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Supplements: O

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2,905 supplements starting with "O"

Showing 251–300 of 2,905

Sort by: Name Newest Brand
Product Ingredients
Olive Off-market 3
Olive Off-market 3
Olive 4
Olive 250 mg 17% Oleuropein 8
Olive 250 mg 22% Oleuropein 8
Olive Alcohol Free 3
Olive Complex Leaf & Fruits Extract 6
Olive Dry Leaf Extract Off-market 3
Olive Flower Essence 3
Olive Formula 1,000 mg 6
Olive Leaf 3
Olive Leaf 3
Olive Leaf Off-market 4
Olive Leaf Off-market 3
Olive Leaf 3
Olive Leaf 1
Olive Leaf 4
Olive Leaf Off-market 3
Olive Leaf Off-market 4
Olive Leaf Off-market 4
Olive Leaf 6
Olive Leaf 3
Olive Leaf 4
Olive Leaf 4
Olive Leaf 6
Olive Leaf 4
Olive Leaf 2
Olive Leaf 2
Olive Leaf + FOS 6
Olive Leaf 1,500 mg 3
Olive Leaf 125 mg Off-market 9
Olive Leaf 250 mg 6
Olive Leaf 250 mg 5
Olive Leaf 40% Oleuropein 4
Olive Leaf 400 mg 2
Olive Leaf 500 mg Off-market 3
Olive Leaf 500 mg Off-market 2
Olive Leaf 500 mg 2
Olive Leaf 500 mg Extended Release Off-market 8
Olive Leaf 750 mg 6
Olive Leaf 750 mg 6
Olive Leaf Alcohol Free 3
Olive Leaf Andrographis 10
Olive Leaf Complex Natural Olive Leaf Flavor 8
Olive Leaf Complex Peppermint Flavor 8
Olive Leaf Complex Throat Spray Peppermint Flavor 11
Olive Leaf Extract Off-market 2
Olive Leaf Extract Off-market 6
Olive Leaf Extract Off-market 5
Olive Leaf Extract 4

Letter "O" cohort across the 26-letter alphabet

Counts of products per letter. Letter "O" sits within 2905 entries.

products
Source NIH Dietary Supplement Label Database (DSLD) As of 2026

Top 10 letters by total product count

Letters with the most product entries, selecting a letter narrows the directory.

products
Source NIH Dietary Supplement Label Database (DSLD) As of 2026

Bottom 10 letters by total product count

Less-populated letters, useful for spotting niche-named brands.

products
Source NIH Dietary Supplement Label Database (DSLD) As of 2026

Why an alphabetical letter index?

The alphabetical browse exists because most casual searches start from a known product or brand name. If you remember the bottle in your cabinet starts with "O", this is the fastest way to scan all matching products in the NIH Dietary Supplement Label Database (DSLD). The full directory contains 2,905 products under "O", sortable by name, newest entry, or brand. For comparing products within a category (vitamin D, fish oil, multivitamins), use the type-filtered listing instead. For brand-level analysis, jump to the brands directory.

Per-product detail pages show the declared ingredient list, serving size, market status, and Daily Value (DV) percentages, when those values were submitted to the NIH on the original label filing. Many DSLD records include only structural ingredient lists without the per-row Supplement Facts panel; in those cases the detail page renders "Not disclosed on label" rather than a fabricated estimate. Editorial commentary and ingredient context is compiled by our editorial process. Inclusion in the directory is a label record, not an FDA endorsement, quality verification, or clinical efficacy claim. Always verify amounts on the physical label and consult a healthcare provider before starting any supplement, particularly if pregnant, nursing, taking prescription medication, or managing a medical condition.

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Data sourced from the NIH Office of Dietary Supplements, Dietary Supplement Label Database (DSLD). See our methodology for details.

Every figure on PlainVitamins is rendered directly from the NIH Dietary Supplement Label Database (DSLD), no number is typed in by an editor. This page draws directly on the NIH DSLD, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.