Vitamin D has been shown to maintain bone health, balance mood, and support a healthy immune system. This article looks at the top 5 vitamin D supplements of 2025, considering factors like formulation, bioavailability, and clinically effective dosages.

​​When choosing a vitamin D supplement, keep these 5 key factors in mind: 

1. Features Vitamin D3 (not D2): Look for supplements containing vitamin D3 (cholecalciferol) rather than D2 (ergocalciferol). Vitamin D3 is the form naturally produced by your skin when exposed to sunlight and is more effective at raising and maintaining vitamin D levels in the body.

2. Includes Vitamin K2: The best vitamin D supplements for bone health often include vitamin K2. This nutrient works synergistically with vitamin D to ensure calcium is deposited in bones rather than accumulating in arteries and soft tissues.

3. Correct Clinical Dosage: Given that over 40% of Americans are deficient in vitamin D, clinical research supports a daily intake of 2,000 IU (50 mcg) for maintaining optimal D3 levels.* Always consult a healthcare professional to determine your ideal dosage based on individual factors.

4. Liquid Form: Liquid vitamin D supplements may offer better absorption compared to capsules or softgels. They're also easier to adjust dosage and are a good option for those who have difficulty swallowing pills.

5. Reputable Brand: When choosing a vitamin D supplement, look for brands that follow Good Manufacturing Practices (GMP), conduct independent third-party testing, and make their supplements in the USA.  

Healthy Dose of D3 (2,000 IU)

Only Available Online

Plus Vitamin K2 (200 mcg)

Easy-to-Take Liquid Form

Better Bone Health Support

Improved Calcium Absorption & Distribution

Enhanced Immune Function

Vegan, Gluten-Free, & Dairy Free

No Fillers or Artificial Ingredients

Optimal Bioavailability

30-Day Supply

Third-Party Tested

cGMP Compliant

Made in the USA with Global Ingredients

Affordable Pricing (+Bulk Discounts)

365-Day Money-Back Guarantee

NativePath’s Vitamin D3+K2 Supplement stands out in the market for several key reasons. First, it combines the perfect duo of 2,000 IU vitamin D3 and 200 mcg vitamin K2 per serving. This offers synergistic effects and unmatched support for your bones, muscles, heart, and calcium levels. We also love that this supplement comes in a liquid form suspended in organic MCT oil. This not only aids in faster absorption but also makes it easier to customize dosages. It’s also ideal for those who have difficulty swallowing pills. Last but not least, this D3+K2 combo is free from artificial additives and unnecessary fillers—ensuring you're getting a pure, high-quality supplement. Add that to NativePath’s affordable price (as low as $15 per tincture), and their 365-day money-back guarantee, and it’s easy to see why NativePath is our #1 choice.

Try it risk-free. No strings attached. 

“I have only been taking this product a short time but my recent Vitamin D test was greatly improved.”

—A.S., NativePath Verified Customer, 05/07/2024

Customer results have not been independently verified. Individual results may vary.

High Dose of D3 (5,000 IU)

Exceeds Daily Value of Vitamin D (625% DV)

Plant-Based Ingredients

Risk of Vitamin D3 Toxicity

Vegan Certified 

Less K2 Than Our #1 Pick

Soy-Free & Gluten-Free

Less Bioavailable Form (softgel instead of liquid)

Third-Party Tested

cGMP Compliant

Short Return Window (45 Days)

Sports Research D3 + K2 offers an extremely potent vitamin D formula—with one softgel containing 5,000 IU of vitamin D3. To put this in perspective, the tolerable upper intake level is typically set at 4,000 IU (100 mcg) per day. Exceeding this amount over time can lead to high levels of calcium in the blood, with symptoms like kidney stones, bone pain, nausea and vomiting, stomach pain, and more. Aside from the high dosage, we like that this supplement sources its vitamins from plants: the D3 is sourced from lichen, while the K2 comes from chickpeas. With these factors in mind, Sports Research dropped to #2 on our list of Best Vitamin D Supplements of 2025. 

Good for Those with Vitamin D Deficiency

Less Vitamin K2 Than Our #1 Pick

Extremely High Dose of D3 (10,000 IU)

Includes Vitamin K2

4 Month Supply

Risk of Vitamin D3 Toxicity

cGMP Compliant

Less Bioavailable Form (capsule instead of liquid)

Uses Magnesium Citrate (known for its laxative effects)

Short Return Window (30 days)

Dr. Berg was started by a board-certified chiropractor with over 30 years of experience. Despite his deep passion for simplifying health through supplements and educational resources, there wasn’t an explanation as to why this supplement combined the vitamins and minerals that it did… Not only does it contain an extremely high dose of D3 per serving (10,000 IU), but it also contains a whole slew of other vitamins and minerals including vitamin K2, B6, magnesium citrate, zinc, MCT powder, and oxbile powder. While it may be effective for those with a vitamin D deficiency, some customers have reported feelings of nausea, dizziness, and an upset stomach. That said, Dr. Berg’s D3 & K2 Vitamin comes in third on our list of Best Vitamin D Supplements of 2025.

