Vitamin D3 Supplement (5,000 IU)
Vitamin D3 Supplement (5,000 IU)
A focused, high-potency Vitamin D3 supplement built to support bone strength, immune function, and overall wellness. One capsule delivers 5,000 IU of cholecalciferol (the form your body uses most efficiently) with clean, minimal ingredients and nothing unnecessary. Designed for daily use, especially for people with limited sun exposure, indoor lifestyles, or increased vitamin D needs.
Made in USA | Vegetarian-Friendly | Free of Common Allergens
$20.00
Vitamin D3 for Targeted Daily Support
Vitamin D plays a critical role in how your body absorbs calcium, responds to infections, repairs muscle tissue, and maintains energy. Despite all of that, deficiency is remarkably common. The National Institutes of Health estimates that roughly 25% of American adults have levels below the threshold for adequacy, and the number climbs higher for people who live in northern climates, work indoors, have darker skin tones, or are over 50.
Vitamin Armor Vitamin D3 delivers a focused, high-potency dose of cholecalciferol, the same form of vitamin D your skin produces from sunlight, and the form research consistently shows is more effective at raising and maintaining blood levels than D2. This is a single-ingredient formula designed to do one thing well: give your body the vitamin D it needs without unnecessary complexity.
Supplement Facts
Serving Size: 1 capsule
Servings Per Container: 60
Vitamin D (as Cholecalciferol) 125 mcg (5,000 IU) ….. 625% Daily Value
Other Ingredients: Microcrystalline Cellulose, Cellulose (Capsule), Magnesium Stearate.
This is a well-established daily dose for adults looking to maintain or improve their vitamin D status, and it falls within the range commonly recommended by healthcare professionals for people with insufficient levels.
Important Notice
Consult your healthcare provider before use if you are pregnant, nursing, have a medical condition, or are taking medications.
What Vitamin D3 Helps Support
Vitamin D3 contributes to several essential functions that affect how you feel and perform on a daily basis. It is critical for calcium absorption and bone mineral density, which matters for everyone but especially for athletes, active adults, and older individuals at risk for bone loss. It plays a direct role in immune system regulation, helping your body fight infections while keeping overactive immune responses in check. It supports muscle function and recovery, with research linking adequate levels to improved strength and faster recovery times. And it influences mood and energy, with low levels commonly associated with seasonal fatigue and low motivation.
If you want to understand the research behind vitamin D and athletic performance in more detail, our Vitamins for Athletes page covers how it fits into an active lifestyle.
Designed to Work With Your Daily Routine
Vitamin D needs vary widely from person to person, depending on factors like sun exposure, geographic location, skin tone, body weight, and baseline blood levels. That is exactly why this product exists as a standalone supplement rather than being buried inside a multivitamin formula at a fixed dose that may not be right for everyone.
Vitamin Armor D3 can be taken on its own or paired with Vitamin100 Multivitamin for more complete daily coverage. The two products were specifically formulated to complement each other. Vitamin100 provides 100% of the Daily Value for essential vitamins and minerals, while D3 adds focused vitamin D support at a dose that is meaningful for people who need more than what a standard multivitamin provides. There is no ingredient overlap between the two, so you are not doubling up on anything or creating absorption conflicts.
Clean, Focused Formula
Vitamin Armor Vitamin D3 is made with clarity and simplicity in mind. The D3 in this product is derived from lanolin, a natural substance sourced from sheep’s wool. This makes the product vegetarian-friendly and non-fish-sourced, though it is not vegan. (If you are looking for a fully vegan option, Vitamin100 Multivitamin is formulated without any animal-derived ingredients.)
The formula contains no artificial colors or flavors. It is free from wheat, milk, casein, peanuts, tree nuts, shellfish, dairy, lactose, soy, sugar, gluten, and eggs. There are no proprietary blends and no unnecessary fillers. What is on the label is what is in the bottle.
Suggested Use
Take one capsule daily with a meal, or as directed by your healthcare professional. Because vitamin D is fat-soluble, taking it with food that contains some dietary fat can improve absorption.
Blood testing is the most reliable way to determine your individual vitamin D needs. A 25-hydroxy vitamin D test (available through most doctors as part of routine bloodwork) will show you exactly where your levels stand and help you and your provider determine the right dose. For more on dosing and safety, visit our FAQs page.
Formulation & Manufacturing Standards
Formulated by Dr. Kurt Datz, DO, a board-certified internal medicine physician at Bismarck Health Center in Bismarck, North Dakota. Dr. Datz brings over 20 years of clinical experience and a focus on clean, evidence-based supplementation.
Manufactured in the USA with globally sourced ingredients in a GMP-certified, FDA-registered facility.
Vitamin D3 (5,000 IU) – Frequently Asked Questions
What is Vitamin D3 and why is it important?
Vitamin D3 (cholecalciferol) is a fat-soluble vitamin that helps the body absorb calcium and supports bone strength, immune function, and muscle health. It is commonly called the “sunshine vitamin” because the body produces it when skin is exposed to sunlight. The problem is that most people do not get enough sun exposure to maintain adequate levels year-round, especially during fall and winter months or if they spend most of their time indoors. That is where supplementation comes in.
Who should consider taking a 5,000 IU Vitamin D3 supplement?
A 5,000 IU dose is commonly used by adults who have tested low on a vitamin D blood test, people who live in northern climates with limited winter sun, individuals who spend most of their day indoors, people with darker skin tones (which naturally produce less vitamin D from sunlight), and athletes or active adults with higher recovery demands. If you are not sure whether this dose is right for you, a simple blood test and a conversation with your healthcare provider can help you decide.
How often should I take Vitamin Armor Vitamin D3?
One capsule daily with a meal is the standard recommendation. Taking it with food that contains some fat can help with absorption since vitamin D is fat-soluble. Unless your healthcare provider directs otherwise, one capsule per day provides 5,000 IU (125 mcg), which is a well-established maintenance dose for adults.
Is this Vitamin D3 supplement safe to take daily?
Vitamin D3 is generally safe when taken as directed. Because it is fat-soluble, it is stored in the body rather than excreted like water-soluble vitamins, which means long-term use at very high doses should be guided by periodic blood testing and professional medical advice. At 5,000 IU per day, this falls within the range commonly recommended by healthcare professionals for adults with insufficient levels. If you are pregnant, nursing, or taking medications, consult your physician before starting any supplement.
Can I take Vitamin D3 with Vitamin100 Multivitamin?
Yes, and they were designed to be taken together. Vitamin100 provides a complete daily nutritional foundation with 100% of the Daily Value for essential vitamins and minerals. Vitamin D3 adds focused, higher-dose vitamin D support for people who need more than what a standard multivitamin includes. The two formulas do not overlap, so you are not doubling up on any ingredients. You can learn more about how the products work together on our store page.
How do I know if I need a vitamin D supplement?
The most reliable way is a blood test. Your doctor can order a 25-hydroxy vitamin D test, which is the standard measurement for vitamin D status. Levels below 20 ng/mL are considered deficient, 20 to 30 ng/mL are insufficient, and most experts recommend maintaining levels above 30 ng/mL. If you are experiencing symptoms like persistent fatigue, bone or joint aches, frequent illness, or seasonal mood changes, those can also be signals worth investigating.
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