How to tell if a vitamin or supplement is kosher

By the KosherVitamins.com team · Updated November 6, 2026

Many vitamins look simple, but capsules, coatings and fillers can come from non-kosher sources. Here are the ingredients that need kosher supervision, and the quickest way to know a supplement is kosher.

Ingredients that need kosher supervision

Gelatin (capsules and softgels)

Most capsules and almost all softgels are made of gelatin, which is often from non-kosher animals. Agencies accept gelatin from kosher-slaughtered cattle or from kosher fish; vegetarian capsules are another option. See our guide to kosher capsules and gelatin.

Glycerin

Glycerin is used in softgels, liquids and chewables. It can come from animal fat, vegetable oil or petroleum, and the Star-K notes there is no visible difference between them, so it needs reliable certification.

Magnesium stearate and stearic acid

These flow agents can be made from tallow (animal fat). In medicines, the Star-K and COR treat the small amount of stearates as nullified, but in food and supplement ingredients the Star-K requires reliable certification for stearic acid and magnesium stearate.

Fish oil and other marine ingredients

Fish oil must come only from kosher species (fish with fins and scales), and certified plants keep non-kosher fish out of the process. Krill is a crustacean and is not kosher. See our fish oil and omega-3 guide.

Glucosamine and calcium

Glucosamine is usually made from crab or lobster shells. The OU writes that in a swallowed pill it may be used from any source, but not in food or flavored powders; corn-fermented glucosamine is a kosher alternative. See our glucosamine guide. Some calcium comes from oyster shell.

Carmine (cochineal)

This red color is made from insects. The cRc treats it as non-kosher, and COR says no national agency certifies it.

Shellac (confectioner's glaze)

Used to coat tablets. U.S. national agencies accept shellac, though some people are stricter.

Lactose, whey, colostrum and other dairy ingredients

These make a product dairy. Lactose is a common tablet filler, and many probiotics are made with dairy. See pareve vs. dairy below.

Enzymes and flavors

Some enzymes (such as pepsin) come from animals, and microbial enzymes are grown on media that need kosher control. "Natural flavors" can include dairy or other sensitive ingredients, which is one reason flavored and chewable vitamins need certification.

Vitamin D3 (lanolin)

Most vitamin D3 is made from lanolin, a substance from sheep's wool. The OU accepts lanolin as kosher; some authorities are stricter. See our vitamin D guide.

Medicine or food? Why opinions differ

Jewish law treats food and medicine differently. Based on the Shulchan Aruch (Yoreh De'ah 155:3), many authorities allow a person who is ill to swallow a tasteless pill that is not kosher when no kosher alternative exists, because swallowing a pill is not the normal way of eating. Authorities differ about vitamins:

• Rav Moshe Feinstein (as cited by Rav Yisroel Belsky) considered vitamins food that needs certification, unless taken to treat a condition.
• Rav Hershel Schachter treats even multivitamins as medicine.
• The Star-K says a healthy person taking supplements should use certified products or ask a rabbi, and that good-tasting non-kosher chewables are not allowed.
• The cRc accepts plain multivitamin and prenatal tablets without certification, but not chewables, liquids, softgels or single-vitamin tablets.

Because standards differ, ask your rabbi which approach to follow. Choosing a certified product avoids the question.

Pareve vs. dairy supplements

A dairy (D) supplement matters if you have just eaten meat. The common custom is to wait six hours between meat and dairy (many of German descent wait three). Products marked DE (dairy equipment) may be taken right after meat, though not together with it. For a swallowed pill containing lactose, Din Online, citing Rav Moshe Feinstein (Igros Moshe YD 2:26), says there is no need to wait after meat, while the Star-K rules that one should wait one hour, say Birchas Hamazon and clean the teeth, even for a healthy person. Chewables and flavored dairy products are treated more like food. Ask your rabbi for your own practice.

How to check a supplement

1. Find the agency symbol on the bottle, and note any D, DE, F or P next to it.
2. Check the form: softgels and gummies usually contain gelatin, and chewables and liquids are treated as food.
3. If there is no symbol, ask the manufacturer which agency certifies it, or ask your rabbi.
4. Check again when you buy a new bottle, because formulas and certifications change.

On KosherVitamins.com the kosher certification for each product is listed on its page, and products that are not certified are labeled "Not Certified Kosher."

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Frequently asked questions

More guides

• Kosher certification symbols on vitamins and supplements
• Kosher capsules and gelatin: softgels, veggie caps and fish gelatin
• Kosher for Passover vitamins and supplements
• Kosher fish oil and omega-3
• Kosher probiotics: dairy vs. pareve
• Kosher vitamin D: D3, D2 and vegan options
• Is glucosamine kosher? Shellfish vs. vegetarian glucosamine

Sources

• OU Kosher: kosher nutraceuticals and supplements, principles and process
• OU Kosher: can you determine if a product is kosher just from the ingredients?
• OU Kosher: glucosamine
• STAR-K: kosher medicine and vitamins
• STAR-K: glycerin and gelatin
• cRc: over-the-counter medicines and vitamins
• cRc: shellac
• COR: gelatin, carmine and shellac
• Jewish Action: navigating the kashrus of medications and vitamins
• Kol Torah: medicines that contain non-kosher ingredients
• STAR-K: meat and dairy, a kosher consumer's handbook
• Din Online: pills with lactose after meat