10 Best Vitamin D3 4000 of 2025

Tested and Reviewed: Top 10 Vitamin D3 4000 deals with expert ratings from 8.1 to a perfect 10

March 2026 Edition

Editor's Choice

9.7

Sports Research

Sports Research® Vitamin D3 4000 IU with Coconut MCT Oil - Double Strength Vitamin D Supplement - Gluten Free · Non-GMO · Soy Free - 360 Count Softgels

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Editor's bottom line:

“This vitamin d3 4000 is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

SHINE BRIGHT: Vitamin D3 helps the body absorb calcium and phosphorus, essential minerals for maintaining strong bones and teeth. It's also known as the 'sunshine vitamin', with adequate levels providing immune system support and overall wellness so you can shine at your brightest.*
ONE-A-DAY FORMULA: Just one easy-to-swallow liquid softgel daily provides 100 mcg (4000 iu) of high potency Vitamin D3 as cholecalciferol - the body's preferred form of Vitamin D.*
WITH COCONUT MCT OIL: Vitamin D3 delivers the best benefits when taken with food or another source of fat, which is why we add medium chain triglycerides (MCT), the best fats from coconut oil, to our softgels to help ensure that you get the most from this essential micronutrient.*
PREMIUM QUALITY: We hold all of our supplements to a higher standard. Sports Research Vitamin D3 softgels are IGEN non-GMO tested and free of unwanted fillers, gluten, and seed oils such as soybean & safflower oil. Each batch is third-party tested for quality and manufactured in the USA in a cGMP-compliant facility.
THE SPORTS RESEARCH DIFFERENCE: Founded in Southern California in 1980, Sports Research is a family-owned business born from a passion for fitness and wellness. Our goal is to embrace the sport of life through research-backed products created for every bodyinside and out.

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Picked by 397 people today

9.5

NatureWise

NatureWise Vitamin D3 4000iu (100 mcg) 1-Year Supply for Immune Support, Healthy Muscle Function, and Bone Health - Non-GMO, Gluten-Free in Organic Extra Virgin Olive Oil, (Mini Softgel), 360 Count

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Main Highlights

IMMUNE, MOOD, BONE & MUSCLE SUPPORT*: Vitamin D supports healthy bones, muscle function, and a strong immune system.*
NATURALLY-SOURCED, NON-GMO: These Vitamin D3 immune support and bone health supplements* are formulated with a naturally-sourced vitamin D3 ingredient, and are gluten-free and non-GMO. Packaging may vary due to high demand, same great product and ingredients.
IN ORGANIC COLD-PRESSED OLIVE OIL: NatureWise Vitamin D3 is formulated with organic, cold-pressed olive oil that doesn't use heat or hexanes, to enhance the absorption of vitamin D3.*
CONTENTS CERTIFIED NSF: This supplement is NSF-contents certified, which means its contents are thoroughly tested for accuracy and purity. Ingredients are also analyzed for this certification to confirm they match label contents.
USA MANUFACTURED, 3RD PARTY TESTED: All NatureWise supplements are proudly manufactured the USA in facilities that comply to the strictest cGMP standards and undergo rigorous testing by third party labs to ensure the highest quality and purity.

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9.5

NatureWise

NatureWise Vitamin D3 4000iu (100 mcg) 90-Day Supply for Immune Support, Healthy Muscle Function, and Bone Health - Non-GMO, Gluten Free in Organic Extra Virgin Olive Oil, (Mini Softgel), 90 Count

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Main Highlights

IMMUNE, MOOD, BONE & MUSCLE SUPPORT: Vitamin D supports healthy bones, muscle function, and a strong immune system.
NATURALLY-SOURCED, NON-GMO: These Vitamin D3 immune support and bone health supplements are formulated with a naturally-sourced vitamin D3 ingredient, and are gluten-free and non-GMO. Packaging may vary due to high demand, same great product and ingredients.
IN ORGANIC COLD-PRESSED OLIVE OIL: NatureWise Vitamin D3 is formulated with organic, cold-pressed olive oil that doesn't use heat or hexanes, to enhance the absorption of vitamin D3.
CONTENTS CERTIFIED NSF: This supplement is NSF-contents certified, which means its contents are thoroughly tested for accuracy and purity. Ingredients are also analyzed for this certification to confirm they match label contents.
USA MANUFACTURED, 3RD PARTY TESTED: All NatureWise supplements are proudly manufactured the USA in facilities that comply to the strictest cGMP standards and undergo rigorous testing by third party labs to ensure the highest quality and purity.

