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Glutamine vs Ashwagandha (KSM-66) — Which Should You Take?

Glutamine

amino acids

Typically £8–£25/month

Ashwagandha (KSM-66)

adaptogens

Typically £8–£25/month
Feature
Glutamine
Ashwagandha (KSM-66)
Typical Dosage
5-10g daily
300-600mg daily (KSM-66 extract)
Best Form
L-Glutamine Powder
KSM-66
Key Benefits
5 listed
5 listed
Evidence Rating
★★★★
★★★★
Best Time
Post-workout or before bed for recovery; between meals for gut health
Evening for sleep, or split morning/evening for stress
Upper Limit
40g daily (split doses)
1,200mg daily
Side Effects
3 noted
4 noted

Glutamine Benefits

Supports gut lining integrity and repair
Immune system fuel during stress and illness
Reduces muscle soreness after exercise
May support muscle recovery and reduce catabolism
Supports nitrogen balance in the body

Ashwagandha (KSM-66) Benefits

Reduces cortisol and perceived stress
Improves sleep quality
May increase testosterone in men
Anxiety reduction
Physical performance enhancement

Glutamine Side Effects

Generally well tolerated
Bloating at very high doses
Avoid with liver disease or Reye syndrome

Ashwagandha (KSM-66) Side Effects

Drowsiness (dose-dependent)
May worsen thyroid conditions (can increase thyroid hormones)
Mild digestive upset in some people
Not recommended during pregnancy

Can You Take Glutamine and Ashwagandha (KSM-66) Together?

In most cases, Glutamine and Ashwagandha (KSM-66) 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.

Glutamine: Lactulose (may reduce effectiveness)

Glutamine: Anti-seizure medications

Ashwagandha (KSM-66): Thyroid medications — may increase thyroid hormone levels

Ashwagandha (KSM-66): Sedatives — additive drowsiness

Which Should You Choose?

Choose Glutamine if your primary goal is: supports gut lining integrity and repair. Choose Ashwagandha (KSM-66) if your primary goal is: reduces cortisol and perceived stress.

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Frequently Asked Questions

Is Glutamine better than Ashwagandha (KSM-66)?

It depends on your goals. Glutamine and Ashwagandha (KSM-66) serve different purposes and are often taken together.

Can I take Glutamine and Ashwagandha (KSM-66) together?

In most cases, yes. Glutamine and Ashwagandha (KSM-66) 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 Glutamine?

Post-workout or before bed for recovery; between meals for gut health

What is the best time to take Ashwagandha (KSM-66)?

Evening for sleep, or split morning/evening for stress

What are the side effects of Glutamine?

Generally well tolerated. Bloating at very high doses. Avoid with liver disease or Reye syndrome.

What are the side effects of Ashwagandha (KSM-66)?

Drowsiness (dose-dependent). May worsen thyroid conditions (can increase thyroid hormones). Mild digestive upset in some people. Not recommended during pregnancy.

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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