Key takeaways
- Vitamin K2 is the menaquinone side of the vitamin K family, and it plays a key role in supporting bone and possibly heart health.
- The typical Western diet does not contain adequate sources of vitamin K2, which is why it turns up in daily formulas.
- Each 10 g scoop carries 50 mcg of vitamin K2 as menaquinone 7, published per gram and per serve.
- We chose MK-7 because K2 is absorbed by your body more slowly than vitamin K1, and stays in your body longer, several days even.
- D3 increases calcium absorption while K2 directs it to the right place, and both sit in the same scoop.
What is vitamin K2, and what does it do in your body?
Vitamin K2 is one of the two forms of vitamin K, and it supports bone and cardiovascular health.
Vitamin K is an essential vitamin that occurs in two forms, K-1 and K-2. K2 also goes by menaquinone, a lesser-known but essential nutrient that plays a key role in supporting bone and possibly heart health.
Think of the family as one job title with two employees. Vitamin K plays a role in blood clotting and bone metabolism. The body needs both types to produce prothrombin, a protein with crucial roles in blood clotting, bone metabolism and heart health. K-1 is primarily involved in blood coagulation. K-2 may have a more diverse range of functions in the body.
The class is made up of vitamin K1, plus vitamin K2 and its 10 subtypes, known as MK-4 to MK-13. That's the reason labels get specific about which one they've used.
Where does vitamin K2 fit into a day that's already full?
It fits where you already are: one scoop in the morning, no extra step to build.
The reason K2 keeps appearing on daily formulas is dietary. The typical Western diet does not contain adequate sources of vitamin K2. It's less common in the diet than K1 and is found mainly in fermented foods and certain animal products. Poor dietary intake, particularly low consumption of vitamin K2-rich foods, can lead to insufficiency. Insufficiency is less common than with K1 but can occur, especially in people with poor diets or digestive complications from certain medications.
Most supplements get abandoned by week two. Not because they stop working, but because five bottles on a bench is a chore. We built Hoola so daily nutrition takes one action, not seven. Clear head, balanced body, and a routine you'll still be doing in March.
How much vitamin K2 is in each scoop, and in what form?
Each 10 g serve delivers 50 mcg of vitamin K2 as menaquinone 7, which is 5 mcg per gram.
The recommended daily intake of vitamin K varies by age, sex and life stage. We publish our figure both ways so you can compare it against whatever number you're working from. Every per-serve figure below is the per-gram figure times ten. Both are published.
Micrograms are easy to misread, so the conversions sit here too. Vitamin K2 50 mcg = 0.05 mg. Vitamin K1 90 mcg = 0.09 mg. Vitamin D3 25 mcg = 0.025 mg, which is 1,000 IU. Biotin 3,000 mcg = 3 mg. Folate 890 mcg = 0.89 mg. Chromium 400 mcg = 0.4 mg. Potassium iodide 200 mcg = 0.2 mg. Selenomethionine 150 mcg = 0.15 mg. Molybdenum 80 mcg = 0.08 mg. Vitamin B12 50 mcg = 0.05 mg.
The ARTG certificate lists all 27 active ingredients with exact quantities per gram. We provide full formula transparency, including dosages of all functional ingredients, with expert formulation at therapeutic dosages. Tiny nutrients, doing big things, at numbers you can check.
Why did we choose menaquinone-7 over other vitamin K forms?
We chose MK-7 because it is one of the two most important K2 subtypes, and because K2 in this form is absorbed slowly and hangs around.
Of the K2 subtypes, the most important ones are MK-4 and MK-7. The interesting part of K2 is that it is absorbed by your body more slowly than vitamin K1. Where vitamin K1 is quickly filtered out of your blood, often within a matter of hours, vitamin K2 has the potential to be longer-lasting. It stays in your body longer, several days even, and has more time to do its good work.
Absorption is the other half. The absorption of vitamin K1 is fairly low because of its structure. This newer form of vitamin K is more effectively absorbed and retained longer in the body.
Hoola uses active and bioavailable forms wherever possible, in line with Australian quality manufacturing standards. Built in Australia, backed by science, formulated for the dual state we all want: calm clarity plus energised capability.
How does vitamin K2 work with the rest of the formula?
K2 works with the vitamin D3 and manganese already in the scoop, which is the point of building one balanced dose instead of a shelf of singles.
Vitamin D3 and K2 work together to regulate calcium. D3 increases calcium absorption, while K2 directs it to the right place. That's why some supplements combine vitamin K with complementary nutrients such as vitamin D3 to support bone and cardiovascular health. Ours does it at 25 mcg of vitamin D3 and 50 mcg of K2 per 10 g serve.
The mechanism sits in the proteins. Vitamin K2 helps activate proteins that regulate where calcium ends up in your body. It plays a central role in calcium metabolism, the main mineral found in your bones and teeth. Manganese sits alongside at 50 mg per serve, supporting bone formation.
Hoola is designed as a single, balanced daily dose, not a collection of separate supplements. The value sits in how the ingredients work together. Buying the same list separately looks like 20+ supplements, over $250 a month in separate products and 15+ capsules a day. Hoola is $3.30 a day on subscription. Small team of nutrients, major impact, one scoop.
Who tends to care about getting vitamin K2 daily?
People thinking about bone strength and cardiovascular health, and anyone whose diet or medication makes K2 harder to come by.
Vitamin K2 is helpful in supporting bone density in post-menopausal women and helps support cardiovascular system health. Some medicines can disrupt gut bacteria responsible for synthesising vitamin K2, contributing to insufficiency.
