+C Boost Sustained Released Vita-C 500
by Shaklee · tablet or pill · 180 tablets
- Off the market since October 2023 (NIH)
- DSLD label 261163
- Serving 1 tablet
- 180 servings
+C Boost Sustained Released Vita-C 500 by Shaklee lists 6 ingredients, 1 with an amount per serving of 1 tablet, such as 500 mg of vitamin C; 5 sit inside a blend without their own amounts, beside 1 Nutrition Facts row (calories, fat and the like). Its current label entered the NIH Dietary Supplement Label Database on February 23, 2022.
What is in +C Boost Sustained Released Vita-C 500?
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 |
|---|---|---|---|
| Total Carbohydrates | less than 1 g | 1% | |
| Vitamin Cas Ascorbic Acid | 500 mg | 556% | Higher than 81% of 18,583 products listing vitamin C (median 100 mg). |
| Proprietary Rose Hips and Bioflavonoid Blend | 50 mg | ||
| Rose Hips | in the blend, no amount given | ||
| Grapefruit Bioflavonoidas Citrus x paradisi | in the blend, no amount given | ||
| Hesperidin Complexas Citrus limon | in the blend, no amount given | ||
| Citrus x sinensis | in the blend, no amount given | ||
| Lemon Bioflavonoid Complexas Citrus x limon | in the blend, no amount given | ||
| Orange Bioflavonoidas Citrus x sinensis | in the blend, no amount given |
Source: NIH ODS Dietary Supplement Label Database, label 261163 (entered February 23, 2022), 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; 5 ingredients sit inside a blend, so their amounts cannot be compared.
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 +C Boost Sustained Released Vita-C 500's, rare ingredients counting for more.
- Liquid Vitamin C Natural FlavorNature's Answer · off the market 4 shared, 61% alike
- Vitamin C 1000 mg Plus Bioflavonoids & RosehipsNatural Factors · off the market 3 shared, 59% alike
- Sustained Release Vitamin C 1000 mg With 200 mg BioflavonoidsNature's Plus · off the market 3 shared, 59% alike
- C-500 mg With Protective Bioflavonoids And Wild Rose HipsVitamin World 3 shared, 59% alike
- C-1000 mg With Protective Bioflavonoids And Wild Rose HipsVitamin World 3 shared, 59% alike
- Buffered Vitamin C 1000 mgUniversal Nutrition / Universal Naturals 3 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
- Directions: Take 1 tablet daily.
- Warnings
- Seal under cap for your protection.
- Manufactured in a facility that may also process peanuts, tree nuts, milk, egg, soy, wheat, shellfish, and fish.
- Allergens and what it does not contain
- Gluten free
- No artificial flavors, sweeteners, colors, or preservatives added.
Source: label statements in DSLD label 261163.
What else is on the label?
Other ingredients: Dicalcium Phosphate, Microcrystalline Cellulose, Hydroxypropyl Methycellulose, Grapefruit Oil.
Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Star-K (Kosher).
How many labels does +C Boost Sustained Released Vita-C 500 have?
One label is on file, entered on February 23, 2022.
- Label 261163 (current) Entered February 23, 2022 · off the market October 17, 2023 · 180 tablets
DSLD also links this label to: Vita-C 500 mg (image difference, same product).
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Shaklee Corporation (distributor), Pleasanton, CA. All Shaklee products.