Thorne Research – Vitamin D/K2 Liquid (Metered Dispenser) – Dietary Supplement with Vitamins D3 and K2 to Support Healthy Bones and Muscles – 1 fluid ounce (30 mL)

(50 Reviews)
Product Id: 256327

Price: $34.03

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5 Great reasons to buy from us:


  • BONES/MUSCLES: Vitamins K and D for support of healthy bones and muscles*
  • CARDIOVASCULAR/IMMUNE: Both vitamins support healthy cardiovascular and immune function*
  • LIQUID: Allows for easy dosing for children and adults
  • FREE FROM: Every Thorne product is made with the purest possible ingredients – without gluten or other major allergens (eggs, tree nuts, peanuts). This product also contains no soy, dairy, yeast, shellfish, or fish.

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Thorne Research - Vitamin D/K2 Liquid (Metered Dispenser) - Dietary Supplement with Vitamins D3 and K2 to Support Healthy Bones and Muscles - 1 fluid ounce (30 mL)

Thorne Research - Vitamin D/K2 Liquid (Metered Dispenser) - Dietary Supplement with Vitamins D3 and K2 to Support Healthy Bones and Muscles - 1 fluid ounce (30 mL)

Thorne Research - Vitamin D/K2 Liquid (Metered Dispenser) - Dietary Supplement with Vitamins D3 and K2 to Support Healthy Bones and Muscles - 1 fluid ounce (30 mL)

Thorne Research - Vitamin D/K2 Liquid (Metered Dispenser) - Dietary Supplement with Vitamins D3 and K2 to Support Healthy Bones and Muscles - 1 fluid ounce (30 mL)

Thorne Research - Vitamin D/K2 Liquid (Metered Dispenser) - Dietary Supplement with Vitamins D3 and K2 to Support Healthy Bones and Muscles - 1 fluid ounce (30 mL)

Thorne Research - Vitamin D/K2 Liquid (Metered Dispenser) - Dietary Supplement with Vitamins D3 and K2 to Support Healthy Bones and Muscles - 1 fluid ounce (30 mL)

Thorne Research - Vitamin D/K2 Liquid (Metered Dispenser) - Dietary Supplement with Vitamins D3 and K2 to Support Healthy Bones and Muscles - 1 fluid ounce (30 mL)

Product description

Thorne logo
D/K2 Liquid

Vitamin D/K2 Liquid is a convenient way to supplement with both vitamins D and K2, which offer greater support for bones and the immune and cardiovascular systems together than either does individually.*

Thorne Bestseller

Thorne Bestseller

Thorne has been trusted by health-care practitioners, U.S. National Teams, and families around the world for more than 30 years. Thorne Bestsellers are a testament to Thorne’s mission to provide high-quality supplements that are tested for quality, safety, and efficacy.

Convenient Protocol

Convenient Protocol

Vitamin D/K2 liquid can be mixed with a food or a beverage for ease of use for all ages.

Free of Additives

Free of Additives

Vitamin D/K2 Liquid is preserved with natural vitamin E for freshness and is free of additives.

Unique Formula

Unique Formula

The Vitamin D/K2 Liquid formula contains well-studied MK-4 as vitamin K2.

Thorne Bestseller

Thorne Bestseller

Convenient Protocol

Convenient Protocol

Free of Additives

Free of Additives

Unique Formula

Unique Formula

Bone support

Bone Support

We don’t give much thought to our bones – until we break one. Although we might think of our bones as inert structures – as scaffolding that holds us up, as protection for the body’s organs, and the structure that allows us to move about – bones are crucial to many more functions than that. Because our bones are living, dynamic, and constantly changing tissues, maintaining proper bone health is important.

Nutritional supplements provide essential support for bone health.* The four most important nutrients for supporting bone health are two vitamins and two minerals – vitamins D and K and calcium and magnesium.* These four nutrients help each other do their jobs, including sending calcium to the bones and keeping it out of the arteries, kidneys, and other soft tissues.*

Thorne quality: no higher standard

When the highest standards have been met, Thorne creates higher ones.





