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Does L-Theanine Lower Cortisol?

Reviewed by: Dr. Mark Ghalili, DO

What is L-Theanine? 

L-theanine is a well-known natural amino acid. It’s most commonly used to enhance mental clarity and promote relaxation. You can usually find L-theanine in mushrooms andvarious tea products, including green, black, and oolong tea; it’s also available as a dietary supplement. Unlike other amino acids and substances that can improve your relaxation and mental clarity, L-theanine can do so without causing drowsiness. 

Does L-Theanine Lower Cortisol? Here’s What the Science Says 

If you’ve ever asked yourself “Does l-theanine lower cortisol?”, you’re in luck. Many medical studies have proven that taking l-theanine can lower your cortisol to a healthy level.This studydemonstrates that l-theanine not only helps to lower cortisol levels, but also can help to alleviate stress-related symptoms, including poor sleep, anxiety, and depression.

In fact, injust 30-60 minutes, L-theanine should begin taking effect in most people and should last for about 4-8 hours on average. Ideally, your cortisol levels should remain significantly lower for these 4-8 hours, making L-theanine an ideal solution for lowering cortisol levels. 

What is Cortisol? 

Cortisol is your body’s main stress hormone. It works in tandem with parts of your brain to control your mood, anxiety, and fear levels and motivation. It also has a handful of other key functions, per WebMD, including: 

  • Controls how your body utilizes proteins, carbohydrates, and fats 
  • Regulates your blood pressure 
  • Raises your blood sugar (and glucose levels) 
  • Regulates your sleep/wake cycle 

Understanding the Effects of L-Theanine 

L-theanine causes changes in the brain that may have many different physical and mental health benefits. For example, it aids in the balance of neurotransmitters like GABA and serotonin. 

These neurotransmitters can have significant effects on crucial components of your health and overall well-being, including your sleep schedule, level of alertness, mood, emotions, and much more. It also makes it easier for you to relax by increasing alpha brain waves. L-theanine can even be a reliablenatural anti-inflammatory for aches and pains. 

Other Benefits of L-Theanine 

L-theanine offers a large number of other great benefits. Extensive research has shown that L-theanine can: 

  • Improve your mood 
  • Improve your sleep 
  • Lower your stress/anxiety levels 
  • Improve your focus 
  • Enhance your cognitive performance


InstaZen® by Regen Labs: A Top L-Theanine Supplement to Improve Your Mood 

InstaZen® was created by a board-certified physician from Regen Labs. It was carefully developed to directly combat tension and stress, as well as lower cortisol levels, by targeting your brain’s GABA receptors. 


How InstaZen® Stands Out 

InstaZen® has a unique blend of ingredients to effectively improve your mood and reduce tension, compared to other supplements on the market. L-theanine can quickly lower your cortisol levels and significantly reduce stress, while Valerian Roots helps reduce anxiety and enhance sleep. 

DHH-B is great for potentially improving your mood, relieving pain, and reducing inflammation and anxiety levels. Safranal Extract can be incredibly useful for alleviating depressive symptoms and enhancing your overall mood. 

L-Theanine Benefits & Timing 

L-theanine has rapidly grown in popularity thanks to its vast array of proven physical and mental health benefits. Whether you’re hoping to take control of your cortisol levels and stress management, relaxation, or mental clarity, you can count on L-theanine to improve your overall health. Don’t catch yourself wondering “When does L-theanine lower cortisol the most effectively?”. Take it at the right time, and you’ll notice the difference almost immediately.

Are you ready to experience the full benefits of L-theanine and lower your cortisol levels in just a few minutes? Then don’t hesitate to orderInstaZen® by Regen Labs and give it a try for yourself. Our product makes it incredibly convenient to take L-theanine, lower your cortisol levels, and enjoy a much less stressful day. 

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