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Description
Pure Glycine - 1000 mg, 120 capsulesGlycine is an amino acid that supports the central nervous system and sleep quality. It is considered a conditionally essential amino acidthis means our bodies produce glycine, but often not enough to meet our needs. Glycine is an important precursor for many critical molecules, including glutathione, the bodys master antioxidant. Glycine can help support: Improved sleep quality and duration* Healthy neurological function* Healthy aging and
Glycine is an amino acid that supports the central nervous system and sleep quality. It is considered a conditionally essential amino acid–this means our bodies produce glycine, but often not enough to meet our needs. Glycine is an important precursor for many critical molecules, including glutathione, the body’s master antioxidant. Glycine can help support:
- Improved sleep quality and duration*
- Healthy neurological function*
- Healthy aging and glutathione production*
Clinical studies involving glycine supplementation have reported improvements in sleep quality and feelings of next day energy and mental clarity.*
Supports neurological health. Age-related declines in memory and learning have been associated with changes in the NMDA receptor system. NMDA receptors are a group of ion channels that support memory and synaptic plasticity. Glycine may help support biochemical pathways related to the NMDA receptor system.*
Supports healthy aging and glutathione production. Increased oxidative stress is a hallmark of aging. As we age, glutathione (our body’s master antioxidant) decreases over time. Glycine, as a building block of glutathione, can help optimize glutathione production. A clinical study involving supplementation with glycine and N-acetyl cysteine (another glutathione precursor) observed improvements in glutathione levels and several aging hallmarks.*
Preclinical evidence suggests that glycine may also act as an autophagy activator and help clear methionine from the body, two important roles in supporting longevity.*
References:
Aguayo-Cerón KA et al. Int J Mol Sci. 2023;24(14):11236.
Inagawa K et al. Sleep Biol Rhythms. 2006;4(1):75-77
Johnson AA, Cuellar TL. Ageing Res Rev. 2023;87:101922.
Kumar H et al. Biomed Pharmacother Biomedecine Pharmacother. 2023;165:115022.
Razak MA et al. Oxid Med Cell Longev. 2017;2017:1-8.
Yamadera et al. Sleep Biol Rhythms. 2007;5(2):126-131
- Helps lower nighttime core body temperature to support sleep quality*
- Acts as a neurotransmitter in the central nervous system, potentially supporting neurological function and sleep health*
- Supports methionine clearance for healthy aging*
- May help support synaptic plasticity and biochemical pathways related to healthy aging and memory function*
- Glycine is a building block for glutathione, the body’s master free radical scavenger*
| Supplement Facts | ||
|---|---|---|
| Serving Size: 1 Capsule |
||
| Servings Per Container: 120 |
||
| Amount Per Serving | %DV | |
| Glycine | 1000 mg | † |
| † Daily Value (DV) not established | ||
REV.04.24
- OTHER INGREDIENTS: Vegetable capsule, rice flour.
- DOES NOT CONTAIN: Dairy, egg, soy, wheat, gluten, fish, shellfish, tree nuts, peanuts, sesame.
- SUGGESTED DAILY USE: Take one (1) capsule, 1 to 3 times daily, or as directed by your healthcare professional.
-
NOTE: Store in a cool, dry place, away from direct sunlight. Do not use if tamper evident seal is broken or missing. KEEP OUT OF REACH OF CHILDREN.
-
CAUTION: Not intended for use if you are pregnant or nursing. Not formulated for use in children. If you have a medical condition or are taking medications, consult with your healthcare professional before using this product.
- Science-First Formulations: We source only the highest quality ingredients backed by validated research to help you achieve your longevity goals.
- Quality Manufacturing Practices. All of our products are manufactured in a FDA-registered, GMP-certified facility.
- Third-Party Tested in the USA. Every batch is third-party tested in US laboratories to ensure the highest quality, purity and potency. Certificates of Analysis are available.
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Product Reviews
★★★★★ 5
Very good quality for a reasonable price.
Size: 10, Color: Grey
Very good quality, very soft, very comfortable, look amazing, I’m very happy.
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Reviewed in the United States on May 23, 2026
★★★★★ 4
Comfortable fit for slip-in fabric shoes
Size: 14, Color: Black/Black
My first experience with Marc Joseph. I typically purchase dress and casual work shoes from Florsheim and occasionally Rockport. I'm giving these four stars because the initial fit and feel appear solid. Depending on the shoe brand I wear a size 14 or 15. My feet are slightly wide but I don't alway need wide fit. These size 14 fit well with wide enough toe box. I've tried slip in shoes before and they just don't feel right. These somehow work and there is no heel slip. My only reservation is the high lip on the heel for slip-in and hope they dont catch pant hems. I gave 4 stars because I'll have to determine durability. Granted they are a light fabric shoe with a soft rubber tread. I'd like them to last for at least 6 months..and use them for business casual work wear during warm weather.
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Reviewed in the United States on May 19, 2026
★★★★★ 5
Stylish and comfortable.
Size: 8 Wide, Color: Black/Black
Shoes look great and fits well. Definitely recommend pocking another pair.
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Reviewed in the United States on May 10, 2026
★★★★★ 3
Narrow for an 11.5W
Size: 11.5 Wide, Color: Navy
Nice look and material but very narrow for a wide, had to return
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Reviewed in the United States on February 25, 2026
★★★★★ 5
NIce Shoes
Size: 10, Color: Black
Very nice quality and comfort
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Reviewed in the United States on June 1, 2026