I have been slowly switching all of my supplements to Thorne as I've been thoroughly impressed with the freshness and digest-ability of their products.<br /><br />I began taking Thorne's Nutrifem multivitamin, Floramend Prime Probiotic, and liquid Vitamin D at the same time, and have been doing so daily for 2 weeks. There's been a big increase in energy and mental clarity. I cannot say which Thorne product is making the biggest difference, I'm just happy that it's all working!<br /><br />I have serious food allergies and have had no reaction to any Thorne product.<br /><br />Also, it doesn't have much of a taste, it's much like putting a drop of vegetable oil on your tongue.

This is an oil which you can up drops under your tongue or just put a few drops on your skin and rub it in which is what I do. Recommended dose is only two drops so a bottle lasts forever in case you think 1 oz sounds like a small amount. There are 600 dozes per container.<br />Vit D3 = 1000 IU<br />Vit K = 200 mcg<br />This is a great quality of D along with K which helps with the absorption. If you have an elderly person you want to have D/K rubbing a few drops on the skin is far easier than trying to get them to take one more pill!

Who the heck created such a poorly designed bottle?? I read previous reviews and ignored them thinking how possibly bad could this be?<br /><br />Upon first unscrewing the lid, it looks like an essential oil dropping mechanism plug. But nothing comes out! So you are forced to use a knife or other object to pull off the plastic top and throw it away. Leaving you to use a spoon to carefully pour.<br /><br />Dumb design, I bought the other bottle that’s abailable and it had the same top. Wow.<br /><br />My advice to this company is to make a dropper!

I have ordered this many times, and while I like the product, the top of the dropper always goes &#34;lopsided&#34; on me and it ends up leaking everywhere, so I have to throw it away before I've used it all. I've tried shoving it back it, but can't. This has happened consistently with every one I've purchased. I keep telling myself it's a fluke and continue to buy it... well, I'm finally convinced it's not.

These 500 IU Vitamin D Drops are, in my opinion, a very safe and easy way to supplement Vitamin D, an essential nutrient. The older you are, the more important Vitamin D supplementation can be, as it has some hormonal effects and is important for bone, skin, and eye health. It can also boost mood and has some powerful immune system effects.<br /><br />Daily requirements are very controversial, and, in my opinion, very dependent on your genetics; I suggest you research this thoroughly for yourself before supplementing, and, if you choose, work closely with a trusted health professional.<br /><br />I think it's also VITALLY IMPORTANT to concurrently supplement with Vitamin K2 (like this soy-free version: [[ASIN:B0013EJ5QM NOW Foods Vitamin K-2,100mcg, 100 Vcaps]] ). Simultaneous Vitamin K supplementation is important, long-term, to prevent calcification and atherosclerosis (PLEASE research this for yourself; Google can help). K2 is also an excellent bone-builder in its own right. Personally, I supplement with somewhat high levels of D and have my blood tested every 6 months to keep it at 70 or so. Amazon even sells mail-in Vitamin D blood spot test kits [[ASIN:B0083MPM1Y Vitamin D Test]] , so you can easily & safely do this without a visit to a lab, if you choose.<br /><br />The flavor of these drops is just fine; it's in a coconut oil base, easy to take sublingually (under the tongue) for fastest action. Highly recommended for its quality & effectiveness!<br /><br />----<br />Have a question about this supplement? Just leave a comment & I'll be happy to help you, if I can.<br />---<br />UPDATE 3/2/16: Responded to a question & thought I'd post the answer w/i the review, just FYI:<br />Q: How much do you take daily?<br /><br />A. My intake varies, depending on how much sun exposure I get in a day (I spend time outside, whenever I can). i take 1 [[ASIN:B0013EJ5QM NOW Foods Vitamin K-2,100mcg, 100 Vcaps]] and 6000 iu (12 drops of this 500 iu Thorne D3) daily, on average. In winter, I double that. For my age (over 40) and gender (female), that seems to work very well at keeping me at my goal of 70. I actually bought this lower-dose 500iu for my hubby (who needs less), but simply take more drops myself to get what I need, just to simplify our supplements.<br /><br />Dosages are SO individualized & really depend quite a bit on your genetics and the general state of your health. I had my gene print &#34;read&#34; at 23andme & some analysis through promethease definitely showed that I have a genetic proclivity toward a greater-than-average need for Vitamin D.<br /><br />My best advice is to get your bloodwork done FIRST, then get medical advice as to a starting dosage to raise your levels. Hope that helps!

I was extremely vitamin D deficient. So I ordered Thorne liquid vitamin D. When I went back for a follow up, my doctor was actually surprised when that I wasn't vitamin D deficient. Living in Seattle, he rarely sees people who get enough vitamin D.