VitBoost's vitamin D range includes more than one strength. The core products include a 5,000 IU D3 + K2 formula, a 10,000 IU D3 + K2 complex with added nutrients, and a 50,000 IU D3 capsule labeled for once-weekly use. VitBoost also offers an 8-in-1 Immune Support blend containing vitamin D3 in 60- and 120-capsule bottle sizes.
These products differ in dose, ingredients, capsule count and intended schedule. This guide compares every D3-containing variant supplied in the product resources so you can identify the right questions to discuss with a healthcare professional.
Important: The 5,000 IU and 10,000 IU strengths exceed the adult tolerable upper intake level of 4,000 IU per day if taken daily. The 50,000 IU product is labeled once weekly and should not be treated as a daily capsule. Higher doses may be used under medical supervision, but this article does not provide a personal dosing plan.
NIH Office of Dietary Supplements: Vitamin D
VitBoost Vitamin D3 variants at a glance
|
Product |
Vitamin D3 per listed serving |
Other active ingredients |
Bottle size |
|
5,000 IU / 125 mcg |
K2 MK-7, 90 mcg |
120 capsules |
|
|
10,000 IU / 250 mcg |
K2, B12, C, magnesium, zinc, black pepper extract |
120 vegetable capsules |
|
|
50,000 IU / 1,250 mcg |
No K2 listed as an active ingredient |
60 veggie capsules |
|
|
Listing title states vitamin D3 5,000 IU plus a blend |
Vitamin C, zinc, elderberry, echinacea, ginger, turmeric and ashwagandha |
60 or 120 capsules |
What does vitamin D3 do?
Vitamin D helps the body absorb calcium and supports bones, muscles and immune function. D3, also called cholecalciferol, is a form used in supplements. These roles explain why vitamin D matters, but they do not mean everyone needs a high-dose product.
The NIH lists 4,000 IU per day as the adult tolerable upper intake level from food, beverages and supplements combined. This is a safety limit, not a daily target. A clinician may recommend a higher amount for a defined period when treating deficiency or another clinical need.
NIH Office of Dietary Supplements: Vitamin D
1. VitBoost D3 + K2 5,000 IU
View the VitBoost D3 + K2 5,000 IU product listing.
This is the simpler D3-and-K2 combination in the core range. The supplied listing identifies 5,000 IU, or 125 mcg, of vitamin D3 and 90 mcg of vitamin K2 as MK-7 per listed serving.
Product details:
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5,000 IU / 125 mcg vitamin D3
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90 mcg vitamin K2, as MK-7
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120 capsules
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Non-GMO, gluten-free and sugar-free positioning
Its main difference is the two-nutrient formula. It does not add the B12, vitamin C, magnesium, zinc and black pepper extract listed in the 10,000 IU complex.
The presence of K2 does not automatically make a high-dose D3 product appropriate for everyone. If you take warfarin or another vitamin K antagonist, speak with your prescribing clinician before adding, stopping or changing a K2 supplement.
NIH Office of Dietary Supplements: Vitamin K
2. VitBoost D3 + K2 10,000 IU Complex
View the VitBoost 10,000 IU D3 + K2 complex and label information.
The 10,000 IU complex changes both the vitamin D3 strength and the rest of the formula. Its displayed Supplement Facts panel lists the following amounts per one-capsule serving:
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Vitamin D3: 10,000 IU, or 250 mcg
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Vitamin K2: 120 mcg, as MK-7
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Vitamin B12: 140 mcg, as methylcobalamin
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Vitamin C: 45 mg
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Magnesium: 50 mg, from magnesium oxide and magnesium citrate
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Zinc: 5 mg, from zinc oxide
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Black pepper extract: 5 mg
The bottle contains 120 vegetable capsules. The displayed other ingredients include microcrystalline cellulose and magnesium stearate.
This formula may be relevant to someone whose healthcare professional has recommended the included nutrients together, but it also creates more potential overlap with other supplements. Check your multivitamin, B12, magnesium, zinc and immune-support products before combining them.
3. VitBoost Vitamin D3 50,000 IU Once Weekly
View the VitBoost Vitamin D3 50,000 IU product listing.
This is the D3-focused, high-potency option. The listing describes 50,000 IU, or 1,250 mcg, of vitamin D3 per capsule, a 60-veggie-capsule bottle and a once-weekly schedule.
Listed product features include:
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Non-GMO positioning
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Gluten-free positioning
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Vegetarian or veggie capsule
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No K2 listed as an active ingredient on the supplied product details
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Manufacturer-stated third-party lab testing
Use this strength only under a healthcare professional's supervision. The weekly wording does not establish the right dose, treatment length or monitoring plan for every person. Do not treat it as a daily capsule or switch between daily and weekly products without professional guidance.
For adults aged 50 and older who have an indication for vitamin D supplementation or treatment, the Endocrine Society suggests daily lower-dose vitamin D rather than intermittent higher doses. Your clinician should decide how that guidance applies to your circumstances.