Sourcing Exceptional Ingredients

We develop better standards for higher quality ingredients. Thorne cares deeply about where our ingredients come from. We partner only with suppliers whose practices emphasize quality, science, and responsibility. Better ingredients means better potency, absorption, and digestibility – and ultimately better health.

Manufacturing the Right Way

We manufacture our own products to ensure full supply chain transparency. For more than 30 years, we have invested in clean manufacturing practices. We refuse to use ingredients that can inhibit absorption. We perform our final production in the United States. Our Charleston, SC facility is third-party certified.

Four Rounds of Testing

We run four rounds of testing for each of our products. We have invested in two state-of-the-art in-house laboratories that allow us to conduct four rounds of testing, while most competitors test only one or two times. We test our raw materials, in-process batches, finish products, and product stability for each product.

Thinking Sustainably

We’re thinking sustainably to protect our environment. We believe the environment should never be compromised for the sake of business gain. At Thorne, we believe that doing our part to protect the environment and its most valuable resources goes hand in hand with our product quality standards.

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  1. Dislike pills and have continued to order so my aging mother can take it, too. My doctor, who is holistic, didn’t see a need to test my vit. D levels, so I did it on my own and was dangerously low. I choose Thorne after much review and have not be disappointed. It is important that is has K2 in it as well, for better delivery of D. Even most doctors do not know this. Do your research and be your own advocate before you feel unwell enough to do so.

  2. well, during the winter my vitamin d3 levels were high, so i guess that means it’s working. maybe it also prevents sickness to some extent too (due to better absorption of d?) because i’ve not gotten sick since taking it, really. i always take it with some fat because it’s absorbed with fat.

  3. This is a great Vitamin D with K. After reading how important it is to take Vitamin K when you take Vitamin D, I started taking a separate Vitamin K in addition to my D. When I discovered this, it seemed to be just what I was looking for. The ratio of D to K is what is recommended. The liquid makes it fast and easy to take. It is in an oil base, so it does take a little getting used to. There is no real flavor. It’s kind of like putting some drops of oil on your tongue. I take 5000 iu of D a day, so I count 10 drops on my tongue and that’s it. I do follow it with a drink of something because it doesn’t leave a pleasant taste in your mouth. But it’s definitely palatable. I would highly recommend this for a Vitamin D supplement.

  4. This is a great way to get daily Vitamin D/K2. I apply a drop or two under my tongue every morning. I am sensitive to taste and was worried I might not be able to stomach it. It has a pleasantly mild flavor. I have noticed an improvement in my mood. I would recommend this product to others.

  5. This is in my opinion, the best D3/K2 combo out there. I love how easy it is to take a few drops and get your needed dosage in quickly. I also give it to my kids which they take without issue. This can also easily be put in any sort of drink but we just take it alone. It taste like bland oil. We are never without this D3/K2 combo. It’s a must have! Amazing quality, great price, great product!!! we love Thorne and will continue to use any of their supplements!

  6. I started using this bring up my Vit D, and it was excellent in doing it, I was back to sufficient in no time.The Vit D + K is what is recommended by most support groups.

  7. I have purchased this product multiple times. I was initially using a different company but I learned that Vitamin K2 should be taken along side Vitamin D. Drops are best for us since we have a 3 year old. My husband and I were taking pills but it is easier to all take the same thing, just different doses. This liquid tastes kind of like butter to me. It isn’t bad at all. The ingredients are simple and there are no unnecessary flavors or ingredients added which I appreciate. I have taken other Thorne products because they were recommended by my doctor. This works great for me and my family. This is a great product that I tell my friends about.

  8. I prefer tincture drops to pills as I feel they are better absorbed. This formula of D3 contains K2. Without K2 you are wasting your time taking a D3.

  9. Easy to take, and so helpful for PNW living with lack of sunshine. A girl friend recommended to help with immune systems and I have had really good success in cutting colds down to size.