The claims we hold for K2 in Hoola are simple. Maintain and support bone health, strength and density. Maintain and support cardiovascular system health and function.
We made Hoola to make wellness simpler, smarter and more enjoyable, for anyone who wants to fuel themselves to get more out of life.
How should you take vitamin K2 day to day?
Take it the same way you take the rest of the scoop: one 10 g serve, every morning.
Mix one 10 g scoop into 300-400 ml of cold water each morning. Best taken in the morning or early afternoon, and not close to bedtime, because of the 100 mg of caffeine. There is no half serve, no double serve and no weekly total. Hoola is one 10 g scoop a day.
K vitamins are fat-soluble, meaning they dissolve in fats and oils. Plenty of people take their scoop around breakfast for that reason.
Consistency over intensity. Most of our customers feel the biggest benefits with consistency, which is the whole design brief for a powder you actually enjoy drinking. Hoola is a philosophy of modern performance and balance. The powder is how you practise it each morning.
Frequently asked questions
What should you look for in a vitamin K2 supplement in Australia?
Look for the K2 form named on the label, the dose disclosed in mcg, and an AUST L number you can check. Vitamin K supplements are available in a variety of forms to suit different preferences and absorption needs. Hoola is a Listed supplement on the Australian Register of Therapeutic Goods, AUST L 508472, with an ARTG start date of 8 August 2025, sponsored by Hoola Australia Pty Ltd. Every active and quantity sits on the public register.
Which food is highest in vitamin K2?
Natto. This traditional Japanese food contains the highest known levels of vitamin K2, over 800 mcg per serving.
What foods contain vitamin K2?
Dietary sources of vitamin K-2 include animal proteins and fermented foods. Menaquinone is present in small quantities in organ meats and fermented foods.
Do eggs contain vitamin K2?
Yes. Egg yolks contain vitamin K2, along with grass-fed butter and meat, cheese and fermented foods like natto, though in small amounts.
Does cheese contain vitamin K2?
Yes. Vitamin K2 is more common in animal products, fermented foods and some kinds of cheese.
Do fermented foods contain vitamin K2?
Yes. Vitamin K2, menaquinone, is produced by bacteria in the gut and found in some fermented foods. While vitamin K1 is found mainly in leafy greens, vitamin K2 is found in certain animal and fermented foods and is vital for calcium metabolism and possibly cardiovascular health.
What is vitamin K2-7, and why does it appear on labels?
Vitamin K2-7 is menaquinone-7, a more bioavailable form of K2. Vitamin K2 can be further divided into several different subtypes, so the number tells you which one you're getting. Ours is menaquinone 7, at 50 mcg per 10 g serve.
How is vitamin K1 different from vitamin K2?
K1 is the plant one, K2 is the animal and fermented one. Vitamin K1 comes from plant sources, like leafy greens and blueberries. K-1 is the primary form of the vitamin, and it is mainly present in leafy green vegetables. The body has difficulty absorbing vitamin K-1 from plants.
Should you choose a vitamin K1 or a vitamin K2 supplement?
They aren't interchangeable. K1 and K2 work differently in your body and come from different food sources. Vitamin K as a class contributes to the maintenance of normal bones and supports the body's blood clotting process. Hoola includes both: 90 mcg of vitamin K1 as phytomenadione and 50 mcg of vitamin K2 as menaquinone 7 per 10 g serve.
What forms do vitamin K supplements come in?
Tablets and capsules are the common formats, supporting bone health and blood clotting functions. Liquid formulations are also available and may be preferred by those who have difficulty swallowing tablets. Vitamin K1 supplements are more commonly available and may be suitable for general health support. Hoola is a powder, mixed into cold water.
Can you take vitamin K2 and vitamin D3 together?
Yes, and they're better together. Vitamin D3 and K2 work together to regulate calcium: D3 increases calcium absorption, while K2 directs it to the right place. Hoola carries both in the same scoop, with D3 supporting calcium absorption, bone strength, muscle and immune function.
What does vitamin K2 have to do with calcium?
K2 is the traffic control. Vitamin K2 helps activate specific proteins, which help bind calcium. These proteins help move calcium from the blood into the bones, where it contributes to maintaining bone strength. Vitamin K2 also helps with the transport of calcium throughout the body.
What do the sources say about vitamin K2 and heart health?
They point back to calcium placement. Vitamin K is believed to help by preventing calcium from being deposited in your arteries. Vitamin K2 maintains a healthy cardiovascular system, including a healthy heart and blood and cardiovascular functions.
How would you know if you were low in vitamin K2?
Easy bruising is the most prominent symptom of vitamin K insufficiency, including K2. Vitamin K insufficiency can also disrupt bone mineralisation, affecting bone health.
Does vitamin K2 need to be taken with food?
K vitamins are fat-soluble, meaning they dissolve in fats and oils. The Hoola instruction stays the same either way: one 10 g scoop into 300-400 ml of cold water, each morning. Many people take theirs alongside breakfast.
Is Hoola's vitamin K2 suitable for vegans and vegetarians?
Yes. Hoola is vegan, with no sugar, gluten free, naturally flavoured and no artificial fillers. We use Vitashine vegan vitamin D3 and Lyc-O-Beta plant-source beta-carotene alongside the menaquinone 7.
Scoop. Sip. Shine. Repeat. See what's in Hoola or read more from us.
Always read the label and follow directions for use.
