Pack size: 10 mL

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ADEK

Vitamin A • D3 • E • K2

37,99 zł

Supports normal immune system function
Helps maintain healthy bones and teeth
Supports normal muscle function

Overview

Four fat-soluble vitamins with complementary roles. ADEK combines vitamins A, D, E, and K in one complete formula. Vitamin A supports normal vision, immune function, skin, and mucous membranes. Vitamin D supports immune and muscle function, healthy bones and teeth, and normal absorption and use of calcium and phosphorus.

At the heart of the formula / ADEK

Thoughtful support. Clear purpose.

01Supports normal immune system function
02Helps maintain healthy bones and teeth
03Supports normal muscle function
04Helps maintain normal vision
05Protects cells from oxidative stress

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ADEK

Made for your daily routine.

Vitamin K supports healthy bones and normal blood clotting. Vitamin E helps protect cells from oxidative stress. The formula contains vitamin K2 as menaquinone-7 (MK-7) and vitamin E as D-alpha-tocopherol derived from sunflower oil.

All four vitamins are fat-soluble, so we combine them in coconut-derived MCT oil. This brings A, D3, K2, and E together in a small liquid serving. Vitamin D supports calcium and phosphorus metabolism, while vitamin K helps activate vitamin K-dependent proteins, including osteocalcin.

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ADEK

Why do vitamins A, D, E, and K matter?

These fat-soluble vitamins have distinct, complementary roles. Vitamin D supports calcium absorption and normal blood calcium levels. Vitamin K helps activate proteins such as osteocalcin. Vitamin A supports normal vision and immune function, while vitamin E helps protect cells from oxidative stress. One formula brings all four together.

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ADEK

What does the research say about ADEK?

Research has explored the combination of vitamins D and K. A meta-analysis of eight randomized trials reported improvements in some measures of bone mineral density and osteocalcin carboxylation. Pharmacokinetic research shows that MK-7 remains in circulation longer than vitamin K1. In the BEST-D trial, 2,000 IU of vitamin D3 daily for a year increased blood 25(OH)D in older adults. These studies support interest in the ingredients; they do not establish clinical benefits for the finished ADEK formula.

Ingredients / Doctor Life

Every ingredient. Clearly explained.

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

Ingredient amounts for the servings shown in the table.
Ingredient	5 drops
Vitamin A	800 µg (100%*)
Vitamin D3	50 µg (2000 IU) (1000%*)
Vitamin K2	75 µg (100%*)
Vitamin E	12 mg (100%*)

*NRV: Nutrient Reference Value

Full ingredient list

Coconut MCT oil (medium-chain triglycerides); vitamin E (D-alpha-tocopherol from sunflower oil); vitamin A (retinyl palmitate); vitamin K2 (menaquinone-7); vitamin D3 (cholecalciferol).

How to use

Part of your daily rhythm.

How to use

5 drops.

Important information

Do not exceed the recommended daily serving. Food supplements should not replace a varied diet. A balanced diet and healthy lifestyle are recommended. Do not use if you take vitamin K antagonist anticoagulants. Store at room temperature, away from sunlight and out of reach of young children.

Science & sources

Understand the formula.

These publications examine combined vitamin D and K supplementation, the sustained availability of K2 as MK-7, and daily supplementation with 2,000 IU of vitamin D3. They provide context for the forms and amounts in ADEK, although the finished formula was not tested.

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 of eight randomized trials involving 971 participants associated combined vitamin K and D supplementation with increased total bone mineral density and reduced uncarboxylated osteocalcin. Subgroup findings were more favorable for vitamin K2. The studies examined different preparations, not the finished ADEK formula.

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02Vitamin K-containing dietary supplements: comparison of synthetic vitamin K1 and natto-derived menaquinone-7

Leon J. Schurgers, Kirsten J. F. Teunissen, Karly Hamulyák, Marjo H. J. Knapen, Hogne Vik, Cees Vermeer

Blood (2007), 109(8), 3279-3283. DOI: 10.1182/blood-2006-08-040709; PMID: 17158229.

A study in healthy volunteers compared vitamin K1 with vitamin K2 as MK-7. Both were absorbed, but MK-7 had a longer half-life and produced more sustained serum levels with regular use. MK-7 also increased osteocalcin carboxylation. These findings concern the vitamin forms studied, not the finished ADEK formula.

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03Optimum dose of vitamin D for disease prevention in older people: BEST-D trial of vitamin D in primary care

H. Hin, J. Tomson, C. Newman, R. Kurien, M. Lay, J. Cox, J. Sayer, M. Hill, J. Emberson, J. Armitage, R. Clarke

Osteoporosis International (2017), 28(3), 841-851. DOI: 10.1007/s00198-016-3833-y; PMID: 27986983.

A one-year randomized trial in 305 adults ages 65 and older compared 4,000 IU and 2,000 IU of vitamin D3 with placebo. With 2,000 IU daily—the amount in ADEK—average 25(OH)D increased from about 50 to 102 nmol/L, compared with about 53 nmol/L in the placebo group. Seventy percent of participants taking 2,000 IU exceeded 90 nmol/L, without significant abnormal changes in corrected calcium or PTH. The trial did not test ADEK.

Read publication ↗

FAQ / ADEK

Good questions. Clear answers.

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Is 2,000 IU of vitamin D3 a very high serving?

2,000 IU equals 50 mcg of vitamin D3, or 1,000% of the EU NRV. The NRV is not an upper intake limit. EFSA’s adult tolerable upper intake level is 100 mcg (4,000 IU) daily from all sources; this is a limit, not a recommended daily target. Count any vitamin D in other supplements and discuss your needs with a healthcare professional.

Why does ADEK use vitamin K2 MK-7 instead of K1?

MK-7 has a longer half-life than vitamin K1. Human research has found more sustained blood levels with regular use and effects on osteocalcin carboxylation. These characteristics informed our choice of vitamin K2 MK-7.

Does K2 really “move calcium from arteries into bones”?

That phrase oversimplifies the science. Vitamin K is needed to activate vitamin K-dependent proteins, including osteocalcin and matrix Gla protein. It has a role in normal bone physiology and calcium-binding proteins; it does not mechanically transfer calcium from blood vessels into bones.

Is the vitamin A in ADEK beta-carotene?

No. The product contains retinyl palmitate, a form of preformed vitamin A. It does not require the same conversion as beta-carotene. A serving provides 800 mcg, or 100% of the EU NRV. If you are pregnant or planning pregnancy, discuss supplementation and your total preformed vitamin A intake with a doctor.

What does D-alpha-tocopherol mean?

D-alpha-tocopherol is the naturally occurring stereochemical form of alpha-tocopherol, sourced here from sunflower oil. Human research has found differences in the retention and availability of natural RRR-alpha-tocopherol compared with synthetic all-rac mixtures. It identifies the form of vitamin E used in ADEK.

Can I take ADEK with warfarin or acenocoumarol?

Do not combine them on your own. The label states that the product should not be used by people taking vitamin K antagonists such as warfarin or acenocoumarol. Vitamin K2 can affect anticoagulant treatment. Follow your prescribing doctor’s advice.

Why does the formula contain MCT oil?

Vitamins A, D, E, and K are fat-soluble. Coconut-derived MCT oil provides a carrier for all four in one liquid formula. The label does not require taking it with additional fat or a particular meal.

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