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Glycine vs Creatine Monohydrate — Which Should You Take?

Glycine

amino acids

Typically £8–£25/month

Creatine Monohydrate

amino acids

Typically £8–£25/month
Feature
Glycine
Creatine Monohydrate
Typical Dosage
3-5g daily
3-5g daily (no loading needed)
Best Form
Powder
Creatine Monohydrate
Key Benefits
6 listed
5 listed
Evidence Rating
★★★★
★★★★★
Best Time
Evening for sleep benefits; anytime for general health
Any time — consistency matters more than timing
Upper Limit
10g daily
10g daily
Side Effects
3 noted
3 noted

Glycine Benefits

Improves sleep quality and sleep onset
Supports collagen formation and joint health
Enhances cognitive function and memory
Reduces muscle wasting and supports muscle recovery
Promotes relaxation and reduces anxiety
Supports immune function

Creatine Monohydrate Benefits

Increased strength and power output
Faster muscle recovery
Increased lean muscle mass
Cognitive performance (especially under stress/sleep deprivation)
May protect brain health

Glycine Side Effects

Mild gastrointestinal upset at high doses
Drowsiness (particularly at evening dosing)
Fatigue in some individuals

Creatine Monohydrate Side Effects

Water retention (1-2kg, not fat)
Rare: digestive discomfort if taken without water
Does NOT cause kidney damage in healthy individuals (proven safe in 500+ studies)

Can You Take Glycine and Creatine Monohydrate Together?

In most cases, Glycine and Creatine Monohydrate can be taken together safely. However, always check the interactions section of each supplement and consult a healthcare professional if you take medication or have existing health conditions.

Glycine: May potentiate sedative effects with benzodiazepines or sleep medications

Glycine: Possible interaction with antipsychotic medications

Creatine Monohydrate: NSAIDs may increase kidney stress when combined (theoretical)

Creatine Monohydrate: Caffeine may slightly reduce creatine uptake (debated)

Which Should You Choose?

Choose Glycine if your primary goal is: improves sleep quality and sleep onset. Choose Creatine Monohydrate if your primary goal is: increased strength and power output.

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Frequently Asked Questions

Is Glycine better than Creatine Monohydrate?

It depends on your goals. Glycine and Creatine Monohydrate serve different purposes and are often taken together.

Can I take Glycine and Creatine Monohydrate together?

In most cases, yes. Glycine and Creatine Monohydrate can be taken together safely. However, always check for specific interactions and consult a healthcare professional if you take medication.

What is the best time to take Glycine?

Evening for sleep benefits; anytime for general health

What is the best time to take Creatine Monohydrate?

Any time — consistency matters more than timing

What are the side effects of Glycine?

Mild gastrointestinal upset at high doses. Drowsiness (particularly at evening dosing). Fatigue in some individuals.

What are the side effects of Creatine Monohydrate?

Water retention (1-2kg, not fat). Rare: digestive discomfort if taken without water. Does NOT cause kidney damage in healthy individuals (proven safe in 500+ studies).

How We Compare Supplements

This comparison is based on published clinical research, peer-reviewed studies from PubMed, and established nutritional science. We evaluate dosages based on clinically-effective amounts, not manufacturer recommendations. Benefits listed have at least moderate evidence from human studies. When evidence is limited or conflicting, we note this.

Disclaimer: This comparison is for educational purposes only and is not medical advice. Always consult a qualified healthcare professional before starting any supplement, especially if you take medication or have existing health conditions.

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