“Phenylalanine?”Here!
Hasn’t appeared in a scanned product yet.
As a supplement
Talk to your doctor or pharmacist.
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An amino acid the body uses to build proteins and, in its L-form, to make tyrosine and downstream neurotransmitters like dopamine and norepinephrine. It occurs naturally in protein-rich foods and is sold in supplement form as L-phenylalanine or DL-phenylalanine.
Why it’s used
Taken by some for mood support or as a building block for neurotransmitter production; DL-phenylalanine has also been explored for pain-related uses.
What the evidence says
Phenylalanine is a well-characterized essential amino acid nutritionally, but clinical evidence for supplemental phenylalanine improving mood or pain is limited and inconsistent, consisting mostly of small or older trials rather than robust modern trials.
Context
Studies of DL-phenylalanine for mood or pain have used varying doses and short durations, and results have not been consistently replicated.
Rumors
DL-phenylalanine improves focus, concentration and mental energy.
We haven’t found evidence strong enough to support this or rule it out.
What was measured is not yet noted.
Who’s saying this
- Nootropics Depot — a brand: sells supplements
How we know who this is
- “Nootropics Depot is located in Tempe Arizona.” (their page)
- “While we started our journey with nootropics, we now sell many different supplements for all sorts of goals.” (their page)
- Nootropics Depot — a brand: sells supplements
Phenylalanine supplements (L-phenylalanine and DLPA) boost mood and relieve depression.
We haven’t found evidence strong enough to support this or rule it out.
What was measured is not yet noted.
Who’s saying this
- iherb.com — we couldn’t open the site to see who runs it
DL-phenylalanine relieves chronic pain by boosting the body's natural endorphins.
We haven’t found evidence strong enough to support this or rule it out.
What was measured is not yet noted.
Who’s saying this
- community.bulksupplements.com — the site doesn’t say who runs it
Taking L-phenylalanine orally restores skin pigmentation in vitiligo.
Not gradedhealth and safety evidence
Sources cited — no verdict reached.
What was measured is not yet noted.
- Oral and topical L-phenylalanine, clobetasol propionate, and UVA/sunlight--a new study for the treatment of vitiligo (Peer-reviewed) · Funding not checked
Who’s saying this
- community.bulksupplements.com — the site doesn’t say who runs it
L-phenylalanine supplements raise blood pressure.
Not gradedhealth and safety evidence
Sources cited — no verdict reached.
What was measured is not yet noted.
- Dietary amino acid intake and the risk of hypertension: a systematic review and meta-analysis (Peer-reviewed) · Funding not checked · No conflicts declared
Who’s saying this
- community.bulksupplements.com — the site doesn’t say who runs it