A good night’s sleep is important for your mind, body, and mood. Many people have trouble sleeping, but glycine is becoming a more popular option. Glycine is an amino acid that can help you relax and sleep better.
It covers their benefits, recommended dosages, and how they can help your sleep. If you want a natural way to sleep better, this guide will help you find the right product.
What is Glycine and How Does it Help with Sleep?
Glycine is an amino acid that helps your body in many ways. It works as a neurotransmitter in your brain and spinal cord, helping you relax and calm your nervous system. Glycine also helps build collagen and proteins; it has a calming effect on the brain.
Key Sleep Benefits of Glycine:
- Improved Sleep Quality: Glycine has been shown to promote deeper, more restorative sleep by lowering core body temperature and enhancing sleep efficiency.
- Faster Sleep Onset: Studies indicate that glycine supplementation can help people fall asleep faster and improve overall sleep latency.
- Enhanced REM Sleep: Glycine has been linked to improvements in REM (rapid eye movement) sleep, which is essential for memory consolidation and cognitive function.
- Reduced Sleep Disturbances: Glycine has anti-anxiety and relaxing properties that can help reduce nighttime disturbances, such as waking up feeling restless or tense.
Key Factors to Consider When Buying Glycine Supplements for Sleep
- Dosage
Most studies suggest taking 3 to 5 grams of glycine about 30 to 60 minutes before bed for the best results. Some supplements come in lower doses for beginners or those sensitive to glycine.
- Form of Glycine
Glycine supplements come in various forms:
- Powder: A flexible option that allows for easy dosing and quick absorption.
- Capsules/Tablets: Convenient and often easier to take, especially for those who prefer pills.
- Liquids: Provide quick absorption and can be mixed with water or other beverages.
- Purity and Additives
Choose pure glycine supplements without extra fillers or artificial ingredients. If possible, pick products that are non-GMO, gluten-free, or vegan for a cleaner option.
- Additional Ingredients
Some glycine supplements combine magnesium, melatonin, vitamin B6, or other sleep-supporting ingredients. These can enhance glycine’s calming effects, making them ideal for people who want a comprehensive sleep aid.
- Brand Reputation
Pick a brand that is open about its ingredients, uses third-party testing, and has good customer reviews. Certifications such as GMP or NSF indicate that the product meets quality standards.
7 Best Glycine Supplements for Sleep (2026 Updated)
Here are the top 7 glycine supplements for sleep in 2026, selected for their quality, effectiveness, and customer satisfaction.
| Product Name | Key Ingredients | Made In | Highlights | Form | Dose |
| Kaged Muscle Glycine | Glycine | USA | High quality, fast-absorbing | Powder | 5g |
| Bulk Natural Pure Glycine | Glycine | USA | Pure and clean, no fillers | Powder | 5g |
| Pure Encapsulations Glycine | Glycine | USA | Hypoallergenic, easy-to-absorb | Capsule | 3g |
| NOW Foods Glycine | Glycine | USA | Affordable, supports relaxation | Powder | 5g |
| Life Extension Glycine | Glycine | USA | Supports sleep and cognitive health | Capsule | 3g |
| Doctor’s Best Glycine | Glycine | USA | Good for promoting calmness | Capsule | 3g |
| Jarrow Formulas Glycine | Glycine | USA | Great value, enhances sleep quality | Capsule | 3g |
Detailed Product Reviews
Kaged Muscle Glycine
Why we like it: Kaged Muscle’s glycine powder is pure and absorbs quickly. Each serving has 5 grams of glycine, making it a good choice for strong sleep and relaxation support.
Tester Feedback: Users report better sleep quality and faster sleep onset after just a few nights of use.
Note: The powder form is highly absorbable, but it may not be as convenient for those who prefer capsules.
Bulk Natural Pure Glycine
Why we like it: Bulk’s glycine supplement is pure with no additives. It’s a simple and effective choice for better sleep without extra ingredients.
Tester Feedback: Customers love the affordable price and no-nonsense formula, with noticeable improvements in sleep duration and quality.
Note: The powder form can be mixed into drinks or smoothies, which is ideal for some users but not for everyone.
Pure Encapsulations Glycine
Why We Recommend It: Pure Encapsulations is a trusted brand known for producing hypoallergenic supplements. Their glycine is free from common allergens like gluten, making it a safe option for those with sensitivities.
Tester Feedback: Many users report a calming effect and feel more rested upon waking.
Keep in mind: Each capsule has 3 grams, so it’s a good pick if you want a smaller dose.
NOW Foods Glycine
Why We Recommend It: NOW Foods offers 5 grams of glycine per serving, a strong dose to promote relaxation and improve sleep quality. This product is great for those on a budget who still want effectiveness.
Tester Feedback: Users mention feeling relaxed before bedtime and experiencing less tossing and turning at night.
Keep in mind: It’s a good value, but the powder form may not suit those who like pills.
Life Extension Glycine
Why we like it: Life Extension’s glycine contains 3 grams per serving and includes additional nutrients to support sleep and mental function.
What users say: Many people sleep better and notice better memory in the morning.
Keep in mind: The capsules are easy to take, but you might need more than one to reach a higher dose.
Doctor’s Best Glycine
Why we like it: Doctor’s Best provides 3 grams of glycine per capsule, which supports calmness and relaxation.
What users say: People say it helps them fall asleep faster and wake up feeling refreshed.
Note: It’s an excellent entry-level supplement for sleep, but for stronger effects, you might prefer a higher dose.
Jarrow Formulas Glycine
Why we like it: Jarrow Formulas is a reliable brand with 3 grams of glycine per capsule. It’s a good choice for better sleep that won’t cost too much.
What users say: People feel more relaxed at night and have fewer sleep disruptions.
Keep in mind: This is good for general use, but may not be enough if you need a higher dose.
Conclusion:
When choosing glycine, key factors include dosage, form, and added benefits such as relaxation or cognitive support. If you’re looking for a high-dose option, Kaged Muscle Glycine and Bulk Natural Pure Glycine are top picks. For those who prefer capsules, Pure Encapsulations Glycine and Jarrow Formulas Glycine offer easy-to-take, hypoallergenic formulas. NOW Foods Glycine and Doctor’s Best Glycine are great choices for anyone on a budget who still wants quality sleep support.
Tips to get the most out of glycine for sleep:
- Take glycine 30 to 60 minutes before bed for the best results.
- Pair glycine with a regular sleep routine, like turning off screens before bed, for better results.
- Begin with a low dose and increase it as needed to find what works best for you.
FAQ: Common Questions About Glycine Supplements for Sleep
How does glycine help with sleep?
Glycine promotes relaxation by lowering body temperature and calming the nervous system, helping you fall asleep faster and enjoy deeper sleep.
What is the best dose of glycine for sleep?
Most studies recommend 3-5 grams of glycine taken 30-60 minutes before bed for optimal results.
Is glycine safe to take every night?
Yes, glycine is safe for long-term use when taken at the recommended dosage. Always follow the instructions on the label.
Can glycine improve sleep quality?
Yes, glycine has been shown to improve sleep quality by enhancing sleep onset, reducing disruptions, and increasing REM sleep.
Does glycine help with anxiety or stress before bed?
Yes, glycine has calming effects and may help reduce anxiety, making it easier to fall asleep without stress.
Can I take glycine with other sleep supplements?
Yes, glycine can be taken alongside other sleep aids, such as melatonin, magnesium, or L-theanine, to enhance its effects.
References
- PubMed – Glycine and Sleep
- National Institutes of Health (NIH) – Glycine
- Journal of Sleep Research – Glycine and Sleep.