Happy Bones Vitamin D3 5000iu + K2

  • Calcium (As Calcium Carbonate) 210mg
  • Vitamin D3 (Cholecalciferol) 125mg
  • Vitamin K2 (mk-7) 100mcg
  • BioPerine (Black Pepper Fruit Extract) 5mg

Inactive Ingredients: Cellulose (Vegetable Capsule).


(5 customer reviews)
Vitamin D3 + K2 is one of our core supplements, which aim to improve health by addressing common nutritional deficiencies.

Healthy Bones & Immune System

Vitamin D has two well-known functions: It helps with proper calcium absorption which is essential for strong bones, and it is important for a healthy immune system. But it also influences over 200 genes in your body.

Vitamin D deficiency is associated with:

  • Impaired immune system
  • Respiratory infections including influenza
  • Mood and cognitive disorders including depression
  • Autoimmune disorders like diabetes and even cancer
  • Increase fall and fracture risk
  • Pre-menstrual syndrome
  • Muscle weakness

Vitamin D Deficiency Is An Epidemic

Over 40% of people in the United States are deficient in vitamin D, and over 80% of African Americans.

Although vitamin D deficiency can affect anybody, it is even more common in people who are over 65, have darker skin, are overweight, or have lower exposure to the sun either because of where they live, or because they don’t go outside much.

Although yourbody makes vitamin D3 from exposure to sunlight on the skin, and from foods such as egg yolk or oily fish, many people’s diet or lifestyle means they are not making enough.

Why Do I Need 5000iu of Vitamin D?

If you are deficient in vitamin D, then the lower doses often prescribed (e.g. 400iu) will do very little for you. 

4000-5000iu is the ‘sweet spot’ that gets most people up to a healthy level within 3 months, regardless what your current levels are, but without being too much.

Studies have shown that even 10,000iu per day is safe and non-toxic for most people. So 5000iu also works well as a maintenance dose, especially if you don’t get plenty of sun exposure.


Why You NEED Vitamin K2 Too

It’s very important to make sure the calcium your body absorbs goes to the right place. Namely your bones, and not the arteries and soft tissues.

So taking vitamin D without K2 can actually cause more harm than good.

Taking vitamin D3 with K2 together has been shown to significantly increase bone density in postmenopausal women, who are the people at higher risk of osteoporosis. As well as shuttling calcium to the right place, K2 also helps promote protein synthesis within bone.

Women Need Vitamin D3

Pre-menstrual syndrome in younger women is associated with vitamin D deficiency. And over half of American women receiving therapy to treat or prevent osteoporosis are vitamin D deficient. Women 65 and over with darker skin are especially likely to be deficient.

Especially Important For Older People

Men and women 65 and over need enough vitamin D as it helps prevent osteoporosis, falls and fractures. Many people in this age group are deficient in vitamin D, and increasing their vitamin D intake can have a significant effect on their overall physical and mental well-being.

Vitamin D3 not D2

Vitamin D3 (cholecalciferol) is the form made by the body when skin interacts with sunlight. Studies have shown D3 is better than D2 at raising blood levels, and lasts longer. Some supplements contain D2 as it is easier to manufacture.

Get Your Levels Checked

Scientists now state that healthy vitamin D serum levels are between 40-60 ng/mL (100-150 Nmol/L), which is higher than previously thought. This means many people are told their levels are ok, when in fact they are deficient. A simple blood test can tell you what your current levels are.

Vitamin D3 5000iu with K2 + Calcium

Many vitamin D supplements do not contain enough D3 to effectively increase blood levels in people who are deficient, which is a vast number of the population. Or they contain the inferior D2 type. And others do not also contain vitamin K2, which is essential for ensuring that calcium goes into your bones, and not the arteries.

Our Happy Bones Formula combines vitamin both D3 in a high enough strength to correct deficiency whilst still being safe. Alongside vitamin K2 and added calcium, to give your body a head start with calcium absorption.

Quality Tested


Backed By Our Happiness Guarantee!

Our aim is to make all our customers happy. We are the Happy Back Company, after all 🙂

So if you’re ever unsatisfied with any of our products, you can try them out for a full 90 days, and return any unused portion for a full refund.

Order today and give it a go. If you don’t notice your joints feeling happier, just let us know you weren’t satisfied and we’ll refund 100% of your order.

We’re so confident you’ll feel the difference!


Directions: Take 1 capsule twice a day, morning & evening.

5 reviews for Happy Bones Vitamin D3 5000iu + K2

  1. Andrew Swaine

    The vitamin D really helped me and there was excellent customer service.

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  2. Paula Wright

    My bones were really aching before taking this supplement, and since taking it the aches have completely gone. Also the professionalism and client care is great from this company. I would wholeheartedly recommend them.

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  3. Tim Tredgold

    Excellent! Felt better in days!

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  4. Gaynor Murphy

    Helped my aching bones immeasurably.

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  5. Harriett Wright

    This has boosted my immune system, I have had no colds/flu since taking this supplement and i’m used to 5 a year.

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Medical Information

You should consult your doctor before starting any health regimen, but especially if you have any underlying conditions such as kidney or liver impairment, kidney stones, cardiac arrhythmia, hyperparathyroidism, hypercalcaemia, or if you are receiving cancer treatment; or if you are taking medications for your heart, cholesterol or blood pressure, such as atorvastatin or thiazide diuretics.

Whilst we hope our products can help a lot of people, none of our products claim to cure or treat any specific disease, and any supplement you choose to take you do so at your own risk. The information on this website is not intended to be a substitute for professional medical advice and should not be relied on as health or personal advice.