PlainVitamins

Vitamin C and Bio-Quercetin Phytosome

by Life Extension · tablet or pill · 250 vegetarian tablets

  • On the market (NIH)
  • UPC 7 37870 22272 9
  • DSLD label 328796
  • Serving 1 vegetarian tablet
  • 250 servings

Vitamin C and Bio-Quercetin Phytosome by Life Extension lists 4 ingredients, 3 with an amount per serving of 1 vegetarian tablet, such as 1,000 mg of vitamin C and 15 mg of bio-quercetin phytosome; 1 sits inside a blend without its own amount. Its current label entered the NIH Dietary Supplement Label Database on June 25, 2025.

What is in Vitamin C and Bio-Quercetin Phytosome?

Each row as the label prints it, per serving of 1 vegetarian 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).

Vitamin C and Bio-Quercetin Phytosome: Supplement Facts rows against the market (DSLD label 328796, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Cas Ascorbic Acid1,000 mg1,111%Vitamin C in Vitamin C and Bio-Quercetin Phytosome against 18,583 products1,000 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg1,000 mg

Higher than 91% of 18,583 products listing vitamin C (median 100 mg).

Bio-Quercetin Phytosome15 mgQuercetin in Vitamin C and Bio-Quercetin Phytosome against 1,548 products15 mg per serving; the middle half of products list 26.5 mg to 250 mg, the median 100 mg.15 mg

87% of 1,548 products listing quercetin give more (median 100 mg).

Quercetinas Japanese Sophora Concentrate5 mg
Phosphatidylcholine Complexas Sunflowerno amount given

Source: NIH ODS Dietary Supplement Label Database, label 328796 (entered June 25, 2025), 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 vitamin C is higher than 91% of the 18,583 vitamin C products that print an amount; 445 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 Vitamin C and Bio-Quercetin Phytosome's, rare ingredients counting for more.

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: Take one (1) tablet daily with food, or as recommended by a healthcare practitioner.
Warnings
Read the entire label and follow the directions carefully prior to use.
Warnings: Keep out of reach of children.
Do not exceed recommended dose. Do not purchase if outer seal is broken or damaged.
When using nutritional supplements, please consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.
To report a serious adverse event or obtain product information, contact 1-866-280-2852.
Allergens and what it does not contain
Gluten free Non GMO Le certified
Storage
Store tightly closed in a cool, dry place.

Source: label statements in DSLD label 328796.

What else is on the label?

Other ingredients: Microcrystalline Cellulose, Stearic Acid, Croscarmellose Sodium, Stearate, Silica, Hydroxypropyl Methylcellulose, Glycerin.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Non GMO Le certified.

How many labels does Vitamin C and Bio-Quercetin Phytosome have?

6 labels are on file under this name since January 25, 2020: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 328796 (current) Entered June 25, 2025 · on the market · 250 vegetarian tablets · UPC 7 37870 22272 9
  2. Label 328477 Entered May 21, 2025 · on the market · 30 packets
  3. Label 232752 Entered August 23, 2020 · off the market August 9, 2023 · 250 vegetarian tablets · UPC 7 37870 22272 9
  4. Label 232377 Entered August 23, 2020 · off the market August 9, 2023 · 60 vegetarian tablets · UPC 7 37870 22286 6
  5. Label 210913 Entered January 25, 2020 · off the market July 14, 2020 · 60 vegetarian tablets · UPC 7 37870 22286 6
  6. Label 210912 Entered January 25, 2020 · off the market July 14, 2020 · 250 vegetarian tablets · UPC 7 37870 22272 9

Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).

Who makes it?

The label names Quality Supplements and Vitamins, Inc. (distributor), Ft. Lauderdale, FL. All Life Extension products.

Where next?