L-Phenylalanine
by Metabolic Maintenance · capsule · 60 capsules
- On the market (NIH)
- UPC 8 38287 00144 7
- DSLD label 24912
- Serving 1 to 2 capsules; amounts per 1 capsule
L-Phenylalanine by Metabolic Maintenance lists 2 ingredients, 2 with an amount per serving of 1 capsule, such as 10 mg of vitamin B6 and 500 mg of L-phenylalanine. Its current label entered the NIH Dietary Supplement Label Database on August 23, 2013.
What is in L-Phenylalanine?
Each row as the label prints it, per serving of 1 capsule. The capsule beside an amount places it among every product in the NIH database that lists the same ingredient: the bar is the middle half of their amounts, the line in it the median, the whiskers the 10th and 90th percentiles; the green tick is the FDA Daily Value and the red dashed tick the adult upper limit (IOM).
| Ingredient | Amount | % DV | Among products listing it |
|---|---|---|---|
| Vitamin B6as Pyridoxine HydrochlorideVitamin B-6 (Form: as Pyridoxine HCl) | 10 mg | 500% | Higher than 55% of 15,277 products listing vitamin B6 (median 6 mg). |
| L-Phenylalanine | 500 mg | Higher than 65% of 611 products listing phenylalanine (median 250 mg). |
Source: NIH ODS Dietary Supplement Label Database, label 24912 (entered August 23, 2013), version 9.4.0. See the label on DSLD. Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.
Is that a lot?
Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient.
The NIH database records one serving a day from the label's directions; its % Daily Values are for adults and children 4 or more years of age. The directions as printed are further down this page.
The Tolerable Upper Intake Level is the most of a nutrient per day, from food, water and supplements together, that is likely to pose no risk for almost all adults (Institute of Medicine, 2011). It does not apply under medical supervision. This page compares labels; it is not medical advice.
Sources: amounts from the DSLD label; Daily Values from 21 CFR 101.9(c)(8)(iv); adult upper limits from the Institute of Medicine's DRI summary tables (2011). How positions are computed.
Which products have the closest formulas?
3 products list the very same ingredients; the nearest amounts come first.
- L-Phenylalanine Caps 500 mgCountry Life same ingredients
- L-Phenylalanine 500 mgMetabolic Maintenance same ingredients
- DLPA 1,000 mgAN Amazing Nutrition Amazing Formulas same ingredients
- L-Phenylalanine 500 mgVitamin World 1 shared, 70% alike
- L-PhenylalaninePureBulk.com 1 shared, 70% alike
- Pure L-Phenylalanine Free Form Amino PowderHARD RHINO 1 shared, 70% alike
Source: ingredient lists of every product's current label in DSLD (version 9.4.0); similarity weights each shared ingredient by how rare it is.
What does the label say about taking it?
Quoted from the label as DSLD transcribed it: the maker's words, including any claim about what the product does, which the FDA has not evaluated and PlainVitamins does not endorse.
- Directions
- DIRECTIONS: One to two (1-2) capsules daily as a dietary supplement, or as directed by a Doctor. Best taken between meals.
- Warnings
- KEEP OUT OF THE REACH OF CHILDREN.
- CAUTION: Phenylketonurics - contains phenylalanine.
- Do not take with MAO inhibitors or tricyclic antidepressants. Hypertensives, pregnant or lactating women, consult your healthcare professional before taking this product.
- Allergens and what it does not contain
- Excipient-free.
- Each preservative-free vegetarian capsule contains only the active ingredients listed on the label.
- Storage
- STORAGE: Keep tightly closed in a dry place; do not expose to excessive heat.
Source: label statements in DSLD label 24912.
What else is on the label?
Other ingredients: vegetarian capsule, L-Leucine.
How many labels does L-Phenylalanine have?
One label is on file, entered on August 23, 2013.
- Label 24912 (current) Entered August 23, 2013 · on the market · 60 capsules · UPC 8 38287 00144 7
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Metabolic Maintenance Products (manufacturer), Sisters, Oregon. All Metabolic Maintenance products.