplement containing Vitamin B-6, Magnesium, and Zinc, or placebo, for an 8-week period. Measurements for free testosterone, IGF-1, and muscle strength and power were taken at the conclusion of the study. The authors found statistically significant increases to all measured indices, with a particularly high spike in free testosterone as compared to placebo.

Gamma-aminobutyric acid (GABA):

GABA, known technically as, γ-Aminobutyric acid, is a potent depressive and the chief inhibitory neurotransmitter in the human brain. As GABA plays a critical role in the sedative and depressive functions of the brain, GABA receptor subtypes – principally GABAA – have been positively associated with the regulation of the sleep-wake cycle.

Given its pivotal status in the regulation of sedation and sleep, both GABA itself as well as GABA agonists (GABAergics) have been researched for their capacity to modulate sleep and mood. A 1996 animal model study established that stimulation of the GABAA receptor-subtype through exogenous GABA intake led an increase in the length of slow-wave sleep. A further 2006 study found that increasing plasma levels of GABA through supplementation was associated with regulation of the posterior hypothalamus “sleep-wake switch,” a physiological mechanism used to control sleep in mammals.

In addition to GABA’s potential role in the regulation of sleep itself, additional research has uncovered that GABA may potentiate certain benefits of deep sleep – namely, the increase in plasma growth hormone. The first study to demonstrate GABA’s growth-hormone potentiating effect was a 1980 study in 19 healthy subjects. This placebo-controlled trial found that a 5 gram serving of GABA significantly increased plasma levels of growth hormone as compared to controls. A further study in 2008 demonstrated similar results, with 50% increases in plasma levels of certain growth hormone isoforms in response to GABA administration in healthy subjects.

L-Glycine:

L-Glycine is a non-essential amino acid, so-called because the human body is capable of synthesizing glycine from sources internal to the body (serine). Like many other amino acids, glycine possesses physiological effects independent of its function as a ‘building block’ to protein. In glycine’s case, its physiological effects stem from its role as a neurotransmitter in the human brain.

Three methodologically-sound studies have investigated glycine’s effect on sleep and sleep quality in humans – and each used the same serving size as that found in Core ZZZ, 3 grams. In studies conducted in 2006 and 2007, ingestion of 3 grams of glycine prior to sleep was found to have both subjective and objective positive effects on sleep. Subjectively, participants reported more satisfactory sleep, less daytime sleepiness, and improved cognitive function. Objectively, PSG measurements revealed less latency to sleep onset and deep sleep. These results were confirmed in a more recent 2012 study which focused principally on glycine-dependent improvements to daytime cognitive function in sleep-deprived volunteers.

Overall, these human trials suggest a possible role for glycine in the regulation of beneficial sleep cycles at a serving size of 3 grams.

L-Tryptophan

L-Tryptophan is an essential amino acid, and one of the most critical in the human body. Tryptophan is critical because it is the biological precursor to both serotonin (one of the body’s principal neurotransmitters regulating mood, appetite, and sleep) and niacin (a vitamin and a crucial biological intermediate).

Among dietary supplements or ingredients purported to regulate the sleep-wake cycle, tryptophan is perhaps the most well-studied. The body of literature pertaining to tryptophan’s sedative effects is vast and varied, reaching back at least 40 years and featuring hundreds of articles. Despite the enormity of this body of literature, and therefore potential for disagreement or conflicting data, scientific consensus exists that tryptophan exerts positive effects on the regulation of the sleep wake cycle in humans – evinced by placebo-controlled trials in humans.

One such placebo-controlled, double-blind trial involved 10 healthy volunteers ingesting either 1.2 grams or 2.4 grams of tryptophan prior to sleep. Blood and urine measurements were taken at regular intervals, and sleep was measured both objectively (latency to sleep) and subjectively using the Stanford Sleepiness scale. Both serving sizes of tryptophan were highly correlated with a significant reduction in sleep latency and significant improvements to subjective sleep quality on the Stanford Sleepiness Scale.

Results such as this have been reproduced in dozens of clinical trials involving healthy/normal and sleep-disturbed subjects, men and women, younger and older participants, and featuring serving sizes as low as 500mg and high as 15 grams. These studies nearly universally reflect that exogenous tryptophan supplementation is positively correlated with an improvement in sleep quality and an objective reduction in sleep latency – with the best effect’s resultant from a 1 gram to 1.5 gram serving size.

