My evenings have completely changed
I used to be useless after 7pm. Now I have energy into the evenings and actually enjoy time with my family rather than just surviving until bedtime. Stack has genuinely changed my quality of life.
Nour M.
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Amino Acid850mg
Glycine
SLEEP, COLLAGEN & CALM
Dairy freeGluten freeSoy freeGMO free
$16.99/mo
30-day supply
Key Benefits
1
Supports restful sleep quality
2
Promotes collagen synthesis for skin and joints
3
Supports nervous system calming
4
Aids in detoxification and glutathione production
Wellness Goals
Recommended Dose
850mg
Take one 1,000mg capsule daily. For sleep support, take 30-60 minutes before bedtime. For collagen and general health benefits, timing is less critical — with a meal is fine. Glycine has a mildly sweet taste and is well-tolerated.
Get your personalized dose⚗️
3rd Party Tested
🩺
Doctor Formulated
🛡️
cGMP Certified
The Details
Why you'll love it
Glycine is proof that simple molecules can do extraordinary things. This tiny amino acid — the smallest of the 20 — plays an outsized role in sleep, beauty, and detoxification.
Let's start with sleep. Research shows that glycine taken before bed lowers core body temperature and promotes faster sleep onset. A landmark Japanese study found that 3g of glycine before bed significantly improved subjective sleep quality, reduced daytime sleepiness, and improved cognitive performance the next day. Unlike melatonin, glycine doesn't make you groggy — it works by helping your body temperature drop naturally, which is the physiological trigger for sleep.
Glycine is also essential for collagen production. It makes up roughly one-third of all collagen in your body, so adequate glycine intake directly supports skin elasticity, joint health, and connective tissue repair. And it doesn't stop there — glycine is a precursor to glutathione (your master antioxidant) and supports a calm nervous system by acting as an inhibitory neurotransmitter in the brainstem.
Research
Clinical Evidence
Key studies supporting Glycine, from peer-reviewed journals.
1
Glycine + NAC reverses age-related oxidative stress and inflammation
Supplementing glycine and N-acetylcysteine (GlyNAC) in older adults improves glutathione deficiency, oxidative stress, mitochondrial dysfunction, inflammation, and aging hallmarks — 2023
3
Glycine reduces fatigue and sharpens thinking after poor sleep
The effects of glycine on subjective daytime performance in partially sleep-restricted healthy volunteers — 2012
Study titles are simplified for readability. Provided for informational purposes — not medical advice.
Transparency
What's Inside
Third-Party Tested
Every batch is independently tested by ISO-17025 accredited labs for purity, potency, and contaminants.
Doctor Formulated
Designed by healthcare professionals using evidence-based research and clinical expertise.
cGMP Certified
Manufactured in cGMP & UL certified, FDA-registered facilities with a flawless inspection record.
As with any natural health product, consult your healthcare practitioner. Store in a cool, dry place. Keep out of reach of children. Discontinue use immediately if you experience an adverse event.
What people say
changed my whole routine tbh
used to take like 5 different supplements every morning and always forgot at least two of them. now i take one stack pack and that's it. so much simpler. and the results are actually better. wild.
Hazel B.
The value proposition is actually excellent
I calculated what I was spending on separate supplements, gym supplements, and energy drinks before Stack.
Tim A.
Simple, smart, and it actually works
The packaging is some of the nicest I've seen in wellness. But beyond aesthetics, the product delivers. My energy throughout the day is more stable and I'm recovering faster from workouts. I was genuinely skeptical.
Ashley N.
The inflammation reduction has been significant
I suffer from low-grade chronic inflammation and it affects everything - energy, mood, joint comfort. Stack's personalized formula has noticeably reduced these symptoms over three months. The targeted approach is clearly more effective than generic options.
Eric T.
My husband noticed before I did
About six weeks in my husband said I seemed more like myself - more energy in the evenings, less irritable, sleeping better. I hadn't even consciously registered how much had changed until he said it.
Amara S.
Personalized for you
Not sure if Glycine is right for you?
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