  10. I live in the pacific northwest where sunny days can be few and far in between, and vitamin D deficiencies are rampant. I used these to supplement as I also work indoors throughout the day and they worked very well. I have a very sensitive stomach and struggle to take vitamin pills, but these drops went down well, with little to no noticeable discomfort. I would highly recommend any Thorne product, they produce very high quality products.

  11. This is a great product. I like it much better than the capsules. I just put a drop or two on my breakfast and it’s great. I used to put it in liquid but it seems to separate and too much of it seemed to stick to the sides of the cup.This was a re-order but the one I received this time did not have the squeeze top dropper which is what the picture showed. It has a dropper under the lid which is fine but I’d prefer to have the one like the picture.

  12. Great product!! Only 2 drops a day and my Vitamin D score went from 25 -65 in 3 months

  13. Thorne company as usual has a great product in this Vita D oil. Particularly due to customer(‘s) daily/weekly needed Vita D amounts not coinciding with prepackaged doses/different amounts. That being said, the oil does not leave a heavy or after taste. However, using it with food/drink instead of placing drops on tongue; especially if you accidentally allow a drop onto your clothing, it does stain just like any other oil.

  14. Works quickly and ups my D3 level easily. The only drawback is delivery system. Prefer the regular dropper her to the new small “dropper”

  15. Vitamin D is neat, because you can see the results from taking a supplement on your blood-work. I have used other liquid Vitamin D products and did not have much improvement on my Vitamin D level. The Thorne Vitamin D and K2 works wonders for me! My Vitamin D is finally in the recommended range. I imagine everyone’s body reacts to different combinations/ supplements of Vitamin D differently, but this is definitely an A plus product for me. Plus it tastes better than many other options.

  16. Previously a favorite product. Will now purchase from a different company due to the change in this product’s dispenser. Disappointed!

  17. Not a fan of the dropper that is included. Hard to tell how many drops come out.

  18. The jury is still out for me on this one. I like the ease of use. It is so much easier to take a couple of drops of liquid than a handful of pills.If it does what I need it to do, get calcium to my bones instead of my arteries, I will have to say I am delighted. I just don’t know until I have test results.

  19. I would have given 5 stars if Thorne hadn’t done away with the dropper and replaced it with a ridiculous dispenser that takes eons for the liquid to come out. The product itself is great quality, my vit D has come up and I can tell a difference in the way I feel (D needs K to be absorbed well). I’ve solved the dumb dispenser issue by washing and reusing the dropper version, and just transferring the liquid (you can’t just change the dropper head for the stupid dispenser head because they’re different sizes screw bottles).

  20. I love it!!! My son and I are using it, accompanied with high concentrations of vitamin C, our inmune system have improved so much(we don’t get sick, we feel good, usual symptoms of sickness have disappeared, after a whole month of use, we continue using it)

  21. DON’T JEOPARDIZE YOUR HEALTHIt’s impossible to know if you’regetting an accurate dose. Most of the doses land outside . The dispenser is poirly designed. Vitamin D supplements are way to important to guess if your getting enough and way to wasteful financially to not get any dose at all. I have seen this complaint in the reviews many times and the Thorne Research has done nothing to correct this problem. If they don’t care about customer satisfaction, who’s to say what else they don’t care about. Will not purchase from them again.

  22. I am not sure I like this new shaker bottle. I love the product however, my neurologist prescribed it as part of my migraine mitigation plan and things are working out beautifully (along with magnesium, B12, B2, CoQ10, and D3). The old bottle had an eyedropper, which worked much better for getting out the “2 drops” needed. But they eyedropper always broke (maybe didn’t get along with this formula and it wore down the rubber). I just bought a bunch of replacement droppers (they failed about every 2-3 months, and one bottle of this lasts me a year and a half). This new “shaker bottle” seems to alleviate the dropper problems, but I have yet to have two uniformly sized drops come out. I may just keep using my replacement droppers with the new bottle. No taste/flavor, which is a good thing.