*Important Note: Given the high dosage of vitamin D3 in this supplement (10,000 IU), regular monitoring becomes crucial. If you plan to use this product for an extended period, it's advisable to have your vitamin D levels tested every 3-6 months.

Good for Those with Vitamin D Deficiency

Exceeds Daily Value of Vitamin D (625% DV)

Risk of Vitamin D3 Toxicity

High Dose of D3 (5,000 IU)

Doesn’t Have Vitamin K2

Made with Organic Extra Virgin Olive Oil

Potential Risk for Arterial Hardening

Easy-to-Swallow Softgel

Less Effective for Bone & Heart Health

One Year Supply

Third-Party Tested

Not Vegan (due to gelatin softgels)

cGMP Compliant

Less Bioavailable Form (softgel instead of liquid)

Softgels Stick Together

Short Return Window (60 Days)

NatureWise's Vitamin D3 softgels deliver a potent 5,000 IU of vitamin D3 suspended in organic extra virgin olive oil for optimal absorption. Where this supplement fell short was its exclusion of vitamin K2—an essential vitamin for our bones and cardiovascular health. While vitamin D3 excels at boosting calcium absorption, it doesn’t have control over where that calcium ends up in the body. This is where vitamin K2 comes in: it ensures that calcium is deposited in the right places—in bones and teeth—rather than accumulating in arteries and soft tissues. Without K2, calcium may accumulate in the arteries over time, potentially leading to arterial hardening and the risk of cardiovascular issues like heart disease and stroke. All things considered, the high dosage of D3—plus the absence of K2—has resulted in NatureWise dropping to fourth on our list of Best Vitamin D Supplements of 2025.

*Important Note: Given the high dosage of vitamin D3 in this supplement (5,000 IU), regular monitoring becomes crucial. If you plan to use this product for an extended period, it's advisable to have your vitamin D levels tested every 3-6 months.

Good for Those with Vitamin D Deficiency

Exceeds Daily Value of Vitamin D (625% DV)

Risk of Vitamin D3 Toxicity

High Dose of D3 (5,000 IU)

Doesn’t Have Vitamin K2

23 Organic Fruits & Vegetables

Potential Risk for Arterial Hardening

Plus Live Probiotics & Enzymes

Vegetarian Capsules

Less Effective for Bone & Heart Health

60-Day Supply

Certified Carbonfree

Less Bioavailable Form (capsule instead of liquid)

Certified B Corp

Complaints of Stomach Pain

Gluten-Free, Non-GMO, & Kosher

Complaints of Digestive Issues

Short Return Window (60 Days)

Garden of Life’s Raw D3 capsules are an all-in-one supplement featuring 5,000 IU of vitamin D3 along with 37 organic fruits, vegetables, and probiotics. Although this brand takes pride in its inclusion of over two dozen raw nutrients, less is usually more when it comes to supplements. Such a long ingredient list often results in stomach pain or digestive issues—two complaints that have been frequently shared by Garden of Life customers. Just remember: a vitamin D supplement really only needs vitamin D3, K2, and maybe some magnesium. Since this Raw D3 supplement is on the opposite end of the spectrum, it came in last on our list.

*Important Note: Given the high dosage of vitamin D3 in this supplement (5,000 IU), regular monitoring becomes crucial. If you plan to use this product for an extended period, it's advisable to have your vitamin D levels tested every 3-6 months.

Always double-check the “Other Ingredients” section that’s directly underneath the Supplement Facts Panel on the back of a supplement. Supplement brands often add cheap, toxic fillers to keep their prices low.

Here are three supplements, in particular, to avoid…

Nature Made: The first ingredient listed is Soybean Oil—a highly processed seed oil rich in omega-6 fatty acids. While omega-6 fats are essential in moderation, they're already abundant in our Western diet. Overconsumption may lead to an imbalanced omega-6 to omega-3 ratio, which some studies suggest could contribute to increased inflammation and potentially raise the risk of chronic diseases. 

