Thorne Research - Vitamin D/K2 Liquid - 1 fl. oz.
The Vitamin D Council (VDC) is a non-profit organization of medical professionals, vitamin D researchers, and concerned citizens whose goal is to educate professionals and the public on vitamin D deficiency and its associated health risks. The VDC recommends an average of 5,000 IU/day vitamin D for adults. Better yet, they suggest testing 25-hydroxyvitamin D levels and dosing accordingly. Ideal blood levels should fall between 50-80 ng/mL. *Infants should not receive more than 400 IU/day, which is the daily dose of vitamin D supplement that the American Academy of Pediatrics recommends for breast-fed and partially breast-fed infants.Thorne Research's Vitamin D Liquid is in a base of medium chain triglyceride oil, preserved with mixed tocopherols. Suggested Use Take 2 drops one to three times daily or as recommended by a health-care practitioner. Invert bottle to dispense individual drops. May be added to food or mixed in beverages.
The Vitamin D Council (VDC) is a non-profit organization of medical professionals, vitamin D researchers, and concerned citizens whose goal is to educate professionals and the public on vitamin D deficiency and its associated health risks. The VDC recommends an average of 5,000 IU/day vitamin D for adults. Better yet, they suggest testing 25-hydroxyvitamin D levels and dosing accordingly. Ideal blood levels should fall between 50-80 ng/mL. *Infants should not receive more than 400 IU/day, which is the daily dose of vitamin D supplement that the American Academy of Pediatrics recommends for breast-fed and partially breast-fed infants.Thorne Research's Vitamin D Liquid is in a base of medium chain triglyceride oil, preserved with mixed tocopherols. Suggested Use Take 2 drops one to three times daily or as recommended by a health-care practitioner. Invert bottle to dispense individual drops. May be added to food or mixed in beverages.
The Vitamin D Council (VDC) is a non-profit organization of medical professionals, vitamin D researchers, and concerned citizens whose goal is to educate professionals and the public on vitamin D deficiency and its associated health risks. The VDC recommends an average of 5,000 IU/day vitamin D for adults. Better yet, they suggest testing 25-hydroxyvitamin D levels and dosing accordingly. Ideal blood levels should fall between 50-80 ng/mL. *Infants should not receive more than 400 IU/day, which is the daily dose of vitamin D supplement that the American Academy of Pediatrics recommends for breast-fed and partially breast-fed infants.Thorne Research's Vitamin D Liquid is in a base of medium chain triglyceride oil, preserved with mixed tocopherols. Suggested Use Take 2 drops one to three times daily or as recommended by a health-care practitioner. Invert bottle to dispense individual drops. May be added to food or mixed in beverages.
The Vitamin D Council (VDC) is a non-profit organization of medical professionals, vitamin D researchers, and concerned citizens whose goal is to educate professionals and the public on vitamin D deficiency and its associated health risks. The VDC recommends an average of 5,000 IU/day vitamin D for adults. Better yet, they suggest testing 25-hydroxyvitamin D levels and dosing accordingly. Ideal blood levels should fall between 50-80 ng/mL. *Infants should not receive more than 400 IU/day, which is the daily dose of vitamin D supplement that the American Academy of Pediatrics recommends for breast-fed and partially breast-fed infants.Thorne Research's Vitamin D Liquid is in a base of medium chain triglyceride oil, preserved with mixed tocopherols. Suggested Use Take 2 drops one to three times daily or as recommended by a health-care practitioner. Invert bottle to dispense individual drops. May be added to food or mixed in beverages.
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The lowest price for Thorne Research - Vitamin D/K2 Liquid - 1 fl. oz. right now is $35.53 at fcbanana.com, compared across 15 retailers.
The all-time low was $17.21 on 20 Feb 2026 — today's price is 106% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 10 Sept 2026.