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9.2

NatureWise

NatureWise Vitamin D3 4000iu (100 mcg) 200-Day Supply for Immune Support, Healthy Muscle Function, and Bone Health - Non-GMO, Gluten Free in Organic Extra Virgin Olive Oil, (Mini Softgel), 200 Count

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Main Highlights

IMMUNE, MOOD, BONE & MUSCLE SUPPORT*: Vitamin D supports healthy bones, muscle function, and a strong immune system.*
NATURALLY-SOURCED, NON-GMO: These Vitamin D3 immune support and bone health supplements* are formulated with a naturally-sourced vitamin D3 ingredient, and are gluten-free and non-GMO. Packaging may vary due to high demand, same great product and ingredients.
IN ORGANIC COLD-PRESSED OLIVE OIL: NatureWise Vitamin D3 is formulated with organic, cold-pressed olive oil that doesn't use heat or hexanes, to enhance the absorption of vitamin D3.*
CONTENTS CERTIFIED NSF: This supplement is NSF-contents certified, which means its contents are thoroughly tested for accuracy and purity. Ingredients are also analyzed for this certification to confirm they match label contents.
USA MANUFACTURED, 3RD PARTY TESTED: All NatureWise supplements are proudly manufactured the USA in facilities that comply to the strictest cGMP standards and undergo rigorous testing by third party labs to ensure the highest quality and purity.

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9.0

Nature Made

Nature Made Vitamin D3 5000 IU (125 mcg) Softgels, Extra Strength Vitamin D Supplement for Bone and Immune Health Support, 180 Count, 180 Day Supply

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Main Highlights

Immune, muscle, teeth and bone health support supplement: contains one 180 count bottle of Nature Made Extra Strength Vitamin D3 5000 IU (125 mcg) Softgels for a 180-day supply
Nature Made Vitamin D 5000 IU softgels help improve calcium absorption, support bone health, teeth health, muscle health, and provide immune support
This high dose Vitamin D 3 product is for those with higher Vitamin D needs and/or deficiency, as determined by a healthcare professional (1)
Adults, take one Vitamin D3 Nature Made softgel daily with water and a meal
Sourced from high-quality ingredients, this Nature Made Vit D3 supplement is gluten free and has no color added and no artificial flavors
United States Pharmacopeia (USP) Verified, #1 Pharmacist Recommended Vitamin & Supplement Brand*
These statements have not been evaluated by the Food and Drug Administration; this product is not intended to diagnose, treat, cure, or prevent any disease

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8.8

Nature Made

Nature Made Vitamin D3 2000 IU (50 mcg), Vitamin D Supplement for Bone, Teeth, Muscle and Immune Health Support, 250 Softgels, 250 Day Supply

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Main Highlights

Immune, muscle, teeth and bone health support supplement: contains one 250 count bottle of Nature Made Vitamin D3 2000 IU (50 mcg) Softgels for a 250-day supply
Nature Made Vitamin D 2000 IU softgels support bone health, teeth health, muscle health, and provide immune support
These Vitamin D 2000IU softgels help improve calcium absorption and contain 50mcg of Vitamin D 3, the bodys preferred form of Vitamin D
Helps slow biological aging of cells; In a clinical study, taking 2000 IU vitamin D3 supplements for 4 years helped prevent leukocyte telomere shortening, preventing the equivalent of approx 3 years of cellular aging compared with placebo in older adults
Adults, take one Vitamin D3 softgel daily with water and a meal
Sourced from high-quality ingredients, this Nature Made Vitamin D3 supplement is gluten free and has no color added and no artificial flavors
United States Pharmacopeia (USP) Verified, #1 Pharmacist Recommended Vitamin & Supplement Brand*
These statements have not been evaluated by the Food and Drug Administration; this product is not intended to diagnose, treat, cure, or prevent any disease

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8.6

YounGlo Research

YounGlo Research Vitamin D3 4000 IU Dietary Supplement to Promote Healthy Bone & Immune Function, Easy-to-Swallow 360 Softgels

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Main Highlights

HIGH POTENCY - With 500% of the daily value, this fat-soluble vitamin with olive oil can help to provide greater absorption by the body
GMP CERTIFIED - This non-GMO vitamin is free of dairy, gluten, sugar, and stearates; Plus, we have GMP certification
BENEFITS - Vitamin D3 may help the body absorb calcium to strengthen bones and stimulate T-cell production to support the body's natural defenses
360 SOFTGELS - A full year supply for year-round health support
TRIED AND TESTED - YounGlo Research uses its extensive knowledge in nutritional research and selects quality ingredients with a cooking formula to create a recipe for dehydrated, powdered bone broth in which you'll be 100% satisfied

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8.3

WeightWorld

WeightWorld Vegan Vitamin D3 4000 IU Tablets - 400 Count - D3 Vitamin for Bone & Immune Health - (13+ Months Supply) - High Potency Vegan D3 for Women & Men - GMP-Approved - Gluten-Free - Non-GMO

