Sustained Release Vita-C 500
by Shaklee · tablet or pill · 180 tablets
- On the market (NIH)
- DSLD label 301172
- Serving 1 tablet
- 180 servings
Sustained Release 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 December 14, 2023.
What is in Sustained Release 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 Hip | in the blend, no amount given | ||
| Grapefruit Bioflavonoid | in the blend, no amount given | ||
| Hesperidinas Citrus x limon, Citrus sinensisHesperidin Complex | in the blend, no amount given | ||
| Lemon Bioflavonoid | in the blend, no amount given | ||
| Orange Bioflavonoid | in the blend, no amount given |
Source: NIH ODS Dietary Supplement Label Database, label 301172 (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?
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 Sustained Release Vita-C 500's, rare ingredients counting for more.
- C-500 mg Timed ReleasePuritan's Pride 3 shared, 64% alike
- C-1000 TrMBi Nutraceuticals 4 shared, 60% alike
- Vitamin C Buffered C-1000Healths Harmony 3 shared, 59% alike
- Vitamin CHealths Harmony 3 shared, 59% alike
- PureWay-C 1,000 mgVitamin Discount Center · off the market 4 shared, 58% alike
- Vitamin C with BioflavonoidsBronson 3 shared, 56% 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 tree nuts, peanuts, milk, soy, wheat, sesame, shellfish, and fish.
- Allergens and what it does not contain
- GF Gluten Free
- No artificial flavors, sweeteners, colors, or preservatives
Source: label statements in DSLD label 301172.
What else is on the label?
Other ingredients: Dicalcium Phosphate, Microcrystalline Cellulose, Hydroxypropyl Methylcellulose, 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 Sustained Release Vita-C 500 have?
One label is on file, entered on December 14, 2023.
- Label 301172 (current) Entered December 14, 2023 · on the market · 180 tablets
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.