  23. I love this Vitamin D. First it is combined with Vitamin K plus it is a liquid. No extra additives like there are in pills. I read in other reviews that people were complaining about how to get the liquid out but it is so simple and I love it. Always the right amount. You just hold bottle upside over a spoon and one drop comes out and if you want more just wait for another drop. You have to wait what like 10 seconds not immediate but so what then it is perfect every time. You don’t get too much or too little. Will buy again but I think this bottle will last a long time.

  24. The vitamin d3/k2 is wonderful. However, whoever changed the design from the dropper to the dropper-less method should get fired! A terrible idea that causes so much frustration trying to get the drops to come out.Thorne trying to save a few pennies by not having a dropper? For that reason alone I will give you one star.

  25. I was slightly concerned because of the negative reviews regarding the dispenser. The first time I went to dispense some drops nothing appeared to come out when I first inverted the bottle. I left it upside down and by looking closely at the tip of the dispenser I could see the first drop slowly form. After that one finally dropped off the tip it is now a very simple process and only takes a second or two for a drop to be dispensed. I actually find this to be quite a good design as the drops are so small it would be more difficult to dispense a precise amount and likely more messy to use a regular dropper. So in my experience some patience is required for that first drop and after that dispensing is a breeze.

  26. This appears to be high quality. I have not experienced any dizziness, probably because it contains K2 as well. Some reviewers complain about the dropper. I have no problem with it. Just turn the bottle upside down and the drops start coming within a few seconds. No need to shake the bottle.

  27. I am bottle #2 of this vitamin. It’s easy to use and provides the micro-nutrients I need. Living in Michigan, it’s hard to get enough sunlight in the fall, winter, and spring. I hope this makes up for it.

  28. I was taking D3 and K2 separately and I like that this puts the two together. It doesn’t really taste like anything and the drops that you take are tiny. I haven’t seen a dip in my vitamin D blood levels since I started taking it, so it’s working.

  29. I can feel a difference when I take this, which I can’t say about other brands I’ve tried, though it’s still not as effective for me as fermented cod liver oil. It works for the kids (who won’t always tolerate cod liver oil) and for me–in a pinch. I just wish it had a glass squeeze dropper instead of a euro dropper. I ended up plucking it out and throwing it away. I use a (washed out) glass dropper from another bottle now.

  30. Although this is an excellent product, I would prefer this come with a glass eye dropper, as it is difficult to dispense drops from the bottle. I will be purchasing again, but will find another way to dispense.

  31. I’d give 5 stars for quality and effectiveness of this product, but not having the dropper is a giant pain, especially when I need to give it to small children who have zero patience to wait for the drops to come out.

  32. Product works well. Read complaints about the lack of a dropper, but I found by dropping the drops onto the back of my hand and licking it worked just as well. Have been taking this for years at different doses, depending upon how much sunlight I get. Naturopathic approved!

  33. It’s easy to take, just wait for the drops to drop on your tounge. Who know if it’s really helping your bones? But it can’t hurt.

  34. I was recommended this product by a functional MD. I really like the product, it has no taste. I was blood tested before and 6 months after supplementation, and my tests results proved a 30 point jump up in my Vitamin D.I do HATE the new dispenser, it makes it difficult to use. I wish they would go back to the dropper top.

  35. I repeatedly return to Throne products and this Vitamin D/K2 is no exception!. Yes, I have strayed in the past; thinking I would save a dime or two; or I fell for someone’s ad hype; but not any more. Not only do I see better results with this product (proven by my lab results), I like the dispenser because I know I’m getting an accurate dosage (different pressures on the dropper produces different amounts for me.)Plus… Thorne Research is behind their products 100%; not only with their customer service, but also their interest and commitment to my health.Will I stray again? Nope! I learned my lesson two purchases ago.

