WeightWorld Vitamin D3 K2 (MK-7) Review

2000IU Cholecalciferol + 200mcg Menaquinone — 365 Tablets, 1 Full Year Supply

• Vitamin D3: 2000 IU per tablet
• Vitamin K2: 200 mcg MK-7 per tablet
• Form: 1 tablet/day
• Tablets: 365
• Rating: 4.6 / 5 ★

What Is WeightWorld Vitamin D3 K2?

WeightWorld Vitamin D3 K2 is a combined supplement delivering 2000IU of Cholecalciferol (Vitamin D3) and 200mcg of Menaquinone (Vitamin K2 MK-7) in a single daily tablet. The bottle contains 365 tablets — a full year's supply at one tablet per day. It holds Amazon's Choice status with a 4.6-star rating from over 7,400 verified reviews and has been purchased by more than 3,000 customers in the past month alone. The product carries EFSA-approved health claims and is manufactured in Great Britain.

Why Combine Vitamin D3 and K2?

Vitamin D3 and Vitamin K2 are often discussed separately, but they work together in a critical biological partnership. Understanding why they are combined in one tablet requires knowing what each does independently — and what happens when one is present without the other.

Vitamin D3 — 2000IU per tablet

Vitamin D3 (Cholecalciferol) is the form of Vitamin D the human body produces naturally through sun exposure. It is responsible for:

• Regulating calcium and phosphorus absorption in the intestine
• Supporting the maintenance of normal bones and teeth (EFSA-approved claim)
• Contributing to normal immune system function
• Supporting normal muscle function

A dose of 2000IU is a mid-to-high maintenance dose, appropriate for adults — especially those with limited sun exposure, darker skin tones, or who live in northern latitudes where sunlight is insufficient for adequate synthesis during winter months.

Vitamin K2 MK-7 — 200 mcg per tablet

Vitamin K2, specifically in the MK-7 (Menaquinone-7) form, is the most bioavailable and longest-acting subtype of Vitamin K2. Its primary role is to direct calcium where it belongs:

• Into bones and teeth — supporting mineralisation and density
• Away from soft tissues and arterial walls — where calcium deposits can cause harm

This is why combining D3 with K2 matters: D3 increases calcium absorption, and K2 ensures that calcium is deposited in the right places. Taking high-dose D3 without K2 may raise circulating calcium without adequate direction.

MK-7 vs MK-4 — Why the Form of K2 Matters

• Half-life: MK-4 ~1–2 hours · MK-7 ~72 hours
• Dosing frequency: MK-4 multiple times/day · MK-7 once daily
• Bioavailability: MK-7 higher
• Source: MK-4 synthetic · MK-7 natural (natto fermentation)

MK-7 is the preferred form for supplementation because its longer half-life ensures stable blood levels from a single daily dose. WeightWorld uses MK-7, which aligns with current best practice in supplement formulation.

EFSA-Approved Health Claims

• Vitamin D contributes to the maintenance of normal bones
• Vitamin D contributes to the normal function of the immune system
• Vitamin D contributes to the maintenance of normal teeth
• Vitamin K contributes to the maintenance of normal bones
• Vitamin K contributes to normal blood clotting

365 Tablets — A Full Year Supply

At one tablet per day, a single bottle covers an entire year. This eliminates frequent reordering and makes it straightforward to build a consistent supplementation habit. The gluten-free formulation makes it accessible to a broader range of dietary needs.

Who This Product Is Designed For

• Adults with limited sun exposure or who live in northern climates
• Those focused on long-term bone density maintenance
• Individuals seeking a combined D3 + K2 MK-7 in a single tablet
• People who prefer a once-daily supplement with a full-year supply
• Anyone following a gluten-free diet

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