If you are a man over 40 who spends most of the day indoors or lives in a northern climate, you know the struggle of maintaining healthy vitamin D levels. This nutrient is crucial for everything from immune function to bone density and even mood regulation. NOW Foods, a trusted name in natural supplements since 1968, offers several vitamin D3 options. In this NOW Vitamin D3 review, we compare four popular formulas to help you find the right fit. We have also evaluated collagen supplements for overall wellness, which you can read about in our youtheory collagen review.
Pros
- Potent dosage ideal for addressing deficiency
- Liquid softgel for superior absorption
- Clean label with no common allergens
- High quality, third-party tested
- Generous bottle size for value
Cons
- Contains gelatin, not vegetarian-friendly
- 5,000 IU may be higher than some individuals require
- Softgels may have a faint natural odor
NOW Foods Vitamin D3 5,000 IU is a high-potency supplement designed for adults who need a strong daily dose of the sunshine vitamin. It comes in a convenient liquid softgel form, ensuring rapid absorption and effective delivery of this essential nutrient.
The standout feature is its potency, delivering 5,000 IU per serving, which supports healthy immune function and helps maintain optimal bone mineral density. Many users report improved energy levels and a stronger sense of well-being when taking this supplement regularly. The liquid softgel formulation is particularly beneficial for those who have trouble swallowing tablets or need enhanced absorption.
In terms of design and quality, NOW Foods ensures that each batch is third-party tested for purity and potency. The softgels are compact and easy to take, with no unpleasant aftertaste. The bottle is sturdy and provides a generous 240-count supply, lasting over seven months when used daily.
However, it's worth noting that the softgels contain gelatin, making them unsuitable for vegetarians or vegans. Additionally, the 5,000 IU dose may be more than some individuals need, so it is advisable to consult a healthcare professional before starting any new supplement regimen.
Overall, NOW Foods Vitamin D3 5,000 IU is a reliable and effective choice for those seeking to correct or prevent vitamin D deficiency. Its high quality, clean label, and competitive pricing make it a top pick among similar supplements.
Color: Yellow/Green
Size: 240 Count (Pack of 1)
Dimensions: 1.85 x 1.8 x 2.9 inches
Weight: 0.2 pounds
Form: Softgel
Recommended Use: One softgel daily with food
Pros
- Dual nutrient formula (D3 + K2) for synergistic bone and heart benefits.
- Non-GMO, Soy Free, and Kosher certified for clean supplementation.
- GMP Quality Assured with in-house lab testing for purity and potency.
- Affordable price point for a two-month supply.
- Trusted brand with decades of experience in natural supplements.
Cons
- Some users may prefer higher vitamin D3 dosages (e.g., 2000 IU) for stronger immune support.
- Capsules are beige in color, which may indicate natural ingredients but could be less visually appealing.
- No customer reviews available yet, so real-world feedback is limited.
The NOW Supplements Vitamin D-3 & K-2 combines 1000 IU of vitamin D3 with 45 mcg of vitamin K2 in a single veg capsule. This formula is designed for adults seeking comprehensive support for bone density, cardiovascular function, and immune health. It's an excellent choice for those who prefer a dual-nutrient supplement over taking separate pills.
The synergy between D3 and K2 is a standout feature. Vitamin D3 enhances calcium absorption, while K2 directs that calcium to the bones and teeth, preventing it from depositing in arteries. This combination supports both skeletal strength and heart health. The 1000 IU D3 dosage is suitable for general maintenance, and the 45 mcg K2 (as MK-7) ensures optimal bioavailability.
NOW is a reputable manufacturer with GMP Quality Assurance and third-party testing. The capsules are vegan, non-GMO, soy-free, and kosher. Each bottle contains 120 capsules, providing a two-month supply when taken as directed. The beige color reflects the natural ingredients, and the packaging is straightforward and informative.