  36. This D/K2 liquid is the D/K2 it purports being.Pro:* is as describedCon:* masochistically slow dropper– update –I have replaced this withMAX ABSORPTION, Vitamin D3 + K2 (MK-7) Liquid Drops with MCT Oil,

  37. I purchased this last November and waited until I knew for sure if this product worked. OMG! IT’S AMAZING!! Got the lab reports to prove it. I’m clinically diagnosed with celiac. Can’t seem to absorb much nutrition at all unless it’s sublingual or liquid. Yes, it’s hard to get out. Either take the attached dropper off or place the rim of the bottle against your lips and give a quick suck which is what i do since I’m the only one taking it or drop it on the back of your hand and lick it. I prefer to former method because I think it’s better absorbed under the tongue. I purchased 3 different brands. Tried each for a month and had labs done with each. The other two brands did raise my labs some, but levels were still not optimal. This brand in particular was the ONLY brand where I could actually feel a noticeable difference(in 3 days!), but was still surprised to find just how much it raised my vit. D level clinically. I’m now well within the normal range and feel so much better. No real taste, but is a bit oily. Honestly, it could taste like chicken urine and I’d still take it. The change it’s made in my life is THAT significant. Please don’t let the price steer you away from this brand. It’s worth every cent and the bottle lasts a very long time. As an added note, my doctor wrote the brand name down and is now suggesting it to his other patients. He was THAT impressed with my results.

  38. I love that this comes in liquid as I get so sick of swallowing pills. So easy to use and there are like 600 doses to a single bottle so the price is awesome and it last you a long time before having to get more. Dose is only a few drops…how great is that!

  39. I’ve been using this product for a year or two now and see improvements (I was diagnosed with vitamin D deficiency and was told to supplement by my ND). Clean ingredients and good that it has the added k2. I know a lot of people complain about the dropper but maybe I’m just more patient? I actually like the system because it means it doesn’t leak in my bag when I travel.

  40. Love this supplement, quality & price. I notice a dip in my emotional well being if I don’t take for a few days. Tested low in Vitamin D prior to taking.

  41. From the NBT newsletter about Vitamin D…Get more time in the sun without sunscreen.Believe it or not, sun avoidance has become a major public health risk! Reducing sun exposure originally made sense as part of an effort to reduce skin cancer. However, the unintended consequences (such as increased vitamin D deficiency and a greater risk of many autoimmune diseases and other cancers) perhaps created an even larger problem than the one we were trying to fix. Though sunburn does increase the risk of all skin cancers, getting some sun exposure actually reduces the risk of melanoma! There are a number of potential mechanisms, including the effect of local vitamin D production in the skin. Other factors for melanoma should also be considered, such as genetics and family history.Total time in the sun does increase the risk of non-melanoma skin cancers, but these can usually be treated with surgery, and they rarely metastasise. Balance that risk with data such as that from this study in Sweden, where complete sun avoidance was associated with the same mortality risk as being a smoker! In fact, the more Northern your latitude, the more beneficial (and less detrimental) chronic or occupational sun exposure appears to be. Not to mention the benefits of bright light from the sun on circadian rhythm, blood pressure, and production of serotonin and melatonin.Part of the problem with our current approach to sun exposure may come from sunscreens and how we determine their effectiveness. The Sun Protection Factor (SPF) is based on the degree to which UVB light is blocked, but not UVA. Therefore, when you apply sunscreens, you’re definitely reducing your ability to produce vitamin D (which requires UVB), but you’re not necessarily blocking all the rays that can cause sunburn, skin cancer, or aging of the skin (also caused by UVA). In fact, that UVB you’re blocking is probably protective in terms of melanoma risk. Not to mention that some chemical sunscreens may have endocrine-disrupting effects. Or, as Chris put it: “that lovely smell of suntan cream is, in fact, the smell of your testosterone going down.”The best overall approach to increasing sun exposure (especially in the summer) is to slowly build-up your tolerance without sunscreen to produce protective melanin (i.e. a “tan”), and use physical methods (clothes and shade) more frequently, to prevent burning. Most studies guage time in the sun based on personal “burn time” or “minimal erythemal dose” (MED). For instance, if you would burn in 20 minutes, spending half of that time (i.e. 10 minutes) with 50% of your body exposed to the sun will produce around 4,000IUs of vitamin D. Which 50% you expose is entirely up to you… This should be enough to reverse a borderline deficiency over time, and is probably a good target to avoid sunburn. Maintaining a healthy level of vitamin D (roughly 40-60 ng/ml) will probably require something like 25% of burn time (~2,000IUs of vitamin D), 2-3 times per week. Unfortunately (or not!), you can’t get all the health benefits of sun from a pill.If you’re going to use sunscreen, we’d recommend Zinc or Titanium oxides. These are more inert than chemical sunscreens, do not degrade in sunlight, protect against UVA as well as UVB, and don’t tend to be absorbed through the skin in appreciable amounts. Of course, checking vitamin D sufficiency with blood levels of vitamin D and parathyroid hormone (PTH) is the best way to make sure you’re getting enough sun for your own personal requirements!

