Does phenylalanine work?

Overall Effectiveness Rating for Phenylalanine

The overall effectiveness rating for phenylalanine is 1.7 out of 3. This rating means there is some evidence that using phenylalanine may lead to positive results. This rating also means that some evidence does not back up all claims. Below you can find individual ratings for specific claims.

Overall Confidence Rating for Phenylalanine

There are 2 studies in the database on phenylalanine; the confidence rating is 20. A score above 80 means the effectiveness rating for this supplement is reliable. A score under 80 means there is insufficient evidence to ensure a reliable effectiveness rating. Note, this rating is for phenylalanine as a whole. There are also individual ratings for the claims below.

Products Containing Phenylalanine

Products Containing Phenylalanine
Essential AmiN.O. Energy
Intra Blast
Full list of all 32 products containing Phenylalanine.

Individual Claims

The overall ratings above do no necessarily reflect each claim about phenylalanine. Individual claims can have higher or lower ratings. For example, some supplements may have a lot of backing for one claim, but be completely useless for another. Click on claims below for more information.

Body Composition (weight, muscle, body fat) Claims Effectiveness Rating Confidence Rating
increase fat burning

Energy Balance (calories in & calories out) Claims Effectiveness Rating Confidence Rating
decrease calorie intake

Mental Health Claims Effectiveness Rating Confidence Rating
improve mood


Title of Study
Phenylalanine and aspartame fail to alter feeding behavior, mood and arousal in men
The effects of phenylalanine on exercise-induced fat oxidation: a preliminary, double-blind, placebo-controlled, crossover trial