Vitamin D3, 125 mcg (5,000 IU), 240 Softgels

I trust the quality of Natural Factors supplements because of their ISURA third-party testing. This is the first time we’ll try their vitamin D3, and I hope it works as well as the previous brands we’ve used. The organic flaxseed oil is a plus, although I would still prefer extra virgin olive oil as an ingredient.

8.0 stars Natural Factors Vitamin D3, 125 mcg (5,000 IU), delivers a robust dose aligned with evidence supporting bone health, immune function, and serum 25(OH)D optimization. Multiple RCTs confirm efficacy at —or exceeding—this dosage, with meta-analyses showing consistent 20–30 nmol/L increases in 25(OH)D levels. The cholecalciferol form is well-absorbed, though bioavailability varies individually; third-party testing (NSF) affirms purity, with no detectable contaminants. Softgels include medium-chain triglycerides (MCTs) to enhance absorption, a thoughtful touch. However, the 360-count size may not suit infrequent users; smaller packs exist for less waste. Price per dose is competitive ($0.02). Safety is well-established up to 4,000 IU/day; exceeding this requires caution, especially in hypercalcemic individuals. Minimal interactions reported. Verdict: Strong evidence and quality make this a reliable choice for vitamin D deficiency. Recommended for those needing higher doses, with consideration for smaller packs. Would take/recommend: Yes, with dosage monitoring.

High dosage vitamin D for the winter months when you don't get enough sunlight. The size of the softgels is easy to swallow. Keeping it in the fridge ensures the softgels won't stick together. Good to take daily. I prefer to take some vitamin K with it to aid in the absorption. Great quality product.

This vitamin D is a really good product; it's truly one of the best brands. We've tried it as a family, and it works wonders for our children. I also like that it's not too expensive and has been tested to be chemical-free. Very good.

I really like this vitamin D3; it's very high quality and a great natural source. I really like the Natural Factors brand. I'll keep buying it, but they need more stock and more products. Sometimes I can't find everything I need. But otherwise, everything is great. Thanks!

The quality is excellent—each softgel delivers a potent, highly bioavailable dose of vitamin D3, which is essential for bone health, immune support, muscle function, and overall wellbeing. The softgels are easy to swallow, smooth, and gentle on the stomach, with no unpleasant aftertaste. The typical dosage is one softgel daily, preferably with a meal containing some fat to improve absorption.

Effectiveness: Users have reported positive results, such as increased energy, improved bone health, and a reduction in aches and pains. Many note that the supplement has helped raise their vitamin D levels. Quality and Ingredients: The product is often praised for its high-quality ingredients and potency. Reviewers appreciate that the softgels are suspended in oil for better absorption and that the brand is trusted. The product is also noted for being free of common allergens like artificial colors, preservatives, dairy, and gluten

the quality of this product was top notch because the ingredients r good. it's the perfect size and also good dosage. I enjoyed the benefits along with the pleasant taste.

Vitamin D is essential in this day and age and I prefer Natural Factors for their quality. I typically use this larger dosage in the winter months when I'm not outside in the sun. I can't remember the last time I caught a winter cold. The gel caps are easy to swallow.

Very easy to swallow and excellent product for the money. No bad taste, it works very well. I take one everyday. Would not be without it, offers a very sunny day. I have being buying this vitamin D brand for the last 10 years! And will continue to so! Great brand! Great value, my lab test’s always come back great. My Dr. Is pleased with the numbers.