  42. Thorne D/K2 liquid is by far the best product of this type on the market. I’ve been using the drops for several years (used others before that), and they consistently keep my Vitamin D levels where they need to be for my health.

  43. I trust the quality from this company. Haven’t had my vitamin D retested yet will update later. Some people complain about the dropper cap. I just gently stuck a toothpick in the opening and wiggled it a little bit. The drops come out perfectly. No biggie!

  44. The dropper has not been an issue for my family at all – it takes just a few seconds for the first drop. It’s completely tasteless so my toddler takes it easily each morning. We don’t measure Vit D levels in my family but I notice some low spirits during the winter months unless we are taking vitamin D. I’ll update if for some reason I don’t notice this helping in a few months! A TON of servings for the price!

  45. Very good so far. Love the drop dispenser, absolutely no issues getting just 1 or 2 drops out.I had become intolerant to Vit D pearls id been using for years and am tolerating these quite well.I’d previously tried MK7 but had heart palpitations from it. No so with this MK4 so far.I take it in AM oatmeal. It’s completely tasteless. I drop it on top of bite rather than mixing it in so I’m confident about dosing.I do have to watch blood sugar… it gets low if I don’t get some protein within a couple hours of taking it.This is a great buy, this bottle will last me years at 2 drops/day. I respect Thorne quality standards too.

  46. Our Dr. recommended 50,000 IU once a day and no more than 5 days in a row for anytime you get a cold or flu etc. it’s worked for us for several years now and every single time! The sickness is usually gone before the 5th day. This has even worked for my adult daughter on chemo. I do not take it daily, however, my vit D levels are perfect according to my recent bloodwork. Because this works so good, I’m willing to put up with a dripperless bottle. I keep a separate dropper I’ve marked with a sharpie for the proper dose.

  47. After trying many brands that did not move my low blood levels of vit D. My doctor recommended Thorne. Within 2 months my levels have stabilized by 20 points!!

  48. Love it. Was wondering if it was actuuuuually going to be tasteless- we all know sometimes reviewers are big fat liars… but the drops totally are! Super easy- had no problems with the portioned dropper and I will buy this again instead of my go-to gummies. Very impressed and wish I found it sooner

  49. use this about everyday in my coffee. When i feel sickness coming up I double up and it kicks it everytime. Absolutely love this product and company. The lid leaks a bit but thats probably because its rattling around my car everyday.

  50. Ok, not saying this will work for everybody, ok? I tilt my head back and slightly separate my teeth, (separating the top teeth from the bottom teeth) …I then center the dropper hole on the teeth where they are separated…I lift the bottle very sllightly off of the teeth, and then gently tap on the bottom of the bottle…basically, you are jamminig the bottle up against the teeth…but, you don’t have to pound the bottle, just gently tap the bottom. I can then feel the drop go thru the separation (between top teeth and bottom teeth) to my tongue…you will feel the drop hit your tongue, thereby making sure you took the desired amount…

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