Dr. Becky Maes - Is It Bad For You? Approved by Dr. Becky Maes

Is Suntheanine Bad For You?



Short answer

No, Suntheanine is not bad for the human body. This patented substance shares the same benefits with its base compound L-theanine (theanine), but at a higher price. This refined form is said to be far more effective. The additional substances that may be present in a Suntheanine tablet are inactive and benign, especially in the amounts that may be present.



Recommended Alternative

Long answer

Much like L-theanine, Suntheanine promotes alpha brain waves that are known to induce a state of mind that is both relaxed and alert at the same time. This new form of an age-old tea extract may be used as part of a supplemental vitamin regiment. However, users can expect some uncomfortable side effects when used in larger than recommended doses, and may include headaches and dizziness.

The active ingredient in Suntheanine is believed to release large quantities of dopamine, in turn helping the brain halt the onset of a cerebrovascular accident, or commonly referred to as, a stroke. However, there is no definitive proof to authenticate this theory. Suntheanine is not limited only to stroke prevention, but also positively impacts areas of the brain that are responsible for mood, focus, and nervousness. This L- theanine derivative is also attributed to immune wellness and the manufacturer claims that it will ease the adverse symptoms associated with pre-menstrual syndrome (PMS) in females.  

Since the active ingredient in Suntheanine is L-theanine, it is important to point out that patients that are treated with sedative medicines should consult with their physicians before deciding to use this product. L-theanine is considered to be a relaxant supplement, and therefore may induce deeper sedation in individuals using sedatives and hypnotic drugs. Additionally, pregnant women should always consult their doctors prior to considering any supplement.  


Possible short-term side effects

  • headaches
  • dizziness
  • gastrointestinal problems

Ingredients to be aware of

  • natural fruit flavors
  • organic cane sugar
  • silica
  • stearic acid
  • xylitol


  • stress reliever
  • blood pressure control
  • immune health
  • sleep/wake health
  • mood stabilization
  • nervous tension relief
  • mental focus
  • pms relief

Healthier alternatives

  • naturally occurring l-theanine

Our Wellness Pick (what is this?)

Jarrow Theanine 200mg

  • Promotes relaxation
  • Extra strength formula
  • Veggie capsules
  • 60-day supply
Learn More!

Thank you for your feedback!

Written by DeeAnne Oldham
Published on: 04-11-2016
Last updated: 12-15-2023

Thank you for your feedback!

Written by DeeAnne Oldham
Published on: 04-11-2016
Last updated: 12-15-2023

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