Buy Vitamin D: How to Choose the Best Supplement for Immunity, Bone Health, and Hormonal Balance

Vitamin D is a fat-soluble substance that regulates calcium and phosphorus metabolism, strengthens the immune system, and supports the health of bones, muscles, the cardiovascular and endocrine systems. Most people are deficient in vit. D, especially during the fall and winter or when not getting enough sun exposure. That’s why it is important to regularly take high-quality vitamin D supplements. In this article, we’ll explain why it’s needed, who should take it, the best forms, how to use it, and where to buy certified products in Ukraine.

Scientific Research on the Benefits of Vitamin D

1. Immune Support

Martineau et al. (2017) analyzed data from over 10,000 participants across different countries. They found that regular intake of vit D significantly reduced the risk of acute respiratory infections. The effect was especially strong in people with initially low vit D levels — their risk of illness decreased by more than 50%. Daily doses of 1000–2000 IU were more effective than high-dose boluses. Researchers recommend daily or weekly preventive intake [1].

2. Preventing Bone Mass Loss

Holick MF (2007) emphasized that vitamin D is critical for bone health. It activates proteins responsible for transporting calcium from the intestines to the bloodstream. Deficiency leads to impaired bone mineralization, resulting in osteopenia, osteoporosis, or rickets. Among older adults, sufficient vit D reduces hip fracture risk by up to 30%. In children, deficiency can cause spinal curvature and skeletal deformities. Preventive D3 intake is recommended at any age [2].

3. Muscle Function and Endurance

Owens DJ et al. (2015) studied the effects of vitamin D on muscle strength and athletic endurance. They found a direct correlation between vit D levels and physical adaptation in athletes. Deficiency was linked to muscle cramps, weakness, and reduced endurance. After 8 weeks of supplementation at 4000 IU, grip strength improved, recovery after exercise accelerated, and creatine kinase levels dropped — indicating less muscle damage. Researchers noted vitamin D’s ergogenic potential in sports [3].

4. Mood and Emotional Well-Being

In a clinical review, Jorde R. and Grimnes G. (2011) explored the link between vitamin D levels and emotional health. People with deficiency were more likely to experience depression, anxiety, and sleep disorders. Supplementation with 2000 IU of vitamin D3 daily for 6 weeks significantly improved mood and reduced depressive symptoms — especially during the low-sunlight fall/winter season. Vitamin D influences serotonin production — the happiness hormone. Regular use may help with seasonal affective disorder (SAD) [4].

5. Type 2 Diabetes Prevention

Pittas AG et al. (2019) conducted a large-scale study with over 2400 participants. Results showed that in people with prediabetes, daily intake of vitamin D3 at 4000 IU reduced the risk of progressing to type 2 diabetes by 12%. The effect was strongest among those who reached optimal blood levels — above 50 nmol/L. Improved insulin sensitivity was also observed. Researchers suggest including vitamin D in comprehensive metabolic disease prevention programs [5].

6. Reducing Autoimmune Disease Risk

In one of the largest randomized trials (CASTLE Study, 2022), vitamin D3 was shown to reduce autoimmune disease risk. After 5 years of daily 2000 IU intake, the risk was reduced by 22%. Conditions that were delayed or alleviated included rheumatoid arthritis, psoriasis, and Hashimoto’s thyroiditis. The likely mechanism: stabilizing immune response and reducing chronic inflammation. Authors highlight the safety and importance of preventive D3 supplementation for those with a genetic predisposition. 🔗 Costenbader KH et al. (2022). BMJ. 376:e066452

Top MST® Products with Vitamin D

✅ MST® Vitamin D3 1000 IU 120 softgels — mild daily formula for vitamin D deficiency prevention.

✅ MST® Vitamin D3 – 3000 IU — mid-range dose suitable for moderate deficiency.

✅ MST® Vitamin D3 – 4000 IU — for strong support of immunity, muscles, and hormonal balance.

✅ MST® Vitamin D3 – 5000 IU — high-dose option for confirmed deficiency (as prescribed by a doctor).

✅ MST® Vitamin D3 + K2 MK-7 60 softgels
✅ MST® Vitamin D3 + K2 MK-7 120 softgels — unique combo for calcium absorption and vascular calcification prevention.

How to Take Vitamin D Correctly?

• Best taken with food, as it is fat-soluble.
• Recommended dose: 1000–4000 IU per day, depending on blood levels, lifestyle, and age.
• For severe deficiency, a doctor may prescribe 5000 IU or more for a short course.
• Duration: fall/winter or year-round if medically necessary.
• Avoid combining with calcium unless needed — excess may lead to vascular calcification.

Where to Buy Vitamin D in Ukraine?

You can buy vitamin D3 at the official MST® Nutrition online store. All supplements are certified, properly dosed, and highly rated.

The best deal for buying vit D, with delivery across Ukraine.

Delivery available in:

• Kyiv, Lviv, Odesa, Kharkiv, Dnipro, Zaporizhzhia,
• Ivano-Frankivsk, Chernivtsi, Rivne, Ternopil, Khmelnytskyi, Poltava, Uzhhorod and other cities and towns.

European customers can order from the MST® warehouse in Germany.

Sources:

1. Martineau AR et al. Vitamin D supplementation to prevent acute respiratory infections. BMJ. 2017;356:i6583.
2. Holick MF. Vitamin D deficiency. N Engl J Med. 2007;357:266–281.
3. Owens DJ et al. Vitamin D and the athlete. Sports Med. 2015;45(3):365–376.
4. Jorde R, Grimnes G. Vitamin D and mood disorders. J Steroid Biochem Mol Biol. 2011;127(1–2):215–220.
5. Pittas AG et al. Vitamin D supplementation and prevention of type 2 diabetes. N Engl J Med. 2019;381:520–530.
6. Costenbader KH et al. Vitamin D and risk of autoimmune disease — a randomized trial. BMJ. 2022;376:e066452.