How to Read Vitamin D3 and K2 Supplement Labels
Sep
Product-label images and health references checked in September 2026
A vitamin D3 and K2 supplement label may show D3 in IU, K2 in micrograms, and a serving size of one, two or three softgels. Those numbers are easy to misread if you compare the front of one pack with the Supplement Facts panel of another. This guide explains IU, mcg and MK-7, then compares six D3 + K2 labels available through Be Healthy BD in Bangladesh. It is a guide to reading labels, not a recommendation to take a particular strength.
Quick answer
Read the serving size first. For vitamin D, 1 mcg = 40 IU, so 125 mcg is 5,000 IU, 250 mcg is 10,000 IU, and 500 mcg is 20,000 IU. Then check whether K2 is MK-7, MK-4 or a combination, and whether magnesium, zinc or calcium is also included. These are amounts per label serving, not suggested amounts for you to take.
What do vitamin D3 and K2 mean on a supplement label?
Vitamin D3, or cholecalciferol, is a form of vitamin D. Vitamin D helps the body absorb calcium and supports normal bone mineralization. Vitamin K2 belongs to a family of vitamin K compounds called menaquinones. Vitamin K is needed for normal blood clotting and has a role in bone metabolism. A combination label tells you what the product contains; it does not prove the product will treat a condition or suit everyone.
The NIH vitamin D fact sheet and NIH vitamin K fact sheet describe the nutrients and their dietary supplement forms. On a product, start with the Supplement Facts panel and read every nutrient amount per serving.
Vitamin D IU versus mcg: how to read the numbers
Vitamin D labels may show international units (IU), micrograms (mcg), or both. The vitamin D conversion is 1 mcg = 40 IU. Divide IU by 40 to find mcg, or multiply mcg by 40 to find IU. For example, 5,000 IU ÷ 40 = 125 mcg. This conversion is specific to vitamin D; do not use it to convert the K2 amount.
| Vitamin D on label | Equivalent amount | Example in this comparison |
|---|---|---|
| 5,000 IU | 125 mcg | Horbaach and Bronson, each per one label serving |
| 10,000 IU | 250 mcg | Micro Ingredients, Carlyle and VEV, but their serving sizes differ |
| 20,000 IU | 500 mcg | Nextdia D3 + K2 + Calcium, per one softgel |
The NIH reference confirms the conversion. The U.S. label’s percent Daily Value is a standardized labeling reference, not a personal target or permission to take a high-strength product regularly.
What are K2 MK-7 and MK-4?
Vitamin K1 is called phylloquinone. Vitamin K2 is a group of menaquinones whose names include MK-4 and MK-7. These are forms, not strength grades. NIH notes that several vitamin K forms appear in supplements and that evidence on their relative bioavailability remains limited. Do not assume MK-7 is automatically the best choice for every person.
Five of the six supplied product panels identify K2 as MK-7. The corrected Nextdia D3 + K2 + Calcium panel declares a 200 mcg vitamin K2 complex containing MK-4 and MK-7. It does not break down that 200 mcg into separate MK-4 and MK-7 quantities, so an exact MK-7-only comparison with the other five cannot be made. See the NIH vitamin K guide for background on the forms.
One, two or three softgels: why serving size matters
A number in Supplement Facts applies to the serving printed at the top of that panel. In these supplied labels, Micro Ingredients shows 10,000 IU D3 for one softgel; Carlyle shows 10,000 IU for two softgels; and VEV shows 10,000 IU for three softgels. The per-serving D3 number matches, but the number of softgels does not.
Dividing a declared serving amount by its softgel count can help compare labels: Carlyle works out to 5,000 IU D3 and 100 mcg K2 per softgel; VEV works out to approximately 3,333 IU D3 and 66.7 mcg K2 per softgel. These are calculated comparisons, not separately declared per-softgel label amounts or advice to alter a serving. Read the directions and discuss appropriate use with a qualified clinician, particularly for higher-strength D3.
The simple label rule
Compare serving size → vitamin D3 IU and mcg → K2 amount and form → added ingredients → directions and warnings. A 300-softgel pack is not automatically 300 label servings: Carlyle has 150 two-softgel servings, and VEV has 100 three-softgel servings.
Six vitamin D3 and K2 supplement labels compared
The figures below were transcribed from the product-label images supplied for this guide. They describe one label serving of each product, not a recommended daily intake or a ranking. Formulas and availability can change; check the current pack.
| Product | Label serving | Vitamin D3 per serving | K2 and other declared nutrients |
|---|---|---|---|
| Micro Ingredients D3 + K2 – 300 softgels | 1 softgel 300 label servings |
250 mcg (10,000 IU) | K2: 200 mcg as MK-7. |
| Horbaach K2 MK-7 + D3 – 180 softgels | 1 softgel 180 label servings |
125 mcg (5,000 IU) | K2: 100 mcg as MK-7. |
| VEV Corefeel D3 + K2 + Magnesium – 300 softgels | 3 softgels 100 label servings |
250 mcg (10,000 IU) | K2: 200 mcg as MK-7; magnesium: 90 mg; zinc: 10 mg. |
| Carlyle K2 + D3 – 300 softgels | 2 softgels 150 label servings |
250 mcg (10,000 IU) | K2: 200 mcg as MK-7. |
| Bronson K2 + D3 – 120 capsules | 1 capsule 120 label servings |
125 mcg (5,000 IU) | K2: 125 mcg as MK-7. |
| Nextdia D3 + K2 + Calcium – 120 softgels | 1 softgel 120 label servings |
500 mcg (20,000 IU) | K2 complex: 200 mcg as MK-4 and MK-7 combined; calcium: 200 mg as calcium citrate. Individual MK-4/MK-7 amounts not declared. |
Nextdia correction: This is the version with calcium. Its supplied front image and Supplement Facts panel both identify calcium; the 200 mg is declared per one softgel. Do not substitute the earlier D3 + K2 product page or image without calcium.
