The panel prints "Vitamin C (as Ascorbic Acid) 500 mg 556%" per serving of 1 tablet. Milligrams of vitamin C are the comparison basis here and the panel prints milligrams, so 500 mg is read off the label rather than computed; the panel names the form as ascorbic acid. This panel prints no "Servings Per Container" line. The serving it does print is 1 tablet and the front face prints "250 TABLETS", so the container holds 250 servings: the label's own count against the label's own serving.
Delivery
Delivery cost
$8.00
Below the $25.00 free-delivery threshold; $7.01 more would make delivery free.
Set the quantity at the retailer; this calculator does not add items to a cart. Uses the recorded unit price with no coupon or quantity discount. Tax is extra. Delivery terms apply to the contiguous US unless the policy says otherwise.
Free shipping within the contiguous United States on orders of $25 or more before tax, and a flat $8 fee below that, from Nature Made’s own shipping policy page read September 23, 2026 and again on October 17, 2026: "Free shipping within the contiguous U.S. is available on: Orders $25+ (before tax)" and "A flat $8 shipping fee applies to: Orders under $25". Shipments outside the contiguous United States, including Alaska and Hawaii, carry the same $8 fee. The page calls neither term temporary. It also says some products or state requirements may add cost, shown at checkout, so a delivered total can be higher than these two figures describe.
Where to buy
Nature Made (direct) · lowest recorded available price
Ordered by price, lowest first, and labeled so you can see what each link earns us. Commission is never an input to that ordering. If the cheapest retailer pays us nothing, that is still the one we send you to. No link on this page earns us anything; every Buy button is a plain retailer link.
Price history
Latest recorded price: $17.99 at Nature Made (direct), checked . Unchanged since we started checking on Oct 17 (11 checks).
We check each price about once a day, so this is the range we recorded, not necessarily every price there has been. It says what changed, not why, and nothing about where the price goes next.
Verification, Tier A?: In USP's directory, not confirmed at this package
USP Verified’s directory holds a row matching this product, and this package’s label does not carry the USP mark, so it is not confirmed at this package and we do not present it as a certification of it. What the record shows is set out below.
USP Verified holds a directory row matching this product, and this package's label does not carry the USP mark, so it is not confirmed at this package. USP's Verified Products directory, read in full on Sep 21, 2026, carries the row "Nature Made Vitamin C 500 Mg Tablets", which names this product and strength and no package size. This package's own label, read Oct 17, 2026, prints no USP Verified Mark on either face the store publishes, and where the 100-tablet bottle of the same line prints USP's own sentence on its back, this one prints "Tableted and quality tested in the USA. Made to our guaranteed purity and potency standards." The test this site applies to USP needs both the directory row and the mark on this package's own label. Only the row is there, so this is not confirmed at this package.
Checked NSF Certified for Sport database on Oct 17, 2026: not listed.
NSF Certified for Sport: checked, not listed
Checked and absent. The full Certified for Sport directory read of Sep 24, 2026 holds one row under Nature Made, listing 1809934 "Micronized Powder Creatine Monohydrate", and no vitamin C row under this brand at all. Absence from a database is not a failed test. NSF's whole directory was read again on Oct 17, 2026, 2,581 listings, and still holds no vitamin C listing under this brand.
USP Verified: directory row, no mark on this label
USP's Verified Products directory, read in full on Sep 21, 2026, carries the row "Nature Made Vitamin C 500 Mg Tablets", which names this product and strength and no package size. This package's own label, read Oct 17, 2026, prints no USP Verified Mark on either face the store publishes, and where the 100-tablet bottle of the same line prints USP's own sentence on its back, this one prints "Tableted and quality tested in the USA. Made to our guaranteed purity and potency standards." The test this site applies to USP needs both the directory row and the mark on this package's own label. Only the row is there, so this is not confirmed at this package.
What USP Verified checks
Confirms the label’s dose
Yes
Tests for heavy metals / contaminants
Yes
Screens for substances banned in sport
No
Reviews manufacturing
On-site audit
Testing frequency
Audits plus off-the-shelf testing
From the program's own published description of its process. Source. “Not stated” means the program does not publish a clear answer. It does not mean no.
Nature Made does not appear as a brand in LGC's own Informed Sport product list of October 2026, 497 brands and 1,887 product lines, as read on Oct 3, 2026. Absence from a list is not a failed test: Informed Sport certifies the products a company submits, so this records only that none from this brand is in the program's published list on that date.
Nature Made is on LGC's own Informed Choice product list of October 2026 with 12 product lines, as read on Oct 3, 2026, and none of them names a vitamin C product. Absence from a list is not a failed test: Informed Choice certifies the products a company submits, so this records only that this product is not in the program's published list on that date.
No laboratory report with figures is recorded here for this product.
Not established: Heavy-metal testing, Label-accuracy testing, Vegan status.
Absence of data is not evidence that a product is clean. It means we found no published result for that testing.
Label
Form
tablet
Serving size
1 tablet
Active ingredient
Vitamin C: 500mg as labeled
The panel prints "Vitamin C (as Ascorbic Acid) 500 mg 556%" per serving of 1 tablet. Milligrams of vitamin C are the comparison basis here and the panel prints milligrams, so 500 mg is read off the label rather than computed; the panel names the form as ascorbic acid. This panel prints no "Servings Per Container" line. The serving it does print is 1 tablet and the front face prints "250 TABLETS", so the container holds 250 servings: the label's own count against the label's own serving.
Same category and format and, where a category is compared by strength, the same labeled strength. Different recorded ingredient-form lists are kept separate. Ordered by container price before delivery; only fresh recorded prices are shown. Formulas, flavors and allergens may differ: check each label. These are browsing options, not recommended substitutes.
What this rests on: prices we last recorded at the retailer named on each product page, which go stale, and each page says when it was checked; the products we track, not every product sold, and Amazon and Walmart are not among the stores; listings and labels read at the source, each linked from the page. Found an error? Tell us. The full method: How we compare.