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.

Reported purpose & perceived effectiveness
Purpose Patients Evaluations Perceived Effectiveness
Anxious mood 22 15
Generalized anxiety disorder 10 6
Insomnia 6 3
Amyotrophic lateral sclerosis 4 3
Difficulty staying asleep 2 0

Show all 29 reasons taken


  • Major
  • Moderate
  • Slight
  • None
  • Can't tell

Side effects

Side effects as an overall problem

Side effects as an overall problem
Severity Evaluations Percentage
Severe 1
Moderate 0
Mild 3
None 27

Commonly reported side effects and conditions associated with L-Theanine

Side effect Patients Percentage
Headaches 1

Dosages

Based on patients currently taking L-Theanine

Dosage Patients Percentage
100 mg daily 3
100 mg twice daily 1
200 mg daily 1
132 mg twice daily 1
300 mg daily 1
750 mg daily 1
200mg as needed 1
2400mg as needed 1
50mg as needed 1

Why patients stopped taking L-Theanine

Multiple reasons could be selected

Reason Patients Percentage
Did not seem to work 11
Expense 7
Other 6
Course of treatment ended 3
Doctor's advice 1
Side effects too severe 1
See all 22 patients who've stopped taking L-Theanine

Duration

Currently taking L-Theanine

Duration Patients Percentage
1 - 6 months 3
6 months - 1 year 1
1 - 2 years 1
2 - 5 years 4
5 - 10 years 1
10 years or more 1

Stopped taking L-Theanine

Duration Patients Percentage
Less than 1 month 2
1 - 6 months 12
6 months - 1 year 2
1 - 2 years 3
2 - 5 years 3
Adherence
Adherence Evaluations Percentage
Always 17
Usually 8
Sometimes 2
Never taken as prescribed 4
Burden
Burden Evaluations Percentage
Very hard to take 0
Somewhat hard to take 2
A little hard to take 2
Not at all hard to take 27
Cost per month
Cost per month Evaluations Percentage
$200+ 0
$100-199 0
$50-99 1
$25-49 1
< $25 12
Not specified 17
Last updated:

2 patient evaluations for L-Theanine

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: An amino acid that boosts levels of GABA, produces dopamine (a brain chemical involved in many different functions including movement) and serotonin that promotes an alpha state. Also reduces high blood pressure
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