Last updated at 10/09/2026 19:51:50
Thorne, Vitamin D/K2, 1 fl oz (30 ml)
Vitamin D + K2 Liquid - 30 ml
Delivery $34.26
Vitamin D + K2 Liquid
Delivery $83.06
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Delivery $34.26
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Delivery $12.46
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originally posted on iherb.com
This supplement was recommended to me by a nutrition specialist as one of the best in terms of efficiency and due to a combination with K2 vitamin very useful and not harmful for liver as well.Here's why I believe it's a fantastic addition to my daily routine:1. Perfect Duo: Vitamin D and K2: The combination of Vitamin D and K2 in this supplement is a game-changer. Vitamin D is crucial for overall health, and K2 helps ensure that the calcium from Vitamin D is directed to the right places, like the bones, where it belongs. It's a powerful duo for bone and heart health.2. Easy-to-Use Liquid Form: I love that it comes in liquid form. It's super easy to dispense and mix into my morning routine. No more swallowing multiple pills or capsules.3. Precision Dosing: ... MoreThis supplement was recommended to me by a nutrition specialist as one of the best in terms of efficiency and due to a combination with K2 vitamin very useful and not harmful for liver as well.Here's why I believe it's a fantastic addition to my daily routine:1. Perfect Duo: Vitamin D and K2: The combination of Vitamin D and K2 in this supplement is a game-changer. Vitamin D is crucial for overall health, and K2 helps ensure that the calcium from Vitamin D is directed to the right places, like the bones, where it belongs. It's a powerful duo for bone and heart health.2. Easy-to-Use Liquid Form: I love that it comes in liquid form. It's super easy to dispense and mix into my morning routine. No more swallowing multiple pills or capsules.3. Precision Dosing: The dropper allows for precise dosing, so you can tailor your intake to your specific needs. This is especially important for those of us who want to maintain optimal Vitamin D levels, especially during the colder months.4. High Quality, Trusted Brand: Thorne is a brand I trust for its commitment to quality and purity. I appreciate the rigor they put into the formulation of their supplements.5. Improved Energy and Mood: Since I've started using this Vitamin D/K2 combo, I've noticed an improvement in my energy levels and even my mood. It's like having a little burst of sunshine, even on the gloomiest days.6. Compact and Travel-Friendly: The 1 fl oz (30 ml) bottle is compact and travel-friendly, making it easy to take with me wherever I go.In conclusion, Thorne's Vitamin D/K2 supplement is a fantastic addition to anyone's daily regimen. It's a sunshine boost in a bottle that helps support overall well-being, bone health, and heart health. With its liquid form and precision dosing, it's convenient and easy to incorporate into your daily routine. I highly recommend it for anyone looking to maintain their Vitamin D levels and support their health, particularly in those moments when you can't soak up the sun. It's a little bottle of wellness that I won't be without!
originally posted on iherb.com
To be really effective and beneficial you need at least 10,000 IU a day.Unless a person spends some time outside under a sun every day. This is extremely unlikely for most people, except gardeners, construction workers, etc. And of course where sunshine is every day more or less.So 10,000 IU is really a minimum you can have. And Thorne's D3 is superior, like all their supplements. Don't try to count drops. If you get more drops it's even better. If you prefer you can use a stainless spoon, but not plastic one. I'd prefer if Thorne could make it 1 drop containing at least 2000 IU. Otherwise it's excellent and easy to use.