One potential drawback is the relatively modest vitamin D3 dose of 1000 IU. Some individuals, especially those with deficiencies or limited sun exposure, may require a higher dosage. Additionally, the lack of customer reviews makes it harder to gauge long-term satisfaction. However, NOW's longstanding reputation mitigates this concern.
Overall, the NOW Vitamin D-3 & K-2 supplement offers a well-researched, high-quality combination at an affordable price. It's ideal for anyone looking to support bone and cardiovascular health with a clean, trusted brand. While the D3 dose may be low for some, it's a solid starting point for daily maintenance.
Pros
- High potency 1,000 IU per softgel for effective daily dosing
- Large 360 count bottle offers excellent value
- Multiple certifications (Non-GMO, Soy Free, Halal, Kosher) cater to various dietary needs
- GMP quality assurance ensures reliable potency and purity
- Trusted brand with decades of experience in natural products
Cons
- Contains gelatin, not suitable for vegans or vegetarians
- Softgels may be large for some individuals to swallow
- Only 1,000 IU per softgel, users needing higher doses must take multiple
NOW Supplements Vitamin D-3 1,000 IU Softgels provide a reliable and affordable way to support bone health and immune function. Designed for adults who may lack sun exposure or dietary vitamin D, each softgel delivers a potent 1,000 IU of cholecalciferol. The 360 count bottle ensures a convenient three month supply at a low cost.
The standout feature is the brand's commitment to quality: every batch is third party tested for stability, potency, and purity under GMP standards. Additionally, the softgels are Non-GMO, Soy Free, and certified Halal and Kosher, making them accessible to a wide range of dietary preferences. Despite the description mentioning a chewable form, this product is a softgel, which is easy to swallow for most users.
Build quality is solid, with the softgels packaged in a durable, light resistant bottle to preserve freshness. The softgels themselves are a standard size, though some may find them slightly large. The brand's long history since 1968 adds trust, as NOW is a well known manufacturer in the natural products industry.
A potential drawback is the use of gelatin, which excludes vegetarians and vegans. Also, those requiring higher doses (e.g., 5,000 IU daily) will need to take multiple softgels. However, for basic maintenance, 1,000 IU is appropriate for many adults.
Overall, NOW Vitamin D-3 1,000 IU Softgels offer exceptional value, quality certifications, and reliable support for bones and immunity. It is a solid choice for anyone seeking a clean, affordable vitamin D supplement.
Pros
- Effective combination of D3 and K2 for synergistic bone and heart benefits
- MenaQ7 MK-7 is a superior, well-researched form of vitamin K2
- Third-party tested for stability, potency, and formulation accuracy
- Soy-free and suitable for various dietary preferences
- Reputable brand with long-standing commitment to quality
Cons
- 5000 IU of D3 may be too high for some individuals; consult a healthcare provider
- Capsules are slightly larger than average, which may be difficult for some to swallow
- Price is higher than basic vitamin D3 supplements due to added K2
The NOW Supplements Mega D-3 & MK-7 is a targeted nutritional formula designed for adults who want to support both bone density and cardiovascular health. It combines 5000 IU of vitamin D3 with 180 mcg of vitamin K2 as MenaQ7 MK-7, a unique soy-free and highly bioavailable form. This product is ideal for those who recognize the synergistic role these vitamins play in calcium metabolism and overall wellness.
Standout features include the clinically studied MenaQ7 MK-7, which supports arterial health by directing calcium away from blood vessels and into bones. The high-dose D3 also contributes to immune function, making this a versatile supplement. In real-world use, users report noticeable improvements in markers of bone strength and cardiovascular comfort when taken consistently as part of a balanced regimen.
Design and build quality reflect NOW's commitment to excellence. The capsules are off-white and free from common allergens like soy. The manufacturing process is GMP certified, with in-house ISO/IEC accredited labs testing for stability and potency. This level of transparency adds confidence for health-conscious consumers.
