WeightWorld Vitamin D3 4000 IU + K2 125 mcg is a two-in-one tablet in a 365 tablet bottle that covers a full year of daily use, supporting calcium absorption and directing that calcium toward bone. Pairing the two vitamins is not label decoration: vitamin D3 raises the share of calcium the body absorbs, while vitamin K2 determines where that calcium goes once it reaches the bloodstream. It suits anyone who spends most of the day indoors or keeps covered outdoors and therefore gets little sun exposure.
What Is Vitamin D3?
Vitamin D3, or cholecalciferol, is a fat-soluble vitamin and the same form human skin produces on exposure to UVB radiation. In truth it behaves more like a steroid hormone than a conventional vitamin, since it passes through two activation steps, first in the liver and then in the kidney, before binding its receptor inside the cell nucleus. It is measured in international units, and this tablet supplies 4000 IU.
Benefits Of Vitamin D3 And Vitamin K2
- Calcium absorption: Vitamin D3 contributes to efficient calcium uptake from the intestine and to maintaining normal blood calcium levels.
- Directing calcium to bone: Vitamin K2 contributes to bone health by activating the proteins that bind calcium into bone tissue.
- Muscle function: Vitamin D3 contributes to maintaining normal muscle function and strength.
- Immune support: Vitamin D3 is tied to the work of immune cells, which carry receptors specific to it.
- Normal blood clotting: Vitamin K contributes to the normal blood clotting process.
- Mood and energy support: Low vitamin D stores are associated with lower energy, especially through seasons of limited sun exposure.
Active Ingredients
- Vitamin D3 (cholecalciferol) 4000 IU: Raises the efficiency of intestinal calcium absorption and supports bone, muscle and immunity.
- Vitamin K2 as menaquinone-7 (MK-7) 125 mcg: Activates vitamin K-dependent proteins that route calcium into bone tissue.
How Vitamin D3 And K2 Work In The Body
Vitamin D3 is converted in the liver to 25-hydroxyvitamin D, the storage form, and then to its active form in the kidney, where it binds the vitamin D receptor inside intestinal cell nuclei and triggers production of calcium transport proteins across the gut wall, raising how much calcium enters the blood. This is where vitamin K2 takes over: it is the cofactor for the enzyme gamma-carboxylase, which activates osteocalcin in bone and matrix Gla protein in vessel walls. Activated osteocalcin grips calcium and fixes it into bone tissue, while matrix Gla protein discourages deposition in soft tissue. Vitamin D3 opens the door for calcium; vitamin K2 maps its route.
What Sets This Formula Apart
The WeightWorld formula uses the menaquinone-7 form of vitamin K2, which stays in circulation far longer than menaquinone-4, whose concentration falls within hours, so one tablet a day gives continuous coverage instead of repeated doses. The ratio of 125 mcg K2 to 4000 IU D3 brings both fat-soluble vitamins into a single dose swallowed once. The 365 tablet count covers a full year of uninterrupted daily use, which matters for a vitamin whose effect depends on consistency rather than any single dose. The delivery form is a small, easy-to-swallow tablet.
Who Is This Product For?
- Anyone who spends most daylight hours in offices or indoors.
- Those who keep most of the body covered outdoors, limiting skin sun exposure.
- People past forty, whose skin synthesises vitamin D less efficiently.
- Anyone already taking vitamin D alone who wants K2 added in the same tablet.
- Those seeking a year-long bottle that removes repeat purchasing.
How To Use
Take one tablet of Vitamin D3 4000 IU with K2 125 mcg daily with a full glass of water, preferably with a meal or as directed by a healthcare professional. Taking it with a meal containing some fat is not a marginal detail, because both vitamins are fat-soluble and their absorption depends on dietary fat in the intestine and the bile release that accompanies it. Do not exceed the recommended daily dose.
Product Details
- Form: Tablet.
- Vitamin D3 per tablet: 4000 IU.
- Vitamin K2 per tablet: 125 mcg.
- Count: 365 tablets.
- Brand: WeightWorld, United Kingdom.
Frequently Asked Questions
Why is vitamin K2 combined with vitamin D3?
Vitamin K2 is combined with vitamin D3 because each handles a different stage of the calcium journey: D3 increases how much calcium moves from the intestine into the blood, and K2 activates the proteins that bind that calcium into bone tissue. Arranged this way, 4000 IU of D3 with 125 mcg of K2 becomes a functionally complete pairing rather than two vitamins sharing a tablet.
What is the difference between vitamin K2 as MK-7 and MK-4?
Menaquinone-7 carries a longer side chain that gives it a much longer half-life in the blood than menaquinone-4, whose concentration drops within a few hours of intake. That is why a single daily 125 mcg dose of MK-7 provides continuous coverage, while MK-4 requires repeated doses across the day.
Should vitamin D3 be taken on an empty stomach?
Vitamin D3 is not recommended on an empty stomach, since it is fat-soluble and its absorption depends on dietary fat in the meal and the bile secretion that accompanies it. The same rule applies to vitamin K2, which is why the daily tablet is best tied to the fattiest meal of the day with a full glass of water.
Cautions
- Not intended for pregnant or breastfeeding women.
- Not intended for anyone under 18 years of age.
- Consult a physician when taking long-term medication, particularly anticoagulants such as warfarin given their known interaction with vitamin K, and in cases of elevated blood calcium or impaired kidney function.
- Not to be used as a substitute for a balanced diet, and do not exceed the recommended daily dose.
Your satisfaction matters most to us. If you are not happy with your purchase for any reason, you can return it within 30 days of delivery for a full refund.
How do returns work?
Contact us on WhatsApp +962 7 8162 0564 or by email at qtrat.al97ah@qtrat.net
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We refund the full amount — including the delivery fee.
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Yes. Everything is imported from the United States, the United Kingdom and Turkey, and the Best Before date is printed on each product page.
How long does delivery take?
One to two working days, to every governorate in Jordan.
What does delivery cost?
Free on orders over 29 JOD. Below that, a small delivery fee applies, which our team confirms with you when the order is placed.
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Cash on delivery, Visa or Mastercard at the door, or CliQ. PayPal is available on request — message us and we will send you a payment link.
Can I return a product?
Yes. Our policy is deliberately flexible: if the product is not right for you, for any reason, you get a full refund including the delivery fee. Details in our Refund Policy.
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