originally posted on iherb.com
Both vitamin D and vitamin K2 support bone and muscle health, along with cardiovascular health and immune function. It is important to maintain an optimal level of vitamin D in the body through all stages of life, from fetal development to old age. Vitamin K2, a series of molecules known as menaquinones, exerts a more powerful influence on bone than does vitamin K1. The vitamin K2 in this formula is the well-studied MK-4. Combining vitamins D and K can provide greater support of the immune and cardiovascular systems than each offers separately. For example, vitamin D is necessary for calcium absorption, and vitamin K is important for directing calcium to the bones and away from the soft tissues, such as blood vessels and kidneys. Thorne's Vitamin D/ K2 Liquid also ... MoreBoth vitamin D and vitamin K2 support bone and muscle health, along with cardiovascular health and immune function. It is important to maintain an optimal level of vitamin D in the body through all stages of life, from fetal development to old age. Vitamin K2, a series of molecules known as menaquinones, exerts a more powerful influence on bone than does vitamin K1. The vitamin K2 in this formula is the well-studied MK-4. Combining vitamins D and K can provide greater support of the immune and cardiovascular systems than each offers separately. For example, vitamin D is necessary for calcium absorption, and vitamin K is important for directing calcium to the bones and away from the soft tissues, such as blood vessels and kidneys. Thorne's Vitamin D/ K2 Liquid also provides nutritional support for oncology patients.One study in postmenopausal women found a combination of minerals along with vitamins D and K maintained healthy artery elasticity, compared to two other groups of women who received either minerals with vitamin D but not vitamin K, or placebo. Thorne's Vitamin D/K2 Liquid is in medium chain triglyceride oil, preserved with mixed tocopherols.
| Variant | |
| size | 30ml |
Thorne, Vitamin D/K2, 1 fl oz (30 ml)
Vitamin D + K2 Liquid - 30 ml
Delivery $34.26
Vitamin D + K2 Liquid
Delivery $83.06
Vitamin D + K2 Liquid - 30 ml
Delivery $34.26
Vitamin D/K2 Liquid, 1 oz, by Thorne Research
Delivery $12.46
This supplement was recommended to me by a nutrition specialist as one of the best in terms of efficiency and due to a combination with K2 vitamin very useful and not harmful for liver as well.Here's why I believe it's a fantastic addition to my daily routine:1. Perfect Duo: Vitamin D and K2: The combination of Vitamin D and K2 in this supplement is a game-changer. Vitamin D is crucial for overall health, and K2 helps ensure that the calcium from Vitamin D is directed to the right places, like the bones, where it belongs. It's a powerful duo for bone and heart health.2. Easy-to-Use Liquid Form: I love that it comes in liquid form. It's super easy to dispense and mix into my morning routine. No more swallowing multiple pills or capsules.3. Precision Dosing: ... MoreThis supplement was recommended to me by a nutrition specialist as one of the best in terms of efficiency and due to a combination with K2 vitamin very useful and not harmful for liver as well.Here's why I believe it's a fantastic addition to my daily routine:1. Perfect Duo: Vitamin D and K2: The combination of Vitamin D and K2 in this supplement is a game-changer. Vitamin D is crucial for overall health, and K2 helps ensure that the calcium from Vitamin D is directed to the right places, like the bones, where it belongs. It's a powerful duo for bone and heart health.2. Easy-to-Use Liquid Form: I love that it comes in liquid form. It's super easy to dispense and mix into my morning routine. No more swallowing multiple pills or capsules.3. Precision Dosing: The dropper allows for precise dosing, so you can tailor your intake to your specific needs. This is especially important for those of us who want to maintain optimal Vitamin D levels, especially during the colder months.4. High Quality, Trusted Brand: Thorne is a brand I trust for its commitment to quality and purity. I appreciate the rigor they put into the formulation of their supplements.5. Improved Energy and Mood: Since I've started using this Vitamin D/K2 combo, I've noticed an improvement in my energy levels and even my mood. It's like having a little burst of sunshine, even on the gloomiest days.6. Compact and Travel-Friendly: The 1 fl oz (30 ml) bottle is compact and travel-friendly, making it easy to take with me wherever I go.In conclusion, Thorne's Vitamin D/K2 supplement is a fantastic addition to anyone's daily regimen. It's a sunshine boost in a bottle that helps support overall well-being, bone health, and heart health. With its liquid form and precision dosing, it's convenient and easy to incorporate into your daily routine. I highly recommend it for anyone looking to maintain their Vitamin D levels and support their health, particularly in those moments when you can't soak up the sun. It's a little bottle of wellness that I won't be without!
