L-Lysine 500 mg
by Mason Natural · tablet or pill · 100 tablets
- On the market (NIH)
- UPC 3 11845 07211 5
- DSLD label 318765
- Serving 1 tablet
- 100 servings
L-Lysine 500 mg by Mason Natural lists 2 ingredients, 2 with an amount per serving of 1 tablet, such as 72 mg of calcium and 500 mg of L-lysine. Its current label entered the NIH Dietary Supplement Label Database on September 25, 2024.
What is in L-Lysine 500 mg?
Each row as the label prints it, per serving of 1 tablet. 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 |
|---|---|---|---|
| Calciumas Dicalcium Phosphate | 72 mg | 6% | 65% of 17,831 products listing calcium give more (median 115 mg). |
| L-Lysineas L-Lysine Hydrochloride | 500 mg | 40% of 1,250 products listing lysine give more (median 500 mg). |
Source: NIH ODS Dietary Supplement Label Database, label 318765 (entered September 25, 2024), version 9.4.0. See the label on DSLD or its label image (PDF). 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?
4 products list the very same ingredients; the nearest amounts come first.
- Natural L-Lysine 500 mgRugby same ingredients
- L-Lysine 500 mgMajor same ingredients
- L-Lysine 500 mgWonder Laboratories same ingredients
- L-Lysine 600 mg21st Century same ingredients
- Maximum Strength L-Lysine Viraguard 1000 mgVitamin World · off the market 1 shared, 70% alike
- L-Lysine 1000GNC · off the market 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: Adults - Take one tablet daily, preferably with food, as a dietary supplement.
- Warnings
- Caution: If you are pregnant, nursing, taking any medications or have any medical condition, consult your physician before use.
- Discontinue use and consult your physician if any adverse reactions occur.
- Keep out of reach of children.
- Tamper-Evident Seal: Do not use product if seal appears tampered with.
- Allergens and what it does not contain
- Guaranteed no added: Sugar, starch, wheat, corn, fish, shellfish, peanuts, tree nuts, soy, yeast, artificial flavors and colors, dairy, gluten, egg, fragrance, preservatives. Sodium free.
- Gluten free Soy free
- Storage
- Store in a dry place under controlled room temperature: 20 degrees - 25 degrees C (68 degrees - 77 degrees F).
Source: label statements in DSLD label 318765.
What else is on the label?
Other ingredients: Microcrystalline Cellulose, Stearic Acid, Croscarmellose Sodium, Magnesium Stearate, Silicon Dioxide.
Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Mason Guarantee Laboratory Tested cGMP Certified Good Manufacturing Practice Certified.
How many labels does L-Lysine 500 mg have?
2 labels are on file under this name since September 22, 2022: other sizes, label designs and reformulations. The current one leads this page.
- Label 318765 (current) Entered September 25, 2024 · on the market · 100 tablets · UPC 3 11845 07211 5
- Label 276920 Entered September 22, 2022 · off the market December 29, 2023 · 100 tablets
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Mason Vitamins, Inc. (distributor), Miami Lakes, FL. All Mason Natural products.