L-Ornithine HCL:

L-Ornithine is a non-protein amino acid, meaning that, unlike most other amino acids, it is not involved in the production of proteins and is not encoded by DNA. In humans, ornithine is most commonly associated with the urea cycle, though recent research has revealed a potential role for ornithine in the regulation of sleep and arousal.

Though data on ornithine is not extensive, recent research has demonstrated that it may play a role in both objective and subjective assessments of sleep quality in humans. In a double-blind, placebo-controlled, randomized trial, 400mg or placebo was administered to 52 healthy adults experiencing mild fatigue. Ornithine was consumed consecutively for 8 weeks, with measurements for cortisol being collected – along with both subjective and objective measures of sleep quality.

At the conclusion of the trial, most participants experienced both subjective and objective improvements to the quality of their sleep. The researchers also noted that ornithine supplementation resulted in a small but statistically significant reduction to plasma concentrations of cortisol.

Mucuna pruriens Extract (seed) (50% L-dopa):

Mucuna pruriens is a hanging or climbing plant endemic to India and sub-Saharan Africa. The plant has been used extensively in the Indian traditional medicinal system known as Ayurveda for a number of purposes, including virility and gastrointestinal disorders.

In the context of recovery, data is limited but promising. In a 2012 study, 18 healthy men and women with impaired sleeping were given a supplement containing Velvet Bean (MP) for 28 days. At the conclusion of the study, the participants completed the well-regarded and industry-standard Pittsburgh Quality Sleep Index.

The authors note that supplementation with the Velvet bean-containing product improved the reported scores in every category of the PQSI. Many categories saw improvements of over 50%. Moreover, the authors noted both that Velvet Bean, not the other ingredient in the studied supplement, was the bioactive compound responsible for these effects, and that Velvet Bean has been demonstrated to improve GH release during sleep in other independent trials.

L-Theanine:

L-Theanine is a non-protein amino acid found mostly in green tea. The structure of L-Theanine closely resembles L-glutamic acid and has a mechanism of action they may be mediated through glutamate receptors, a possibility supported by its partial co-agonistic effect on the N-methyl-D-aspartate receptor. Due to L-Theanine being a widely ingested phytochemical during normal every day life, it has the potential to be an ingredient in many nutraceutical applications due to its proposed benefits on cognitive function and neuroprotective properties. L-Theanine has been studied in several instances on its benefits in these areas. In humans, L-Theanine has been shown to play a beneficial role in tasks requiring heightened focus and attention as well as positive effects on mental state, including improved sleep quality. A four week, randomized, placebo controlled and double-blind study consisting of 30 individuals assessing L-Theanine’s influence on stress related symptoms and cognitive function resulted in positive outcomes. At 200mg per day results revealed positive benefits sleep quality, decreased sleep disturbance, and reduced need for sleep medication. For cognitive function, verbal fluency and execution during concentration required tasks was also increased. The benefits of L-Theanine have mostly been studied for its acute effects on the user. Long term effects can likely be seen by how the acute affects influence changes in lifestyle. However, studies like this are promising on the benefits of L-Theanine.

5-HTP (5-hydroxytryptophan):

Serotonin has often been at the center of the discussion in the regulation of sleep. This “feel good” hormone has been shown to be essential in many physiological functions including circadian rhythm, thermoregulation, cognition, and nociception. When serotonin levels are low, it is critical to find ways to restore balance. Supplementation, to help with recovery and sleep, can be beneficial in reducing stress and restoring this balance. 5-HTP (5-hydroxytryptophan) is a natural chemical compound that has been shown to benefit certain aspects of health, including mental function and sleep quality as it is a natural precursor to serotonin in the brain. 5-HTP passes the blood brain barrier easily, making it very efficient in its action. 5-HTP, when combined with other nutrients such as GABA, may be effective at decreasing time required to fall asleep and improving sleep quality and duration.