Nature’s Bounty: Again, the first ingredient listed is Soybean Oil. But this supplement takes it one step further by adding Corn Oil, too. This not only increases omega-6 intake but also increases the risk of inflammation in the body. Plus, much of the corn used to produce corn oil is genetically modified, which increases one’s exposure to GMOs. 

Amazon Basics: Don’t let the organic ingredients fool you. These vitamin D3 gummies include 2 grams of added sugar per serving. While that may not seem like a lot, it adds up to 730 grams of extra sugar over the course of a year—that’s over 3.5 cups of sugar! Supplements should provide essential nutrients that our modern diet lacks, not contribute to our already high sugar intake.

Vitamin D, often called the "sunshine vitamin," is an essential nutrient that plays a central role in our overall health. Despite its name, it's not just a vitamin—it's actually a hormone that our bodies can produce when our skin is exposed to adequate sunlight.

In the past, humans got most of their vitamin D from sun exposure. However, our modern lifestyles often keep us indoors, and when we do venture outside, we're usually covered up or wearing sunscreen.

This shift has led to a widespread deficiency in vitamin D. In fact, it's estimated that over 1 billion people worldwide have low levels of this crucial nutrient. That's where vitamin D3 supplements come in: they can help bridge the gap between what we need and what we're getting from the sun and the foods we eat.

Vitamin D deficiency is surprisingly common, and fortunately, there are some key indicators that can signal a possible deficiency.

General symptoms of vitamin D deficiency often include:

• Fatigue and tiredness
• Bone pain or achiness
• Dull, dry skin
• Hair loss
• Muscle weakness or pain
• Mood changes, including low mood
• Weak fingernails
• Decreased bone density
• Cardiovascular concerns

However, vitamin D deficiency can manifest in various other ways, and some symptoms might be less obvious or develop over time.

By taking a premium vitamin D3+K2 supplement daily, you may experience the following science-backed benefits:

Boost your immune defense

Strengthen your bones & teeth

Support calcium absorption & distribution

Enhance muscle function & strength

Improve mood & emotional balance

Maintain heart health & circulation

To recap, there are seven important criteria to consider when shopping for a vitamin D supplement…

1. Make sure it’s formulated with vitamin D3 (cholecalciferol), and not vitamin D2. 

2. Confirm that it has vitamin K2 (often in the form of MK-7). You’ll experience better bone health, immunity, and calcium distribution by pairing these two vitamins—D3 and K2—together. 

3. Look for a vitamin D supplement in liquid form. Liquid vitamins absorb faster, are more usable by the body (bioavailable), and are easier on the digestive system. 

4. Make sure your vitamin D supplement contains between 2,000 and 4,000 IU of vitamin D3 and 100 to 200 mcg of vitamin K2.

5. The price per serving should be less than a dollar.

6. Ensure the supplement is third-party tested and made in the USA.

7. Double-check the ingredient label: it should only contain vitamin D3, K2, and a carrier oil like organic MCT oil or organic extra-virgin olive oil. Avoid vitamin D supplements with sugar and seed oils (like soybean oil). 

“I feel that it makes a big difference in my joints, energy level, stamina, body clock, flexibility…all have improved. Thank you.”

—Diane V., NativePath Verified Customer, 04/09/2024

“Easy to use and no strong taste

Use for stronger bones.”

—Shirley H., NativePath Verified Customer, 04/11/2024

“I’ve been traveling a lot in the past year and I realized that I have been staying healthy. I think it’s the vitamin D added to my supplement regimen.”

—Joy T., NativePath Verified Customer, 03/31/2024

“Brought my wife's vitamin D level up double I am back to a normal level”

—Jack W., NativePath Verified Customer, 02/27/2024

“Easy to take. Made me feel better very quickly. I no longer have the winter blahs.”

—Jane H., NativePath Verified Customer, 02/11/2024

“I love this product it’s two in one and it saves me money to where I don’t have to go buy two bottles separately, plus it makes my muscles and bones feel so nice and strong, plus I’m sleeping better too.👍😍”

—Brandie, NativePath Verified Customer, 12/11/2023

“I love it so much I ordered more. So convenient & tastes good. I will definitely be using it from now on. Much easier than pills.”

—Sue F., NativePath Verified Customer, 12/02/2023

Customer results have not been independently verified. Individual results may vary.

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References

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The information contained within this site is not intended as a substitute for professional medical advice. If you have, expect to have, or suspect you may have any medical condition, you are urged to consult with a health care provider. These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any diseases or medical conditions. Results are based on the Natural Reviews Ranking System and do not necessarily reflect typical results from the use of these products. Please visit product websites for more information.

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