Potential drawbacks include the high D3 dosage, which may not be suitable for everyone without medical guidance. Additionally, the capsule size is slightly larger than standard, which could be a minor inconvenience for those who have difficulty swallowing pills. The price is also a step above basic D3 supplements, justified by the addition of premium K2.
Overall, the NOW Mega D-3 & MK-7 delivers on its promise of dual bone and cardiovascular support. It is a well-formulated, quality-assured product from a trusted brand. For individuals seeking a comprehensive vitamin D and K combination, this supplement is a reliable choice that balances efficacy with safety.
Buying Guide
Potency: High vs. Standard Dosage
Vitamin D3 supplements commonly come in 1,000 IU and 5,000 IU strengths. The 1,000 IU dose is ideal for maintenance if you already get some sun or eat fortified foods. The 5,000 IU option suits those with a known deficiency or limited sun exposure. NOW offers both strengths. For active men needing extra support, check out our guide on muscle support for healthy aging men to see how D3 fits into a broader regimen.
Form: Softgel vs. Veg Capsule vs. Liquid
NOW provides vitamin D3 in softgels, veg capsules, and a liquid form in combination products. Softgels are fat-soluble and easy to absorb, while veg capsules are preferred by those avoiding gelatin. The liquid softgel of the 5,000 IU product ensures high bioavailability. If you value convenience for travel, the softgels are a solid choice.
Quality Certifications
All NOW supplements are GMP Quality Assured, meaning their manufacturing processes are regularly evaluated by third parties. Their in-house labs are ISO/IEC accredited for stability and potency verification. Many products are also Non-GMO, Kosher, and free from soy, gluten, and dairy. These certifications give you confidence in what you are putting into your body.
Synergistic Nutrients: Vitamin D3 with K2
Combining vitamin D3 with vitamin K2 (as menaquinone-7) may enhance bone and cardiovascular benefits. D3 helps calcium absorption, while K2 directs calcium to bones and away from arteries. NOW offers two such blends: Vitamin D-3 & K-2 (1,000 IU / 45 mcg) and Mega D-3 & MK-7 (5,000 IU / 180 mcg). These are excellent for men looking to support heart health and bones simultaneously. For more on longevity, see our muscle support for longevity article.
Final Thoughts
After reviewing the lineup, we recommend two standout products. For those seeking a high-potency solo D3 supplement to maintain strong immunity and bone density, choose the NOW Foods Supplements, Vitamin D-3 5,000 IU. If you prefer an all-in-one approach that also supports cardiovascular health and proper calcium utilization, go with the NOW Supplements, Vitamin D-3 & K-2. Both are backed by decades of quality manufacturing and third-party evaluations. For additional energy support, explore our Energy & Stamina category.
Frequently Asked Questions
How much vitamin D3 should I take daily?
Typical recommendations range from 1,000 IU to 5,000 IU per day depending on your blood levels and sun exposure. Many adults benefit from 2,000 IU daily, but a blood panel is the best way to determine your personal need. Always consult with a healthcare provider before starting any new supplement regimen.
What is the difference between vitamin D2 and D3?
Vitamin D3 (cholecalciferol) is the form produced by your skin when exposed to sunlight and is more effective at raising and maintaining blood levels compared to vitamin D2 (ergocalciferol). NOW exclusively uses D3 for optimal absorption. You can learn more about supplement quality in our REVIEWS section.
Can I take vitamin D3 with K2?
Yes, and many health experts recommend it because vitamin K2 helps direct calcium to the bones and teeth rather than soft tissues. NOW offers combination products like the Vitamin D-3 & K-2 for a convenient two-in-one solution. For more on muscle recovery, check our Top Supplements for Muscle Recovery and Nutrition in 2026.
Is NOW vitamin D3 third-party validated?
Absolutely. NOW Foods is GMP Quality Assured, meaning every facet of their manufacturing is regularly reviewed. Their in-house laboratories are ISO/IEC accredited for stability, potency, and product formulation. All products are Non-GMO, and many are Kosher or Halal certified.
