PlainVitamins

Kava 500 mg

by Source Naturals · tablet or pill · 30 tablets

  • On the market (NIH)
  • UPC 0 21078 02525 2
  • DSLD label 295931
  • Serving 1 tablet
  • 30 servings

Kava 500 mg by Source Naturals lists 3 ingredients, 3 with an amount per serving of 1 tablet, such as 57 mg of calcium and 500 mg of kava root extract, beside 1 Nutrition Facts row (calories, fat and the like). Its current label entered the NIH Dietary Supplement Label Database on August 23, 2023.

What is in Kava 500 mg?

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).

Kava 500 mg: Supplement Facts rows against the market (DSLD label 295931, January 2026 release)
IngredientAmount% DVAmong products listing it
Total Carbohydrates1 g1%Carbohydrate in Kava 500 mg against 21,979 products1 g per serving; the middle half of products list 1 g to 6 g, the median 3 g.1 g

74% of 21,979 products listing carbohydrate give more (median 3 g). Per day at the most servings: 2 g.

Calcium57 mg6%Calcium in Kava 500 mg against 17,831 products57 mg per serving; the middle half of products list 50 mg to 252 mg, the median 115 mg.DV 1,300 mgUL 2,500 mg57 mg

70% of 17,831 products listing calcium give more (median 115 mg). Per day at the most servings: 114 mg.

Kava root extractas KavalactonesKava root extract (Form: standardized to 30% Kavalactones CorrectedName: kava) Genus: Piper Species: methysticum Note: yielding500 mgKava kava in Kava 500 mg against 97 products500 mg per serving; the middle half of products list 100 mg to 500 mg, the median 250 mg.500 mg

Higher than 73% of 97 products listing kava kava (median 250 mg). Per day at the most servings: 1,000 mg.

Kavalactones150 mg

Source: NIH ODS Dietary Supplement Label Database, label 295931 (entered August 23, 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.

The NIH database records 1 to 2 servings 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 Kava 500 mg's, rare ingredients counting for more.

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
Suggested use: 1 tablet 1 to 2 times daily.
Warnings
Warning: US FDA advises that a potential risk of rare, but severe, liver injury may be associated with kava-containing dietary supplements.
Ask a healthcare professional before use if you have or have had liver problems, frequently use alcoholic beverages or are taking any medication.
Stop use and see a doctor if you develop symptoms that may signal liver problems (e.g. unexplained fatigue, abdominal pain, loss of appetite, fever, vomiting, dark urine, pale stools, yellow eyes or skin).
Not for use by persons under 18 years of age, or by pregnant or breastfeeding women.
Not for use with alcoholic beverages. Excessive use or use with products that cause drowsiness may impair your ability to operate a vehicle or heavy equipment. Do not use if tamper-evident seal is broken or missing.
Keep out of the reach of children.
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 295931.

What else is on the label?

Other ingredients: Dibasic Calcium Phosphate, Sorbitol, Stearic Acid, modified Cellulose Gum, Silica, Magnesium Stearate.

How many labels does Kava 500 mg have?

2 labels are on file under this name since June 23, 2017: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 295931 (current) Entered August 23, 2023 · on the market · 30 tablets · UPC 0 21078 02525 2
  2. Label 73737 Entered June 23, 2017 · on the market · 60 tablets · UPC 0 21078 02526 9

Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).

Who makes it?

The label names Source Naturals, Inc. (distributor), Santa Cruz, CA. All Source Naturals products.

Where next?