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Home › Vitamins › Vitamin K2

Vitamin K2 MK-4

Also called K2, mk-7, mk7 and 4 more

menaquinone-7, mk-4, mk4, menaquinone-4.

The best price per 5 mg and per month across 1 UK retailer, and where to buy it cheapest. A unit for comparing, not advice.

Comparing vitamin K2

Labels give menaquinone in micrograms, and some in milligrams: 5 mg is 5,000 mcg. We put every product in one unit before pricing it. Vitamin K2 comes as MK-7 and MK-4, and each form has its own table, because someone buying one would not usually take another as a like-for-like substitute. Products that combine vitamin K2 with other ingredients are listed separately, because their price buys more than menaquinone. 5 mg is our unit for comparing prices, not a dose to take: the label’s directions and a pharmacist decide that.

Prices last checked: . Ranked purely by price per 5 mg — a comparison unit, not a recommendation. We earn commission when you buy through these links; it never affects the order.

Compared at 5,000 µg. Enter the amount you take to see your own costs.

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Vitamin K2, MK-4: products ranked by price per 5 mg
RankProductPer 5 mgPer monthLastsBuyHow it is worked out
1
Thorne Vitamin K2
Cheapest per doseVitamin K2Healf · 30 ml · 80 servings · 15 mg a servingDetails and price historyAdd to my stack
25p£7.568 months£60.49View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 80 (as stated on the label)
  • In the pack: 80 × 15 mg = 1,200 mg
  • £60.49 ÷ 1,200 mg × 5 mg = 25.2p per 5 mg
  • Amount per serving: stated on the label.
What the retailer's listing says
  • pack units “30ml”
  • servings stated “Servings Per Container: 80”
  • amount per serving “Vitamin K [as K2 (MK-4)] ; 15 mg”

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2
Thorne Vitamin D and K2
Best value under 6 months' supplyVitamin D and K2Healf · 30 ml · 600 servings · 200 µg a servingDetails and price historyAdd to my stackalso contains vitamin d3
£1.00£29.9924 days£23.99View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 600 (as stated on the label)
  • In the pack: 600 × 200 µg = 120 mg
  • £23.99 ÷ 120 mg × 5 mg = £1.00 per 5 mg
  • Amount per serving: stated on the label.
  • Also contains: vitamin d3. The price counts the vitamin k2 only.
What the retailer's listing says
  • pack units “30ml”
  • servings stated “Servings Per Container: 600”
  • amount per serving “Vitamin K (as Vitamin K2 (Menatetrenone))^ ; 200 mcg”

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3
Seeking Health Vitamin D3 + K2 Drops
Vitamin D3 + K2 DropsHealf · 900 servings · 50 µg a servingDetails and price historyAdd to my stackalso contains vitamin d3
£2.33£69.979 days£20.99View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 900 (as stated on the label)
  • In the pack: 900 × 50 µg = 45 mg
  • £20.99 ÷ 45 mg × 5 mg = £2.33 per 5 mg
  • Amount per serving: stated on the label.
  • Also contains: vitamin d3. The price counts the vitamin k2 only.
What the retailer's listing says
  • servings stated “Servings Per Container: 900”
  • units per serving “Serving Size: 1 Drop”
  • amount per serving “Vitamin K2 (as Menaquinone-4) ; 50 mcg ; 67%”

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4
Seeking Health Vitamin D3 + K2 Drops
Vitamin D3 + K2 DropsHealf · 900 servings · 50 µg a servingDetails and price historyAdd to my stackalso contains vitamin d3Out of stock
£2.10£62.979 days£18.89View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 900 (as stated on the label)
  • In the pack: 900 × 50 µg = 45 mg
  • £18.89 ÷ 45 mg × 5 mg = £2.10 per 5 mg
  • Amount per serving: stated on the label.
  • Also contains: vitamin d3. The price counts the vitamin k2 only.
What the retailer's listing says
  • servings stated “Servings Per Container: 900”
  • units per serving “Serving Size: 1 Drop”
  • amount per serving “Vitamin K2 (as Menaquinone-4) ; 50 mcg ; 67%”

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By shop

Each shop's vitamin K2 products, with where its cheapest sits in the market.

How we work out these prices

We count the amount of menaquinone stated on the label, converting between units (for example micrograms and IU) so every product is on the same scale.

Our full method · All vitamin K2 forms