Does L-Phenylalanine help with energy?
Possibly — but there are few reports. 75% of 8 people who reported on L-Phenylalanine for energy say it improved. 0% noticed no change and 25% say it got worse.
Energy: what users report
75%better8 reports · few reports
6 better0 no change2 worse
What people say about L-Phenylalanine and energy
“I take 500mg L-Phenylalanine when I first get up in the morning and it appears to work well. I used to be terrible at getting out of bed in the morning, and have seen a great improvement over the last ~3 months.”
“I find L-Tyrosine and L-Phenylalinine give me a daily boost of energy if I take them in the morning”
“I've been taking this in the morning, but it makes me incredibly sleepy.”
“I've been taken 2g l-phenylalanine...after upping to 2g, I've been on point! I managed a 11 hour stretch at the library”
What the research says
AResearch: Strong9 meta-analyses · 45 trials on PubMed
None of the top reviews we found look specifically at energy. See all research on L-Phenylalanine.
Side effects people mention
drowsiness 2anxiety 1depression 1
What else is L-Phenylalanine used for?
Based on few reports — treat as anecdotal. Information only — not medical advice. How we count