To be really effective and beneficial you need at least 10,000 IU a day.Unless a person spends some time outside under a sun every day. This is extremely unlikely for most people, except gardeners, construction workers, etc. And of course where sunshine is every day more or less.So 10,000 IU is really a minimum you can have. And Thorne's D3 is superior, like all their supplements. Don't try to count drops. If you get more drops it's even better. If you prefer you can use a stainless spoon, but not plastic one. I'd prefer if Thorne could make it 1 drop containing at least 2000 IU. Otherwise it's excellent and easy to use.
Both vitamin D and vitamin K2 support bone and muscle health, along with cardiovascular health and immune function. It is important to maintain an optimal level of vitamin D in the body through all stages of life, from fetal development to old age. Vitamin K2, a series of molecules known as menaquinones, exerts a more powerful influence on bone than does vitamin K1. The vitamin K2 in this formula is the well-studied MK-4. Combining vitamins D and K can provide greater support of the immune and cardiovascular systems than each offers separately. For example, vitamin D is necessary for calcium absorption, and vitamin K is important for directing calcium to the bones and away from the soft tissues, such as blood vessels and kidneys. Thorne's Vitamin D/ K2 Liquid also ... MoreBoth vitamin D and vitamin K2 support bone and muscle health, along with cardiovascular health and immune function. It is important to maintain an optimal level of vitamin D in the body through all stages of life, from fetal development to old age. Vitamin K2, a series of molecules known as menaquinones, exerts a more powerful influence on bone than does vitamin K1. The vitamin K2 in this formula is the well-studied MK-4. Combining vitamins D and K can provide greater support of the immune and cardiovascular systems than each offers separately. For example, vitamin D is necessary for calcium absorption, and vitamin K is important for directing calcium to the bones and away from the soft tissues, such as blood vessels and kidneys. Thorne's Vitamin D/ K2 Liquid also provides nutritional support for oncology patients.One study in postmenopausal women found a combination of minerals along with vitamins D and K maintained healthy artery elasticity, compared to two other groups of women who received either minerals with vitamin D but not vitamin K, or placebo. Thorne's Vitamin D/K2 Liquid is in medium chain triglyceride oil, preserved with mixed tocopherols.
This Vitamin D3 and K2 comes in a convenient-sized amber glass bottle liquid form. It is easy to take with the handy dropper bottle and is convenient for travelling with. The fact that the D3 includes the K2 in the same bottle means you don't require a separate vitamin K2 that ensures the D3 is well and safely absorbed. The taste is quite neutral and only 2 drops are taken for every serving up to 3 doses daily, each providing 1000 IU. It is comforting knowing that this supplement helps me provide the necessary daily dose of vitamin D I need, both in summer and especially to help ward off winter blues.
I started taking this supplement because I wanted to improve my bone health and immune system, especially since I spend a lot of time indoors and don't always get enough sun exposure to produce vitamin D naturally. I have noticed an improvement in my energy and vitality. In addition, my recent medical check-ups showed that my vitamin D levels have improved significantly, which is a great relief as they were previously quite low. I believe the addition of vitamin K2 is beneficial as it aids the proper absorption of calcium into the bones instead of it being deposited in the arteries, which is crucial for cardiovascular health.
Thorne Vitamin D/K2 has been an excellent addition to my supplement routine. The combination of Vitamin D and K2 is perfect for supporting both bone density and cardiovascular health. I’ve noticed a remarkable improvement in my overall well-being since I started taking this product. Thorne’s commitment to quality and purity shines through, making this supplement both effective and trustworthy. I highly recommend it for anyone looking to enhance their bone and heart health. Five stars!
Great quality vitamin D, natural and not synthetic as is sold in a regular drugstore. Effective for immune system support in flue season. Contains only natural ingredients. Good size, enough for a long time, even for a few years because you don't need to take it on a daily basis, only when feeling unwell. The dosage is indicated on a bottle. The bottle itself is glass, not plastic. You may take it on a daily basis (2 drops) or once a week 2x7. Good when you live in a country with sun deficiency. Has no taste, so easy to give to children. The package is really enough for a very long time. Take it together with vit C + Zinc for better effect when you caught cold.
