Vitamin D3 functions in the body much like a hormone, regulating a wide range of metabolic processes.

Its scientifically confirmed roles include:

• Maintaining healthy bones and teeth
• Supporting normal immune function
• Supporting proper muscle function
• Maintaining the proper level of calcium in the blood

Vitamin D3 is one of the most important fat-soluble vitamins, essential for skeletal health, muscle function, and immune performance. It is naturally synthesized in the skin under UVB exposure, but in many regions its production is insufficient for most of the year. This makes supplementation an effective way to achieve adequate levels. Vitamin D supports the proper absorption and utilization of calcium and phosphorus, directly influencing bone mineralization. As a result, maintaining optimal vitamin D status is especially important for adults and older individuals, whose calcium metabolism may be less efficient.

Vitamin D also contributes to healthy immune system function. Scientific literature describes its influence on T-lymphocytes and macrophages – key cells involved in immune defense. Adequate vitamin D levels support proper immune responsiveness.

For athletes and physically active individuals, vitamin D is additionally important due to its role in muscle performance. Research suggests that appropriate vitamin D levels may support muscle tissue function, strength, and endurance. For this reason, supplementation is commonly recommended for people who train, have sedentary lifestyles, or spend most of the day indoors.

Vitamin K2 MK-7 sourced from natto is the most active form of vitamin K.

Its key functions include:

• Supporting the maintenance of healthy bones
• Contributing to normal blood coagulation

Vitamin K2 MK-7 is one of the most bioactive and bioavailable forms of vitamin K, characterized by a long half-life, which supports stable levels in the body. Typically obtained from natto – a traditional Japanese fermented product – it is highly effective in activating proteins that regulate calcium balance. Vitamin K supports bone health by activating osteocalcin, a protein that enables proper binding of calcium to bone tissue. This makes vitamin K2 particularly important for individuals aiming to support bone mineralization and maintain healthy skeletal structure.

Vitamin K also plays a central role in blood coagulation. It is necessary for the activation of several clotting factors that contribute to proper hemostasis. Adequate intake is therefore essential for normal physiological function.

Scientific literature also highlights the importance of vitamin K2 in regulating calcium distribution outside the skeletal system. Research indicates that MK-7 activates proteins responsible for calcium transport, supporting its correct utilization in the body. Due to this action, K2 MK-7 is often paired with vitamin D3. Their synergy is well described in scientific studies focusing on calcium metabolism.

Benefits of Vitamin D3 and K2 Supplementation:

• Supports bone mineralizationi
• Contributes to normal calcium and phosphorus metabolism
• Supports proper blood coagulation
• Supports normal muscle function
• Helps maintain normal immune function
• Natural sources (lanolin + natto)
• Softgel form with MCT oil for high absorption
• High potency – 4000 IU D3 and 100 μg K2 MK-7

7Nutrition Vitamin D3 4000 + K2 MK-7 FORTE combines two essential vitamins whose complementary action is well documented in scientific literature. The product supports immune health, bone strength, calcium metabolism, and physiological coagulation processes. The softgel form with added MCT oil enhances bioavailability, and the dosage aligns with current supplementation standards.

The description of the product’s effects is based on the properties of its individual ingredients. The content provided is educational and reflects findings from scientific studies on these substances. It does not constitute official health claims.