What is L-Phenylalanine?

Category: Supplements

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An essential amino acid produced by plants and microorganisms and obtained by animals through their diet. It is marketed as a nutritional supplement for its possible use as an analgesic (painkiller) and antidepressant.

Reported purpose & perceived effectiveness
Purpose Patients Evaluations Perceived Effectiveness
Brain fog 1 0
Depressed mood 1 0
Fatigue 1 0
Nerve pain (neuralgia) 1 2
Parkinson's disease 1 0
Restless legs at night 1 2

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

Side effects

Side effects as an overall problem

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

Commonly reported side effects and conditions associated with L-Phenylalanine

Side effect Patients

Why patients stopped taking L-Phenylalanine

Multiple reasons could be selected

Reason Patients
Did not seem to work 3
Course of treatment ended 1
Expense 1
Other 1
Side effects too severe 1
See all 4 patients who've stopped taking L-Phenylalanine

Duration

Stopped taking L-Phenylalanine

Duration Patients
Less than 1 month 2
1 - 6 months 1
1 - 2 years 1
Adherence
Adherence Evaluations
Always 4
Usually 0
Sometimes 0
Never taken as prescribed 0
Burden
Burden Evaluations
Very hard to take 0
Somewhat hard to take 0
A little hard to take 0
Not at all hard to take 4
Cost per month
Cost per month Evaluations
$200+ 0
$100-199 0
$50-99 0
$25-49 2
< $25 0
Not specified 2
Last updated:
There are no evaluations for L-Phenylalanine.