Vitamin D3 & K2

Two vitamins, two distinct roles

Vitamin D3 is also called cholecalciferol. Vitamin K2 refers to menaquinones, including the MK-7 form named in our dedicated products. Both belong to the fat-soluble vitamin family.

Vitamin D helps the body absorb calcium. Vitamin K is involved in normal blood clotting and bone health. Combining them in one formula offers convenience, while each vitamin still has its own amount and suitability considerations.

• D3 ingredient nameCholecalciferol
• K2 form in dedicated productsMenaquinone-7 (MK-7)
• D3 label unitsMicrograms and IU
• K2 label unitsMicrograms

Food sources and ingredient origins

Oily fish and some fortified foods provide vitamin D. The body also makes vitamin D through sunlight exposure, although production varies with circumstances. Food sources and supplement origins are separate questions.

Vitamin K occurs in different forms across foods. The label K2 is more specific than a general reference to vitamin K. When choosing a supplement, look for the declared form rather than assuming a food source and a bottled formula are identical.

Our dedicated D3/K2 spray and pipette descriptions state that their vitamins are plant-derived. The spray also names sunflower-derived phospholipids. For a full ingredient declaration or the precise source material, ask us for the current panel rather than inferring it from the word plant-derived.

Understanding micrograms and IU

“mcg” and “µg” both mean micrograms. For vitamin D, 1 microgram equals 40 international units (IU), so 25 micrograms equals 1,000 IU and 50 micrograms equals 2,000 IU. These are equivalent ways of expressing the same vitamin D amount.

This conversion is specific to vitamin D. Read the K2 amount separately in micrograms. A large IU figure and a smaller microgram figure cannot be compared as if they describe the same nutrient.

Next check what the amount applies to: one spray, half a millilitre, a full millilitre or the recommended daily serving. A pipette marking measures liquid volume, and a product title may describe a multi-spray serving. Use the bottle directions to put the numbers in context.

D3 and K2 in our range

Choosing a format that fits your routine

A spray is measured by its specified number of sprays, while a pipette liquid is measured by the marked volume. Choose the method you can measure consistently, and keep the nozzle or pipette clean.

“Liposomal” describes a formulation approach involving phospholipids. It does not tell you the vitamin quantities, establish a universal serving or make the different products interchangeable.

Before adding a combined formula, check other supplements for D3 or K2 already present. Record the total labelled amounts across the daily servings. If you are changing products, compare both labels instead of carrying over the same number of sprays or drops.

Use, storage and individual suitability

Follow the current label, including any instructions for shaking, priming the spray or mixing a measured liquid serving. Keep the cap secure and use the stated storage and use-after-opening directions. Retain the original batch and best-before information.

Do not increase vitamin D simply because a higher-strength option is available. Excess supplemental vitamin D can be harmful. A combined K2 ingredient is not a reason to exceed the vitamin D directions.

If you take warfarin or a similar vitamin K antagonist, speak with your prescriber or anticoagulation team before starting or changing a K-containing supplement. Keep vitamin K intake consistent with their advice.

For help with a current ingredient panel or serving label, contact our team. Individual suitability questions belong with a qualified practitioner who knows your circumstances.

D3 and K2 questions answered

Explore related ingredients

Continue with vitamin C, magnesium, zinc and selenium, or browse the Learn ingredient library.