NAC 1,000 mg Quercetin 500 mg & Zinc 15 mg
by NOW · capsule · 90 veg capsules
- On the market (NIH)
- UPC 7 33739 03088 7
- DSLD label 303931
- Serving 2 veg capsules
- 45 servings
NAC 1,000 mg Quercetin 500 mg & Zinc 15 mg by NOW lists 4 ingredients, 4 with an amount per serving of 2 veg capsules, such as 15 mg of zinc, 1,000 mg of N-acetyl cysteine and 500 mg of quercetin. Its current label entered the NIH Dietary Supplement Label Database on December 14, 2023.
What is in NAC 1,000 mg Quercetin 500 mg & Zinc 15 mg?
Each row as the label prints it, per serving of 2 veg capsules. 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 |
|---|---|---|---|
| Zincelemental | 15 mg | 136% | Higher than 56% of 13,186 products listing zinc (median 11 mg). |
| Albion Zinc Bisglycinate | 75 mg | ||
| N-Acetyl Cysteine | 1,000 mg | Higher than 96% of 1,259 products listing N-acetyl cysteine (median 150 mg). | |
| Quercetin | 500 mg | Higher than 84% of 1,548 products listing quercetin (median 100 mg). |
Source: NIH ODS Dietary Supplement Label Database, label 303931 (entered December 14, 2023), 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?
The rows in the top or bottom tenth of the products that list the same ingredient, and any above the adult upper limit at the most servings a day the directions give:
- Its 1,000 mg of N-acetyl cysteine is higher than 96% of the 1,259 N-acetyl cysteine products that print an amount; 25 list more.
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?
The products whose ingredient lists overlap most with NAC 1,000 mg Quercetin 500 mg & Zinc 15 mg's, rare ingredients counting for more.
- Ultimate Respiratory DefenseSwanson 2 shared, 79% alike
- OrthoMuneOrtho Molecular Products 3 shared, 73% alike
- Immune Essentials DailyXYMOGEN 3 shared, 63% alike
- Mega NAC + QuercetinBody Kitchen 2 shared, 59% alike
- Zinc 30 mg & Quercetin 50 mgNatural Grocers by Vitamin Cottage 2 shared, 59% alike
- Zinc QuercetinVitamatic 2 shared, 59% 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
- Suggested usage: Take 2 capsules daily.
- Warnings
- Caution: For adults only.
- Quercetin may interact with a variety of medications; consult physician before using this product if taking prescription drugs (especially nitroglycerin). Consult physician if pregnant/nursing or have a medical condition.
- Keep out of reach of children.
- Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nut or sesame ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.
- Allergens and what it does not contain
- Non-GMO
- Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nut or sesame ingredients.
- Storage
- Store in a cool, dry place after opening.
Source: label statements in DSLD label 303931.
What else is on the label?
Other ingredients: Hypromellose, Ascorbyl Palmitate, Silicon Dioxide, Citric Acid.
Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): GMP Quality Assured.
How many labels does NAC 1,000 mg Quercetin 500 mg & Zinc 15 mg have?
One label is on file, entered on December 14, 2023.
- Label 303931 (current) Entered December 14, 2023 · on the market · 90 veg capsules · UPC 7 33739 03088 7
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names NOW Foods (manufacturer), Bloomingdale, IL. All NOW products.