Melatonin:

Irregular sleep is a problem that is common amongst the population and most are often searching for remedies to improve sleep quality and circadian rhythms. Melatonin is a neurohormone that is secreted by the pineal gland known for its sleep regulation properties. Its secretion is often suppressed by light, which when this occurs can often disrupt normal sleep patterns. When sleep patterns are disrupted and irregular, it has the ability to increase risks of certain health issues and premature aging. Supplementation exerts most of it benefits through decreased sleep latency and increased onset of sleep. This can also be related to its ability to work with the biochemistry and decrease body temperature in users. Supplementation with melatonin is the most efficient way to increase melatonin levels prior to sleeping. However, diet and improvements in quality of life are also ways to improve normal melatonin secretion as well as normal circadian rhythm for better quality sleep.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 5192026222

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.3 ★★★★★
Based on 989 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
E
Verified Purchase
eeeggg
Birmingham, US
★★★★★ 4
I believe equal to name brand rhyming with NitroGina
I believe it is equal to the name brand mentioned on the front side of the tube. It is 55 SPF Sun Protection Factor so it offers strong UV A and UV B protection which are the 2 ranges of sun rays that do the skin damage and burning. It is an easily absorbed lotion that when rubbed goes into the skin and is not visible. It feels good after being rubbed in in that it feels dry and not overly greasy or with no shine and sheen. If you put on a shirt over your skin with lotion it will appear on the inside of a dark shirt but it will wash out right away when that shirt is washed. It is a good product and offers burn protection to me in some clear-sky strong sun uses. Reapply after entering the pool or after an hour (all sunscreen labels say reapply after 80 minutes which I believe is per recommendations of the federal FDA or some medical studies). I reapply often and I still get tanned but I do not want to burn.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 10, 2025
R
Verified Purchase
Ragdollyanna
Los Angeles, US
★★★★★ 5
Super impressed by this!
Love this sunscreen and will be reordering it. It’s sheer, light, invisible, gives me the protection I need for my middle aged skin and I can swear my complexion has gotten better since I started using it. I’m super impressed how it’s comparable to more expensive brands in quality without the high price tag. It’s made me start looking into other skin products I can purchase from the Amazon brand.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 3, 2026
J
Verified Purchase
jmatthie
Waukegan, US
★★★★★ 5
How is this SO good?
I'm a sunscreen enthusiast. I wear sunscreen every day, and I know how hard it is to find one that is actually pleasant to use. It goes on like a white paste but it quickly blends in to the skin and becomes invisible. There is NO white cast after you rub it in. The initial white color makes it really easy to see where you have applied it. The lotion is very moisturizing but it's also fairly lightweight feeling, and isn't greasy. My skin is usually on the dry side. The smell is nice and neutral, some people might say that it has a bit of a "sunscreen" smell. But the smell is pretty faint and it doesn't linger. I find it to be pleasant, personally. Additionally, I have used this in the water and I find it to offer excellent water resistance even though it doesn't form a heavy-feeling layer on the skin. This is particularly impressive to me. This sunscreen will definitely be a go-to for beach days. It's great for face and body! The one caveat is that it tastes terrible if you get it in your mouth. So I definitely do not recommend eating it, lol. You might have this issue if you're particularly sweaty and the sweat drips down your face. In my experience many sunscreens do this, so I don't consider it to be a big deal. I'd recommend this for anyone looking for cost-effective and lightweight sun protection. It's great on face and body.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 19, 2021
A
Verified Purchase
Armando
Whiting, US
★★★★★ 5
Good product
It’s very comparable to the Neutrogena version. Its light on my face, does not leave a white cast, and doesn’t break me out. The price point is excellent compared to the name brand one. I go walking almost everyday and live in a sunny and hot area where the climate is hot all year round. I haven’t gotten burnt since wearing this sunscreen. Definitely recommend *UPDATE* This sunscreen gave me acne. I rarely breakout and I now have five pimples on my face. I do not recommend!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 14, 2024
M
Verified Purchase
mamacholina
Lowell, US
★★★★★ 3
Burns My Eyes
If your eyes have a sensitivity to sunscreen, they may have a sensitivity to this one. This product made my eyes burn for two days, with multiple washings. I have had problems with La Roche Posay sunscreen — if that is a helpful association. It has dimethicone —a silicone— in it (which might be the irritant). Its common in beauty products but some people avoid it for various reasons. If you have no sensitivities and don’t mind the silicone, then it could be an acceptable option for the value. It went on smooth and light, left no cast, and had a very mild scent. I will use it on my limbs, but I can’t use this on my face.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 15, 2023

recommand products