
Vitamin D3 K2
by Optimal Nutrients
Key Benefits
- Supports Bone Health
- Promotes Cardiovascular Health
- Boosts Immune Function
- May help improve mood
💰Pricing
Product Overview
Vitamin D3 K2: The Dynamic Duo for Health
Are you looking to support your bone health, boost your immune system, and promote cardiovascular wellness? Vitamin D3 and K2 are two essential nutrients that work synergistically to achieve these goals. But what exactly do they do, and why are they so important?
What is Vitamin D3?
Vitamin D3, also known as cholecalciferol, is a fat-soluble vitamin produced in your skin when exposed to sunlight. It plays a crucial role in calcium absorption, bone mineralization, and immune function. Vitamin D3 deficiency is common, especially in regions with limited sunlight or among individuals with certain health conditions.
What is Vitamin K2?
Vitamin K2, specifically Menaquinone-7 (MK-7), is another fat-soluble vitamin that is essential for directing calcium to the bones and teeth. It helps prevent calcium from accumulating in the arteries, where it can contribute to cardiovascular problems. Unlike Vitamin K1 which primarily supports blood clotting, Vitamin K2 is key for bone and cardiovascular health.
Why Take Vitamin D3 and K2 Together?
Taking Vitamin D3 and K2 together is more effective than taking either nutrient alone. Vitamin D3 helps increase calcium absorption, while Vitamin K2 ensures that the calcium is properly utilized and deposited in the bones, rather than accumulating in the arteries. This synergistic effect promotes optimal bone and cardiovascular health.
Who Should Consider Taking This Supplement?
- Individuals with Vitamin D deficiency
- People at risk of osteoporosis
- Those looking to support their immune system
- Individuals concerned about cardiovascular health
Always consult your doctor before starting any new supplement routine to make sure it is the best for your health.

How It Works
How Vitamin D3 K2 Works
Vitamin D3 increases calcium absorption in the gut and regulates calcium levels in the blood. Vitamin K2 activates proteins like osteocalcin, which helps deposit calcium into the bones and teeth. It also activates matrix GLA protein (MGP), which inhibits calcium from depositing in the arteries and other soft tissues.
The synergistic action of Vitamin D3 and K2 ensures that calcium is utilized effectively for bone health while preventing cardiovascular issues related to calcium accumulation.

Benefits & Research
Benefits of Vitamin D3 K2
- Supports Bone Health: Promotes calcium absorption and bone mineralization.
- Promotes Cardiovascular Health: Helps prevent arterial calcification.
- Boosts Immune Function: Enhances immune cell activity.
- Improves Mood: May help alleviate symptoms of depression and anxiety.
- Supports Muscle Function: Contributes to muscle strength and function.
- Enhances Calcium Absorption: Vitamin D3 increases the absorption of calcium in the gut.
- Proper Calcium Utilization: Vitamin K2 ensures that calcium is deposited in the right places, like bones and teeth.
- Prevents Calcium Build-Up: Reduces the risk of calcium accumulating in arteries and soft tissues.

Potential Side Effects
Potential Side Effects
Vitamin D3 and K2 are generally considered safe when taken at recommended dosages. However, some individuals may experience side effects such as:
- Nausea
- Constipation
- Abdominal pain
- Hypercalcemia (excessive calcium levels in the blood) - rare, but more likely with very high doses of Vitamin D3
It's essential to stick to the recommended dosage and consult with a healthcare provider if you experience any adverse effects.

Frequently Asked Questions
What is the best time to take Vitamin D3 K2?
The best time to take Vitamin D3 K2 is with a meal containing fat, as both vitamins are fat-soluble and absorption is enhanced when taken with dietary fats. Usually at lunchtime or dinner time is recommended.
Can I take Vitamin D3 K2 if I am already taking a multivitamin?
Check the label of your multivitamin to see if it already contains Vitamin D3 and K2. If it does, ensure that the combined dosage doesn't exceed the recommended daily intake. If you are unsure, consult with a healthcare professional.
Is it safe to take Vitamin D3 K2 during pregnancy?
Consult with your doctor or a qualified healthcare professional before taking Vitamin D3 K2 during pregnancy. While both vitamins are essential, proper dosage is crucial during pregnancy.
How long does it take to see results from taking Vitamin D3 K2?
Results may vary depending on individual factors such as age, health status, and existing vitamin deficiencies. Some people may notice improvements in energy levels and mood within a few weeks, while others may take several months to see noticeable effects on bone health.
Can Vitamin D3 K2 interact with medications?
Vitamin D3 can interact with certain medications, such as corticosteroids and some weight-loss drugs. Vitamin K2 can interact with blood thinners like Warfarin. Consult with a healthcare professional to discuss potential interactions.
What is the ideal dosage of Vitamin D3 and K2?
The ideal dosage varies depending on individual needs and health status. A common recommendation is 5000 IU of Vitamin D3 and 100 mcg of Vitamin K2 per day. However, it is best to consult with a healthcare provider to determine the appropriate dosage for you.
Can you get too much Vitamin D or K?
Yes, it is possible to get too much Vitamin D, which can lead to hypercalcemia (high calcium levels in the blood). Extremely high doses of vitamin K2 are generally well-tolerated, but it is important to stick to recommended dosages.
Detailed Scores & Effectiveness
Product Scores
Effectiveness by Goal
Customer Reviews (6)
Great for Bone Health!
I've been taking this Vitamin D3 K2 supplement for 6 months, and my recent bone density scan showed significant improvement. Highly recommend!
Good Quality Supplement
I appreciate the combination of D3 and K2 in one capsule. It's convenient and seems to be working well. No noticeable side effects.
Noticeable Energy Boost
Since starting this supplement, I've noticed a significant increase in my energy levels. I also feel like my immune system is stronger.
Easy to Swallow
The capsules are small and easy to swallow. I like that they are made with organic olive oil for better absorption.
Third party tested
I like that the product is 3rd party tested and from a GMP certified facility. Safety is my main concern when picking a supplement and this checks the boxes.
Too high of dose for me
This is a great product and I like that it contains both D3 and K2. However, it has a very high dose of D3 so I would only recommend this for those who have a known deficiency
Product Specs
Key Ingredients
Vitamin D3 (Cholecalciferol)
Grade AVitamin K2 (Menaquinone-7)
Grade BOrganic Olive Oil
Grade N/AHypromellose (capsule)
Grade N/ACertifications
Important Warnings
- • Consult with a healthcare professional before use if you are pregnant, nursing, taking medication, or have a medical condition.
- • Keep out of reach of children.
- • Do not exceed recommended dosage.