Puritan's Pride Premium Vitamin K 100mcg, 100 Tablets Review

Puritan's Pride Vitamin K 100 mcg (Item #003070) is a dietary supplement offered in a bottle size of 100 tablets, providing a potency of 100 mcg of Vitamin K per serving. According to the product description, Vitamin K is an essential nutrient that is necessary for the formation of prothrombin, a critical protein which is required by the body for normal blood clotting. Furthermore, Vitamin K is highlighted as a great companion nutrient to take alongside Calcium and Vitamin D supplements to support overall wellness and bone health. Each single-tablet serving delivers 100 mcg of Vitamin K in the form of Phytonadione, which equates to 83% of the recommended Daily Value. For optimal use, the directions state that adults should take one (1) tablet daily, preferably with a meal. The tablet formulation is crafted using specific other ingredients, which include Dicalcium Phosphate, Vegetable Cellulose, Vegetable Stearic Acid, and Vegetable Magnesium Stearate. This supplement is certified Gluten Free, Vegetarian, and Non-GMO. In addition, the formula is free from common allergens and additives: it contains No Artificial Color, Flavor, or Sweetener, No Preservatives, No Sugar, No Starch, No Milk, No Lactose, No Soy, No Gluten, No Wheat, No Yeast, No Fish, and is completely Sodium Free. For safety, the product label advises that if you are pregnant, nursing, taking any medications, or have any medical condition, you should consult your doctor before use. Users should discontinue use and consult a doctor if any adverse reactions occur, keep the bottle out of reach of children, store it at room temperature, and not use the product if the seal under the cap is broken or missing. For more than 50 years, Puritan's Pride has helped families achieve a lifestyle of wellness by making vitamins and supplements with care from the highest quality ingredients, which are tested or inspected as many as 15 times throughout the manufacturing process so customers can shop with confidence.

Product Focus: Bone Health
Tier ⓘ
Members see this product's tier and why. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
Biohacker Mentions
Cost per month
$719 at 2 servings

Study, Trial or Testing Result Summary

MembersHuman studies

This product contains vitamin K1 (phytonadione), 100 micrograms per tablet, or 200 micrograms at the two tablets a day members are told to take. of the bone research tested a different form, vitamin K2. …

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Review Totals and Summary

Members325 reviews
325 reviews · Walmart 230 · Puritan's Pride 86 · EBay 8 · Ubuy 1

Puritan's Pride Premium Vitamin K 100mcg, 100 Tablets has garnered approximately 316 ratings across various stores, with of reviews giving it 4 or 5 stars. This summary focuses exclusively on the tablet form of the product, excluding feedback on other formats like capsules or softgels. **What it did for buyers** customers report outcomes from using these Vitamin K tablets. …

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Biohacker Summary

MembersWhat our biohacker panel says

Vitamin K is the main ingredient here, and ten panelists spoke about it, in its K2 form. Five of them say they take it, usually 90 to 100 mcg of K2 in the morning for general or longevity, and one of those takes the MK-7 form daily. …

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RAL Summary

MembersThe tier and why

The tier-2 grade rests mainly on trials of vitamin K2 (menaquinone) and of vitamin K combined with vitamin D, but this product is vitamin K1 (phytonadione), and the two trials that tested vitamin K1 alone found change in bone density. …

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More Details

MembersBody systems · Combine with · Possible side effects

Body systems: Skeletal system, Blood and clotting. Combine with and possible side are for members.

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Supplement Facts

Vitamin K 100 mcg
Supplement Facts
Serving Size 1 tablet
Servings Per Container none
Amount Per Serving% Daily Value
Vitamin K (as Phytonadione)100 mcg83%

Other ingredients: Dicalcium Phosphate, Vegetable Cellulose, Vegetable Stearic Acid, Vegetable Magnesium Stearate.

Directions: For adults, take one (1) tablet daily, preferably with a meal.

Label source: Puritan · Report a label change

Where to Buy

Walmart · Puritan · Ubuy
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Our articles on this subject

Graded October 28, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.