Have been taking these drops for over four months and more than anything I have noticed a remarkable difference in my energy levels which have been directly impacting my mentality/self-esteem. I have been feeling a lot more replenished, less likely to procrastinate or make excuses, and far more likely to engage in a sociable and proactive lifestyle. I find myself putting in far more effort with work and enjoying doing so. It has become much easier to enter flow state. I see now why some people say depressive symptoms may be linked to vitamin D deficiency. I have since then bought multiple bottles for my entire family.Bottle also lasts a long time and is so worth the price point. Love this stuff, please never change the formula or quality of your products!
You know all those articles that state scientific, double blind studies have not proven the efficacy of vitamin supplements? Well, I'm only a study of one but WOW, this thing actually works. It's only been three weeks but for the first time since hitting menopause, my nails are growing again and no longer feel brittle. They are starting to feel strong like they used to. If this is the visible impact of this vitamin, I can only imagine how much stronger my bones are getting inside my body.A little about me - I get NO vitamin D whatsoever from my diet (no dairy, eat little meat, no fortified food), hate the sun and as mentioned hit menopause 1 to 2 years back and I can't believe how much my health has been impacted. I knew I needed some source of Vitamin D so ... MoreYou know all those articles that state scientific, double blind studies have not proven the efficacy of vitamin supplements? Well, I'm only a study of one but WOW, this thing actually works. It's only been three weeks but for the first time since hitting menopause, my nails are growing again and no longer feel brittle. They are starting to feel strong like they used to. If this is the visible impact of this vitamin, I can only imagine how much stronger my bones are getting inside my body.A little about me - I get NO vitamin D whatsoever from my diet (no dairy, eat little meat, no fortified food), hate the sun and as mentioned hit menopause 1 to 2 years back and I can't believe how much my health has been impacted. I knew I needed some source of Vitamin D so ordered this one.I researched (probably too much) info about Vitamin D supplements and this one came highly recommended.Adequate dose of Vitamin D, had the all imp't K2 to provide that synergistic effect and was at a very reasonable price point (why are boutique vitamins and high end lotions getting so expensive nowadays?). Thorne's vitamin may be downright inexpensive as I think there may be 1000 drops in this one little bottle.As for the dispenser, I LOVE it for its accuracy and want to thank the other reviewers for letting me know how to use (so I'll share the same). There is no reason to shake the bottle to dispense the liquid - simply turn the bottle complete upside down, a very precise drop of the vitamin will slowly make its way down the opening followed by another drop. It's also at a slow enough pace that you have lots of control and can easily turn it over without any contents spilling over the edge. This is imp't as a daily dose is just 2 little flavorless drops.Another tip from another reviewer, because a day's supply is the aforementioned 2 little drops, I dispense the two drops onto something - an orange, a blueberry, really it could be anything (your chicken mcnuggets).Really, really pleased w/the effect of this vitamin - which at least for my nails - 100% works and wow, works FAST. Also impressed w/IHerb as well - product was well priced, they had a nice little promotion and it was shipped relatively quickly. I may need to sign up for auto ship for myself and my family for this product. I promise, I am in no way affiliated w/this company- just a person delighted with a product that actually works (love the liquid vitamins - I do not like large pills and these flavorless liquids makes it painless).
I have been using this brand of vitamin D3 with K2 for several years and I can say that it works very well. I highly recommend taking vitamin D3 always together with K2, as this is the only way to ensure that the vitamin will not be deposited in the wrong places in the body. If you have absolutely no concerns about your gut health, then you may be able to take vitamin D alone. However, I strongly recommend taking it with K2 to be on the safe side. This particular product is very convenient, as it comes in a form that is easy to measure and take. Thanks to this brand for creating such a great product!
| Variant | |
| size | 30ml |