Endocrine Society vitamin D guideline
4. VitBoost 8-in-1 Immune Support, 60- or 120-capsule options
View the 60-capsule VitBoost Immune Support formula or the 120-capsule option.
The VitBoost 8-in-1 Immune Support product is a related multicomponent formula rather than a D3-only product. It is available in 60- and 120-capsule bottle sizes. The supplied resource identifies vitamin D3 at 5,000 IU alongside vitamin C, zinc, elderberry, echinacea, ginger, turmeric and ashwagandha.
Because it includes several botanicals and nutrients, compare the full formula rather than looking only at the vitamin D amount. The supplied editorial note says the Immune Support pages contain conflicting serving-size wording, so confirm whether the listed amounts apply to one capsule, multiple capsules or the full serving before publishing.
A larger bottle does not automatically mean a stronger serving. Compare the current Supplement Facts panel, serving size and directions, regardless of which bottle size you choose. If you already use a multivitamin, D3 product or immune blend, include all labels in a medication and supplement review.
Does everyone need vitamin K2 with vitamin D3?
No. Vitamin K has roles in blood clotting and bone-related proteins, and MK-7 is one form of vitamin K2 used in supplements. Those functions do not establish that every person taking D3 needs a separate K2 product. Research on vitamin K supplementation and bone outcomes has limitations.
NIH Office of Dietary Supplements: Vitamin K
The 5,000 IU and 10,000 IU VitBoost formulas list K2. The 50,000 IU D3-only listing does not list K2 as an active ingredient. The Immune Support listings focus on D3 plus immune-related nutrients and botanicals.
If you take warfarin or another vitamin K antagonist, speak with your prescribing clinician before adding, stopping or changing a K2 supplement. Do not assume that adding K2 makes a high-dose D3 product appropriate for you.
How should you choose between the formulas?
Start with the amount and schedule a healthcare professional recommends. Then compare:
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Dose: 5,000 IU, 10,000 IU and 50,000 IU represent very different strengths.
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Schedule: The 50,000 IU product is labeled once weekly; do not convert it to daily use.
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Full formula: The 10,000 IU complex adds B12, vitamin C, magnesium, zinc and black pepper extract.
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K2 content: The two core combination formulas list K2; the D3-only product does not.
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Ingredient overlap: Check multivitamins, B12, magnesium, zinc, calcium and immune blends.
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Serving size: Confirm whether amounts apply to one capsule or a multi-capsule serving.
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Bottle count: Compare 60 and 120 capsules only after confirming the serving size and schedule.
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Documentation: If testing matters, ask the brand for a certificate of analysis for the relevant product and lot.
Key takeaways
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D3 + K2 5,000 IU: The simpler two-nutrient core formula with 90 mcg of MK-7 and 120 capsules.
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D3 + K2 10,000 IU complex: Adds B12, vitamin C, magnesium, zinc and black pepper extract to D3 and K2.
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D3 50,000 IU: The D3-focused option labeled once weekly in a 60-veggie-capsule bottle.
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Immune Support, 60 or 120 capsules: One 8-in-1 blend available in two bottle sizes, listing 5,000 IU of D3 alongside immune-related ingredients.
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Best choice: Match the complete formula, dose and schedule to your individual plan rather than choosing by IU count alone.
Frequently asked questions
Is 1,250 mcg the same as 50,000 IU of vitamin D3?
Yes. For vitamin D, 1 mcg equals 40 IU. Multiplying 1,250 mcg by 40 gives 50,000 IU. These are two unit descriptions of the same amount, not separate ingredients.
Is the 10,000 IU complex just a stronger version of the 5,000 IU product?
No. It also changes the formula. The listed K2 amount increases from 90 mcg to 120 mcg, and the complex adds B12, vitamin C, magnesium, zinc and black pepper extract. Review them as different formulations.
Does every VitBoost D3 product contain K2?
No. The 5,000 IU and 10,000 IU core products list K2. The 50,000 IU D3 listing does not list K2 as an active ingredient, and the Immune Support formulas should be checked against their current Supplement Facts panels.
Can I take two VitBoost D3 products together?
Do not combine them without professional guidance. Vitamin D from separate products adds to your total intake, and the 10,000 IU complex and Immune Support products may also overlap with other vitamins, minerals or botanicals. Have a clinician or pharmacist review the complete combination.
What is the difference between the 60- and 120-capsule Immune Support options?
They are two bottle-size options for the related 8-in-1 formula, not confirmed different strengths. Verify the current label and serving size because the product pages contain conflicting serving-size wording.
Is the 50,000 IU product intended for daily use?
The supplied product listing labels it once weekly. Do not take it daily or change between daily and weekly products unless a healthcare professional specifically directs you to do so.
This guide is educational and does not provide a personal dosing plan. Product pages, prices, serving instructions and labels may change. Medical review is recommended before publication.