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Main Highlights

VITAMIN D3 FOR BONE & IMMUNE HEALTH: Many people in the US don't get enough sun exposure, making vitamin d supplements an important part of day-to-day life. Our high-potency vit d3 tablets support normal bone health and immune health. A steady dose of vitamin d 4000 iu offers reliable coverage for modern indoor lifestyles with long work hours and limited sun exposure, giving you balanced nourishment and consistent d3 vitamin intake as part of your everyday lifestyle.
VEGAN VITAMIN D3 SOURCED FROM LICHEN: WeightWorld's vitamin d3 4000 iu tablets are made with plant-based cholecalciferol derived from lichen, this vitamin d3 vegan source is suitable for anyone looking for a plant-derived option. It offers steady daily support through vegan vitamins d3, making it a flexible choice for all lifestyles. Whether you prefer plant-based products or simply want a vitamin d vegan option, this vegan d3 formula fits easily into wide range of lifestyles.
COMPLETE 13-MONTH SUPPLY: Our vitamins d3 cholecalciferol delivers 400 tablets - one tablet per day gives you 13 months of dependable vitamin d 4000 iu supply, fitting smoothly into your everyday life. Our vitamin d supplements formulation provides a better vit d3 coverage and a practical way to maintain steady d3 vitamin levels from a single daily serving. Unlike vitamin d3 4000 iu softgels that can melt or turn sticky in hot weathers, our tablets stay stable, are easy to store, and fuss-free.
THIRD-PARTY TESTED & GLUTEN-FREE: WeightWorld's vegan vitamin d3 formula is GMP-approved, non-GMO, magnesium stearate-free, and third-party tested for added assurance. Our vitamin D3 4000 iu are also gluten-free, lactose-free, soy-free, and made without artificial flavors. These vitamin d vegan tablets are dependable, making them a strong and reliable choice among many vitamin d3 supplements. Our vitamin d3 for men and women tablets are convenient option for everyday use.
INTRODUCING WeightWorld: Founded in 2006 from a passion for dietary supplements, what began as a small, family-run brand in the UK has grown into a well-established name across global marketplaces. With nearly two decades of helping people around the world feel their best, we offer a wide range of vitamins, minerals, plant-based supplements, and devices. WeightWorld continues to expand while staying true to its mission of supporting everyday health through thoughtful, science-backed nutrition.

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8.1

Carlson

Carlson - Vitamin D3, 4000 IU (100 mcg), Vitamin D Supplements, Bone & Immune Health, Cholecalciferol Supplement, Gluten Free Vitamin D Capsules, 120 Softgels

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Main Highlights

BONE HEALTH AND IMMUNE FUNCTION - Carlson Vitamin D3 softgels are the preferred form of vitamin D that's important for promoting strong bones and supporting immune system health.
SUPPORT IMMUNE HEALTH - Vitamin D 4,000 IU (100 mcg) softgels helps boost our immune system and create a healthy immune balance.
PROMOTE HEART AND MUSCLE HEALTH - Vitamin D3 plays an important role in promoting heart function and supporting muscle health.
VITAMIN D3 4,000 IU (100 MCG) - A single softgel provides 4,000 IU (100 mcg) of vitamin D3 as cholecalciferol.
QUALITY GUARANTEED SINCE 1965 - All Carlson products are tested by an FDA-registered laboratory for potency and quality.
During the summer months products may arrive warm but Amazon stores and ships products in accordance with manufacturers' recommendations, when provided.

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8.1

Carlson

Carlson - Vitamin D3, 4000 IU (100 mcg), Bone & Immune Health, Cholecalciferol Supplement, Gluten Free Vitamin D Capsules, 360 Softgels

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Main Highlights

During the summer months products may arrive warm but Amazon stores and ships products in accordance with manufacturers' recommendations, when provided.

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Our Best Overall Choice

Best Choice

9.7

Sports Research

Sports Research® Vitamin D3 4000 IU with Coconut MCT Oil - Double Strength Vitamin D Supplement - Gluten Free · Non-GMO · Soy Free - 360 Count Softgels

Free Shipping

Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

SHINE BRIGHT: Vitamin D3 helps the body absorb calcium and phosphorus, essential minerals for maintaining strong bones and teeth. It's also known as the 'sunshine vitamin', with adequate levels providing immune system support and overall wellness so you can shine at your brightest.*
ONE-A-DAY FORMULA: Just one easy-to-swallow liquid softgel daily provides 100 mcg (4000 iu) of high potency Vitamin D3 as cholecalciferol - the body's preferred form of Vitamin D.*
WITH COCONUT MCT OIL: Vitamin D3 delivers the best benefits when taken with food or another source of fat, which is why we add medium chain triglycerides (MCT), the best fats from coconut oil, to our softgels to help ensure that you get the most from this essential micronutrient.*
PREMIUM QUALITY: We hold all of our supplements to a higher standard. Sports Research Vitamin D3 softgels are IGEN non-GMO tested and free of unwanted fillers, gluten, and seed oils such as soybean & safflower oil. Each batch is third-party tested for quality and manufactured in the USA in a cGMP-compliant facility.
THE SPORTS RESEARCH DIFFERENCE: Founded in Southern California in 1980, Sports Research is a family-owned business born from a passion for fitness and wellness. Our goal is to embrace the sport of life through research-backed products created for every bodyinside and out.

Show Price

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