R
by Syntrax · capsule · 90 capsules
- On the market (NIH)
- DSLD label 34788
- Serving 1 capsule
- 90 servings
R by Syntrax lists 2 ingredients, 2 with an amount per serving of 1 capsule, such as 100 mg of isolyn(TM) and 500 mcg of D-biotin. Its current label entered the NIH Dietary Supplement Label Database on June 25, 2014.
What is in R?
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 |
|---|---|---|---|
| Isolyn(TM)as R-Isomer {alpha} Lipoic Acid | 100 mg | Higher than 56% of 2,407 products listing alpha lipoic acid (median 50 mg). Per day at the most servings: 300 mg. | |
| D-Biotin | 500 mcg | 1,667%* | Higher than 79% of 9,447 products listing biotin (median 200 mcg). Per day at the most servings: 1,500 mcg. |
* % Daily Value computed from the printed amount and the FDA Daily Value (21 CFR 101.9); the label prints none for that row.
Source: NIH ODS Dietary Supplement Label Database, label 34788 (entered June 25, 2014), 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 3 servings 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?
6 products list the very same ingredients; the nearest amounts come first.
- Alpha Lipoic Acid 100 mgJarrow Formulas · off the market same ingredients
- Alpha Lipoic Acid 100 mg with BiotinJarrow Formulas · off the market same ingredients
- Alpha Lipoic Acid 200 mgtnvitamins same ingredients
- Alpha Lipoic Acid Plus Biotin 200 mgRite Aid same ingredients
- Alpha Lipoic Acid 200 mg plus Biotin OptimizerNature's Truth same ingredients
- Best Stabilized R-Lipoic Acid 100 mgDoctor's Best · off the market same ingredients
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
- RECOMMENDATIONS: As a dietary supplement, take 1 capsule three times daily with meals.
- Warnings
- Use only under the advice of your physician if you are pregnant or nursing a baby, taking prescription medication or have a medical condition.
- Keep out of the reach of children.
Source: label statements in DSLD label 34788.
What else is on the label?
Other ingredients: Microcrystalline Cellulose, Kosher Gelatin, Titanium Dioxide.
How many labels does R have?
One label is on file, entered on June 25, 2014.
- Label 34788 (current) Entered June 25, 2014 · on the market · 90 capsules
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names SI03, Inc. (distributor), Cape Girardeau, MO, U.S.A.. All Syntrax products.