Pack size: 120 capsules
Serving: 1 capsule
Servings per pack: 120

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Doctor Life

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K&D Mega

In black seed oil · K2 180 mcg · K1 20 mcg · D3 4,000 IU

97,99 zł

Helps maintain healthy bones and teeth
Supports normal absorption and utilization of calcium and phosphorus
Supports normal muscle function

Overview

One daily capsule for healthy adults over 75. K&D Mega combines vitamin D3 with K2 MK-7 and K1 to support healthy bones, muscles, immune function, and normal blood clotting. Delivered in cold-pressed black cumin oil and taken once daily with a meal.

At the heart of the formula / K&D Mega

Thoughtful support. Clear purpose.

01Helps maintain healthy bones and teeth
02Supports normal absorption and utilization of calcium and phosphorus
03Supports normal muscle function
04Supports normal immune system function
05Vitamin K contributes to normal blood clotting

Doctor Life / 01

K&D Mega

Made for your daily routine.

Vitamin D supports normal calcium and phosphorus absorption and utilization, blood calcium levels, bones, teeth, muscle function, and immune function. Vitamin K contributes to normal bones and blood clotting.

The formula combines vitamins K1, K2, and D3 in one oil-based capsule. The K2 is menaquinone-7 derived from Bacillus subtilis natto fermentation. Each bottle contains 120 capsules, a 120-day supply.

Doctor Life / 02

K&D Mega

Why do these ingredients matter?

Vitamin D supports calcium absorption and utilization, normal blood calcium levels, bones, teeth, muscles, and immune function. Vitamin K contributes to normal bones and blood clotting. This formula combines D3, K2 MK-7, and K1 and is intended exclusively for healthy adults over 75.

Doctor Life / 03

K&D Mega

What research informs K&D Mega?

Vitamins D and K have complementary nutritional roles in bone health. A meta-analysis of eight randomized trials examined their combined use and reported changes in selected bone mineral density and osteocalcin measures. These ingredient findings complement the established roles of vitamin D and vitamin K; they do not establish the effects of this finished formula.

Ingredients / Doctor Life

Every ingredient. Clearly explained.

Each ingredient, its form and quantity — in one place.

Serving1 capsule

Ingredient amounts for the servings shown in the table.
Ingredient	1 capsule
Vitamin K2 MK-7	180 µg
Vitamin K1	20 µg (27%*)
Vitamin D3	100 µg (4,000 IU) (2,000%*)
Black seed oil	300 mg

*NRV: Nutrient Reference Value

Full ingredient list

Black cumin seed oil (Nigella sativa); vitamin K2 (menaquinone-7) from Bacillus subtilis natto fermentation; vitamin K1 (phylloquinone); vitamin D3 (cholecalciferol from lanolin); capsule shell: bovine gelatin, glycerol (binding agent), water.

How to use

Part of your daily rhythm.

How to use

Take 1 capsule once daily with a meal. For broader support for the heart, circulation, and bones, take with Doctor Life Antarctic Krill Oil Omega 3 and Arteries Regenerum.

Important information

Do not exceed the recommended daily serving. Food supplements should not replace a varied diet. A balanced diet and a healthy lifestyle are recommended. Store in a cool, dry place out of reach of young children. Do not use if you take anticoagulants that act as vitamin K antagonists, such as warfarin or acenocoumarol. This food supplement is intended exclusively for healthy adults over 75.

Science & sources

Understand the formula.

Vitamins K and D have complementary roles in bone health. Vitamin D supports normal calcium absorption and utilization and helps maintain normal blood calcium levels. Vitamin K supports normal bones and blood clotting. These publications examine their combined use in bone and calcium-focused nutrition.

These publications concern the studied ingredients or formulas. They do not all evaluate the finished Doctor Life product, and research results do not guarantee individual outcomes.

01The combination effect of vitamin K and vitamin D on human bone quality: a meta-analysis of randomized controlled trials

Xiaotong Kuang, Chunxiao Liu, Xiaofei Guo, Kelei Li, Qingxue Deng, Duo Li

Food & Function (2020), 11(4), 3280–3297. DOI: 10.1039/C9FO03063H; PMID: 32219282.

A meta-analysis included eight randomized trials and 971 participants. Combined vitamin K and D supplementation was associated with favorable changes in total bone mineral density and osteocalcin carboxylation. The findings provide context for combining these vitamins in a bone-focused formula.

Read publication ↗

02Scientific Opinion on the substantiation of health claims related to vitamin K and maintenance of bone and blood coagulation

EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA)

EFSA Journal (2009), 7(9), 1228. DOI: 10.2903/j.efsa.2009.1228.

EFSA experts confirmed a cause-and-effect relationship between vitamin K intake and the maintenance of normal bones and blood clotting. These established functions provide context for including both K1 and K2 MK-7 in the formula.

Read publication ↗

03The Importance of Vitamin K and the Combination of Vitamins K and D for Calcium Metabolism and Bone Health: A Review

Jan O. Aaseth, Trine Elisabeth Finnes, Merete Askim, Jan Alexander

Nutrients (2024), 16(15), 2420. DOI: 10.3390/nu16152420; PMID: 39125301.

This review describes the complementary roles of vitamins D and K in calcium metabolism and bone health. Vitamin D supports calcium availability, while vitamin K helps activate proteins important for bone tissue. The publication provides a biological rationale for their combined use.

Read publication ↗

FAQ / K&D Mega

Good questions. Clear answers.

Talk to us ↗

Why combine K2 MK-7, K1, and D3?

Vitamin D3 supports normal calcium absorption, bones, muscles, and immune function. Vitamin K supports normal bones and blood clotting. The formula provides both K1 and K2 MK-7 alongside D3.

Why include black seed oil?

Vitamins K and D are fat-soluble. Black seed oil provides an oil base for the capsule. Take it with a meal as directed.

How long does one bottle last?

Each bottle contains 120 capsules, a 120-day supply at one capsule daily.

Who is K&D Mega intended for?

This supplement is intended exclusively for healthy adults over 75. The recommended serving for this group is one capsule once daily with a meal.

What makes the combined capsule convenient?

K&D Mega provides D3, K2 MK-7, and K1 in a single daily serving, simplifying the routine for its intended users.

Can this be taken with anticoagulants?

No. Do not use this product if you take vitamin K antagonist anticoagulants, such as warfarin or acenocoumarol.

How should I store K&D Mega?

Store in a cool, dry place, out of reach of young children. Do not exceed the recommended daily serving.