Browse vitamin supplements at Be Healthy BD to check current product availability, pack sizes and labels.
Check added magnesium, zinc, calcium and oils
VEV’s three-softgel serving also declares 90 mg magnesium from magnesium glycinate and malate, plus 10 mg zinc. Nextdia’s one-softgel serving declares 200 mg calcium as calcium citrate. These are specific nutrient amounts, not the weight of the whole compound or a reason to assume either product meets a person’s full mineral needs.
The softgel ingredient lists also matter. Some supplied labels mention olive or coconut oil, gelatin or other shell ingredients. If you have an allergy or follow a vegetarian, halal or other dietary rule, check the current full pack and any relevant certification rather than judging from “D3 + K2” on the front.
A practical D3 + K2 label checklist
- Find Serving Size: Is the panel for one, two or three softgels or capsules?
- Read D3 in both units: 5,000 IU = 125 mcg; 10,000 IU = 250 mcg; 20,000 IU = 500 mcg.
- Identify K2: Record the mcg amount and whether it is MK-7, MK-4 or a combined complex.
- Look for additions: Check magnesium, zinc, calcium and any oils or other ingredients.
- Check pack and directions: Softgel count, label servings and directions are separate pieces of information.
- Consider other sources: Include vitamin D, vitamin K and calcium from other supplements when discussing your total intake with a clinician.
- Check the pack you receive: Confirm the seal, expiry, current formula and storage instructions.
Higher-strength D3 and medication safety
Before using these products
This article is general education, not medical advice or an individualized dosing schedule. The NIH lists 4,000 IU (100 mcg) per day as the vitamin D tolerable upper intake level for adults under ordinary circumstances. Every label serving in this comparison exceeds that level. A clinician may recommend a different regimen for a specific situation, but the number on a bottle does not establish that daily use is appropriate for you. Ask a doctor or pharmacist about your total intake, planned frequency and any monitoring before using a higher-strength product.
Calcium and vitamin D: Excess vitamin D can raise blood calcium; the NIH notes additional considerations when calcium supplements are combined with vitamin D. This is especially relevant to the corrected Nextdia D3 + K2 + Calcium formula and to anyone already using another calcium or vitamin D supplement.
Warfarin and similar anticoagulants: Vitamin K can interfere with these medicines. Do not start, stop or change a K2 supplement without talking to the prescribing clinician; consistent vitamin K intake matters. See the NIH vitamin K medication guidance.
If you are pregnant, breastfeeding, managing a medical condition or choosing a product for a child, seek individualized professional advice. Check medication and ingredient interactions before purchase or use.
Frequently asked questions
What does 10,000 IU mean in mcg for vitamin D3?
It means 250 mcg of vitamin D3, because 1 mcg equals 40 IU. Check the serving size: the 10,000 IU is per one Micro Ingredients softgel, two Carlyle softgels or three VEV softgels on the supplied labels.
Does 200 mcg of K2 mean 200 mcg of MK-7?
Only if the panel identifies the entire 200 mcg as MK-7. Nextdia lists a 200 mcg K2 complex containing MK-4 and MK-7 but does not specify each amount, so its MK-7 amount alone is not declared.
Is 20,000 IU D3 better than 5,000 IU?
A larger label amount is not automatically better. The right amount and frequency depend on the person and reason for use. Nextdia’s 20,000 IU is per one softgel and is well above the general adult daily upper intake level; seek professional guidance before use.
Does a 300-softgel pack contain 300 servings?
Not always. Micro Ingredients lists one softgel per serving, so 300 softgels equal 300 label servings. Carlyle lists two, giving 150 label servings; VEV lists three, giving 100. Label servings are not automatically the number of days you should take a product.
Can I take D3 + K2 while taking warfarin?
Do not change your vitamin K intake without the clinician managing your anticoagulant treatment. Vitamin K can affect warfarin and similar medicines, and a change may require medical review or monitoring.
Which of these products contains calcium or magnesium?
On the supplied panels, Nextdia D3 + K2 + Calcium declares 200 mg calcium per one softgel. VEV D3 + K2 + Magnesium declares 90 mg magnesium and 10 mg zinc per three softgels. Compare the full ingredients and serving sizes on your current pack.
About this comparison
The figures were transcribed from six supplied product-label references in September 2026, including the corrected Nextdia formula with calcium and a separately supplied VEV Supplement Facts image. Product packaging and availability may change. General nutrient and safety information is linked to the NIH Office of Dietary Supplements alongside the relevant sections. This guide does not independently test the products or recommend a personal dose.