Natural L-Lysine 500 mg
by Rugby · tablet or pill · 100 tablets
- On the market (NIH)
- UPC 0 05366 73101 8
- DSLD label 200945
- Serving 1 tablet
Natural L-Lysine 500 mg by Rugby lists 2 ingredients, 2 with an amount per serving of 1 tablet, such as 60 mg of calcium and 500 mg of L-lysine hydrochloride. Its current label entered the NIH Dietary Supplement Label Database on April 25, 2019.
What is in Natural 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 PhosphateCalcium (Form: as Dicalcium Phosphate) | 60 mg | 6% | 68% of 17,831 products listing calcium give more (median 115 mg). |
| 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 200945 (entered April 25, 2019), 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?
4 products list the very same ingredients; the nearest amounts come first.
- L-Lysine 500 mgMajor same ingredients
- L-Lysine 500 mgMason Natural 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.
- Warnings
- Tamper resistant - Do not use if imprinted safety seal under cap is broken or missing
- Keep out of reach of children
- Allergens and what it does not contain
- Free of: Sugar, starch, sodium, soy, preservatives, yeast, gluten, animal by-products, artificial colors-flavors.
- Storage
- To preserve quality and freshness, keep bottle tightly closed. Store between 15(0)-30(0)C (59(0)-86(0)F).
Source: label statements in DSLD label 200945.
What else is on the label?
Other ingredients: Microcrystalline Cellulose, Stearic Acid, Vegetable Magnesium Stearate, Croscarmellose Sodium, Silicon Dioxide, Pharmaceutical Glaze.
How many labels does Natural L-Lysine 500 mg have?
2 labels are on file under this name since December 24, 2013: other sizes, label designs and reformulations. The current one leads this page.
- Label 200945 (current) Entered April 25, 2019 · on the market · 100 tablets · UPC 0 05366 73101 8
- Label 28387 Entered December 24, 2013 · off the market August 27, 2018 · 100 tablets · UPC 0 0536-6731-01 8
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Rugby Laboratories (distributor), Livonia, MI. All Rugby products.