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What is L-Theanine?

Category: Supplements

Most popular types: Powder City L-Theanine

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See also: 5-hydroxytryptophan and L-Theanine Amino acid complex Amino acids Endo Plus

Theanine is an amino acid commonly found in tea. L-theanine may help the body's immune response to infection by boosting the disease-fighting capacity of gamma delta T cells.

See patients taking L-Theanine

Reported purpose & perceived effectiveness
Purpose Patients Evaluations Perceived Effectiveness
Anxious mood 28 17
Generalized anxiety disorder 12 7
Insomnia 11 5
Amyotrophic lateral sclerosis 4 3
Promote relaxation 3 1

Show all 37 reasons taken

  • Major
  • Moderate
  • Slight
  • None
  • Can't tell
See all 154 patients that have taken L-Theanine

Side effects

Side effects as an overall problem

Side effects as an overall problem
Severity Evaluations Percentage
Severe 1
Moderate 0
Mild 4
None 28

Commonly reported side effects and conditions associated with L-Theanine

Side effect Patients Percentage
Headaches 2
Dehydration 1

Why patients stopped taking L-Theanine

Multiple reasons could be selected

Reason Patients Percentage
Did not seem to work 12
Expense 7
Other 6
Course of treatment ended 3
Side effects too severe 2
Doctor's advice 1
See all 23 patients who've stopped taking L-Theanine

Duration

Stopped taking L-Theanine

Duration Patients Percentage
Less than 1 month 3
1 - 6 months 12
6 months - 1 year 2
1 - 2 years 3
2 - 5 years 3
5 - 10 years 1
Adherence
Adherence Evaluations Percentage
Always 18
Usually 8
Sometimes 2
Never taken as prescribed 5
Burden
Burden Evaluations Percentage
Very hard to take 0
Somewhat hard to take 3
A little hard to take 2
Not at all hard to take 28
Cost per month
Cost per month Evaluations Percentage
$200+ 0
$100-199 0
$50-99 1
$25-49 1
< $25 13
Not specified 18
Last updated:

2 patient evaluations for L-Theanine

Sort by: Most recent

Jul 7, 2017 (Started May 15, 2016)

  • Effectiveness
    Can't tell (for amyotrophic lateral sclerosis)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: 100 mg Twice daily
Advice & Tips: Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Phasellus faucibus turpis sed mi maximus mattis.
Cost: < $25 monthly

Oct 5, 2016 (Started May 15, 2016)

  • Effectiveness
    Can't tell (for amyotrophic lateral sclerosis)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: 100 mg Twice daily
Cost: < $25 monthly
  • 0 helpful marks

Oct 20, 2009 (Started Apr 09, 2009)

  • Effectiveness
    Can't tell (for Other)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: 100 mg Daily
  • 0 helpful marks
Last updated:
Showing 2 of 2 patient evaluations for L-Theanine