Apr 19, 2025: 10 mg/drop is now available! Please only buy this if you don't mind hot water bathing your K2 bottle every so often!
Apr 11, 2025: We're back with the new bottles! Note that the new bottles are slightly bigger, but we kept the number of drops, IU's per drop, and the total amount of K2 MK-4 total the same. Sorry for the delay!
Feb 17, 2025: It's best practice to shake the bottle before dispensing drops to ensure an even distribution of vitamin content with each drop. Remember to squeeze the dropper bulb while shaking.
We are currently shipping 2 mg/drop bottles with the following info (updated Apr 16, 2025):
(see 10 mg/drop bottle info after)
Serial Number (s/n) | Date Range Sold | Lab Results & Info |
---|---|---|
B0271 - B0336 | Apr 11, 2025 - onward |
Vitamin K2 MK-4 Powder:
Extra Virgin Olive Oil, Organic:
Bottle & Cap:
|
See all previous batch's COAs. |
We are currently shipping 10 mg/drop bottles with the following info (updated Apr 19, 2025):
Serial Number (s/n) | Date Range Sold | Lab Results & Info |
---|---|---|
C0059 - onward | Apr 16, 2025 - onward |
Vitamin K2 MK-4 Powder:
Extra Virgin Olive Oil, Organic:
Bottle & Cap:
|
See all previous batch's COAs. |
Cost per mg of VK2 MK-4:
- ~2 mg/drop, 860 drops
- 1,756 mg at $0.0336/mg
- ~10 mg/drop, 860 drops
- 8.729 mg at $0.0286/mg
Notes:
- Please keep bottle in a dark & cool place and keep the lid tightly closed (don't over-hulk it though).
- 10 mg/drop bottles: the K2 powder can crystallize out of solution at lower temperatures ~60ºF (15.5ºC). This should not be a problem during the warmer months of the year (depending on where you live), but also be aware that if the A/C is blowing directly in the vicinity of the bottle, it can also crystallize. Placing the bottle in a warm/hot water bath for a bit should dissolve it back into solution. Remember, after bathing to squeeze the dropper bulb and shake the bottle before using. Please ONLY purchase this if you don't mind hot-water-bathing your K2 bottle when necessary!
Specifications (updated Apr 19, 2025, changes underlined):
- Ingredients: Extra Virgin Organic Olive Oil (EVOOO), Vitamin K2 MK-4 powder.
- you may see small particles of olives in solution, this is considered normal as part of the unfiltered milling process.
- Excipients: none.
- Vitamin K2 MK-4 Source Material: Derived from geraniol, however because of the chemical reactions and transformations involved, this is considered a synthetic product (as opposed to an extract).
- County of Origin:
- Vitamin K2 MK-4: See table above.
- EVOOO: See table above.
- Certificate of Analysis (COA) available online with every order (why the COA? | view COAs)
- Bottled in an amber glass jar for protection from UV light (why amber?)
All bottle components are made in the USASee tables above for bottle components' country of origin.- Bottle dimensions w/ dropper: 1.25 x 4 in (32 x 102 mm) (diameter x height)
- Dropper lid & bulb materials: See tables above for materials.
- Total weight: 2.58 oz (73.14 g)
- Notes on contents per bottle:
- each VK2 MK-4 2 mg/drop bottle contains:
- 1.756 mg of Vitamin K2 MK-4
21.24221.500 g of EVOOO
- each VK3 MK-4 10 mg/drop bottle contains:
- 8.729 mg of Vitamin K2 MK-4
- 14.620 g of EVOOO
- How did you come up with these ratios?
- There's an extra "buffer" in each bottle to make sure we aren't short changing you:
- 2.1% buffer in the ~2 mg/drop bottle
- 1.5% buffer in the ~10 mg/drop bottle
- Why the 2.1% in the ~2 mg/drop bottle? We wanted to keep the total grams of VK2 and the number of drops the same, so we kept those constant.
- There's an extra "buffer" in each bottle to make sure we aren't short changing you:
- By our calculations, there are ~860 drops of solution in each bottle.
- However, drop weights and drop counts vary depending on several factors. Please see the section in our FAQ regarding average drop weights that we currently use. Please also see our post regarding drop counts for more details.
- You may only be able to dispense ~845 drops using the dropper, with the remaining left as a film on the glass bottle and dropper (~15 drops). Use a mini scoop to scrape out the rest, or add a bit more EVOO and shake.
- each VK2 MK-4 2 mg/drop bottle contains:
Disclosures (updated Dec 20, 2024, updates underlined):
- We use glass containers for storage and packaging, although caps and seals are usually made from silicone, plastic, rubber, or LDPE.
- We use amber colored glass or wrap clear glass to block UV rays from reaching contents.
- We store bulk powder sealed in the freezer.
- We store EVOO at room temperature (74 - 78°F or 23.3 - 25.6°C) away from sunlight.
- We steam sterilize all glass bottles, containers, caps, liners, and utensils before using them for storage or bottling using distilled water.
- We prioritize the material of
packing utensilsall containers and utensils that come into contact with product in this order: glass, ceramic, stainless steel, plastic, aluminum. - Bulk powder we receive is usually stored in an aluminum or plastic container. We immediately weigh and move it to a glass container.
- More information about our process here.
- Please also review our Terms and Conditions before placing an order.
Are we missing something that you'd like to see? Let us know!
- Kaneki M, Hosoi T, Ouchi Y, Orimo H. Pleiotropic actions of vitamin K: protector of bone health and beyond? Nutrition. 2006 Jul-Aug;22(7-8):845-52. doi: 10.1016/j.nut.2006.05.003. PMID: 16815498. Link
- Traber MG. Vitamin E and K interactions--a 50-year-old problem. Nutr Rev. 2008 Nov;66(11):624-9. doi: 10.1111/j.1753-4887.2008.00123.x. PMID: 19019024. Link
- Nishiguchi T, Yamashita M, Maeda M, Matsuyama K, Kobayashi T, Kanayama N, Terao T. Improvement of vitamin K status of breastfeeding infants with maternal supplement of vitamin K2 (MK40). Semin Thromb Hemost. 2002 Dec;28(6):533-8. doi: 10.1055/s-2002-36697. PMID: 12536346. Link
14 Reviews Hide Reviews Show Reviews
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The Best
Richard’s commitment to quality and transparency is second to none. While most supplement companies include excipients, give you minimal information about what’s in the package, and are not concerned with the quality of their product, Lark Supply clearly takes all of these concerns to heart. The result is a truly astounding product that I have personally recommended to my friends and family.
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Products are Great. Richard is Great.
I can't say enough good things about Richard (owner of Lark), and I'm ecstatic that he started making two of the products that I use the most (vitamin K and D). Thanks for the lengthy R&D, Richard. Cheers.
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Most Affordable High Purity Vitamin K2
I have used numerous other vitamin k2 products, and this one delivers. I noticed the same effects as other high purity K2s and was able to use in conjunction with calcium carbonate for increasing bone density. I also calculated out the price and Lark Supply outperforms other brands on price per milligram as well. Looking forward to continued development of their product.
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K2 Drops
This is an extremely rare find. To have a product like this in pure olive oil, That’s also tested and verified, is incredible. Just started using, looking forward to positive results
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Top Notch Product
Simply the best… and Richard’s commitment to quality, honesty and transparency is second to none. Very admirable.