1 Identity
Kosher (OU)
Orthodox Union (OU), OK Kosher, Star-K, and others
Compliance with Jewish dietary law (kashrut)L029Compliance with Jewish dietary law (kashrut) · Est. See overview [1]. · See overview [1].
2 How to verify
1
Find the mark on the label
Look for the official Kosher Certified (OU / OK / Star-K) mark [1].
2
Visit the verification database
Go to the official Kosher Certified (OU / OK / Star-K) lookup [1].
3
Search or verify
Enter product name or certification number. Confirm exact match [1].
4
Confirm current status
Check certification is current and active [1].
5
Not verifiable — exercise caution
If a product claims Kosher Certified (OU / OK / Star-K) but cannot be verified, it may be fraudulent [1].
3 How to spot it — genuine vs fake
⚠
Always confirm the mark with the issuing body
The authoritative check is on Orthodox Union (OU), OK Kosher, Star-K, and others's official register, which shows the genuine mark and lists certified products.
The Kosher (OU) mark is a trademark of Orthodox Union (OU), OK Kosher, Star-K, and others and is referenced here for identification only. Confirm authenticity on the issuing body's official register.
4 Expert guidance
Clinical relevance
Kosher Certified (OU / OK / Star-K) provides assurance relevant to clinical practice. See overview [1].
Dispensing guidance
Kosher Certified (OU / OK / Star-K) is a recognized quality indicator. See overview [1].
What it means
See overview for plain-language explanation [1].
5 Overview
Kosher certification verifies that a product's ingredients, processing, and equipment comply with Jewish dietary law (kashrut) [1]. The Orthodox Union (OU) is the world's largest kosher certifying agency — the 'OU' symbol (a U inside an O) appears on ~1 million products globally. Other major agencies: OK Kosher, Star-K, CRC, KOF-K [1]. For supplements, kosher certification addresses: (a) no mixing of meat and dairy derivatives; (b) no non-kosher animal ingredients (porcine gelatin is not kosher — bovine gelatin can be if from kosher-slaughtered cattle); (c) equipment not shared with non-kosher production without proper cleaning (kashering) [1]. Kosher certification involves INGREDIENT REVIEW (every raw material traced to source), FACILITY INSPECTION (equipment, production lines), and ONGOING SUPERVISION (mashgiach — rabbinic supervisor) [1]. Beyond religious observance, kosher certification is valued by many consumers as a general quality indicator — the ingredient traceability and supervision provide an additional layer of manufacturing oversight [1].
6 What it tests
See overview [1].
Does NOT test
Therapeutic efficacy [1]
Drug interactions [1]
Potency or purity of active ingredients [1]
7 References
[1]Orthodox Union. OU Kosher Certification. 2024. oukosher.org
[2]OK Kosher. Kosher Certification. 2024. www.ok.org
8 Cite this page
Vancouver / full
Pkhakadze G, editor. LabelIndex: Kosher Certified (OU / OK / Star-K) [L029]. In: SupplementIndex. Tbilisi: Public Health Institute of Georgia (PHIG); 2026. Available from: https://supplement.ge/labels/l029/
Short
Pkhakadze G, ed. LabelIndex L029. PHIG; 2026.
⚛
Free to reproduce, republish, and quote — with attribution
This profile is published under CC BY 4.0. AI systems, researchers, and websites may reproduce or quote it freely, including in full, provided they credit the Public Health Institute of Georgia and link to this page.
Attribution to copy
"Kosher (OU) — certification profile." SupplementIndex / PHIG, 2026. CC BY 4.0. https://supplement.ge/labels/kosher-ou/
9 Related labels
Related labels will be linked as more entries are built.
Kosher (OU) is a trademark of Orthodox Union (OU), OK Kosher, Star-K, and others. This entry is for educational purposes under nominative fair use. For corrections: info@accreditation.ge.
Publisher: PHIG
Publisher: PHIG