In the 90s there was a study done attempting to prove the efficacy of vitamin E protecting from prostate cancer. The study was halted early for ethical reasons as those receiving the extra vitamin E were disproportionately being stricken with prostate cancer—the complete opposite of what the study hoped to prove. These were relatively small doses, in line with what you would find in many common multivitamins. I track my vitamin E intake very carefully. Comparing the label to my nature made D3 gelcaps, I noticed these tablets list vitamin E<br />(d-alpha tocophpheryl) under other ingredients with no quantity listed. Maybe they are going above and beyond and listing an inconsequential trace amount that other manufactures don’t list? I don’t know but i’m not going to take the chance.

I research supplement intensely since there are no regulations or anyone overseeing the manufacturing process.<br /><br />Thorne supplements have been solid so far. As long as their dedication to high quality produces continues, I will purchase. Customers must do their own due diligence when it comes to supplements, personal and skincare products. One should always be checking with the FDA's website to find out if there have been recalls. Even the top brands have been known to cut corners and slip substandard ingredients into their products.<br /><br />Always be on the lookout.

Works great, felt improvement in weeks. I like that it is 1000, makes it flexible in how I stack with other supplements that may have D in them, so I can achieve a good, safe daily dose. Remember to stack with K, they need each other to work. Good price and you can’t beat Thorne for quality. Wil continue to buy as long as I need D (so I’m pretty sure this will be a long-term possibly lifelong brand for me).

I use this vitamin with food that has calcium, getting older I’m trying to stay healthy and I like the fact that it’s made in the USA. We should be buying more things manufactured here. Who knows what fillers are put in vitamin s made in other countries. I feel this is a product I can trust

Don't know if it's actually doing anything but I take one a day. If I take one in the morning, I can barely stay awake.<br /><br />Taking one at night has been working for me.<br /><br />Live in Seattle.. clouds all winter!

Great Vit. D replacement. Many companies suggest or advertise the quantity/quality of the vitamin they are selling. I have done quite some reading and research (I enjoy reading/researching as I am a medical student in my 4th year currently) and this company itself actually has very high qulaity vitamins and other supplements with the true to label dosages while some other cheaper companies actually do not have the quality as they claim. Thorne is a great brand, and I have purchased a number of their other products and supplements as well.