Vitamin D has long been considered one of the key supplements for maintaining health, especially in later life. However, modern research shows that its role is not as universal as commonly thought: it does not prevent cardiovascular diseases or cancer, but remains an important element for other bodily functions.
Why Vitamin D is Important
Vitamin D helps the body absorb calcium, which is necessary for maintaining bone strength and normal muscle function. With age, these processes slow down: physical activity decreases, hormonal changes occur, and inflammatory processes intensify.
This leads to a gradual loss of bone mass and reduced mobility.
Impact on Bones
Studies show that vitamin D does help maintain bone mineral density, but the effect remains moderate.
In people under 65 years old:
- about 600 IU combined with calcium increases bone density by approximately 2%
- increasing the dose does not provide additional benefits
In people over 65 years old:
- 400–880 IU increases bone density by approximately 1%
- taking 800–1000 IU along with calcium reduces the risk of falls
Even a small improvement matters, as bone mass decreases annually with age.
Impact on Muscles
Vitamin D also affects muscle strength, especially in the lower body.
In adults under 65 years old:
- there is no significant impact on arm strength
- leg strength may increase by 6–25%
In people over 65 years old:
- arm strength changes very little
- leg strength increases by 5–20%, improving mobility
This is particularly important for fall prevention.
Why High Doses Are Not the Solution
The common belief that "more is better" does not hold true for vitamin D.
Very high doses, especially when taken infrequently, can not only fail to provide benefits but also increase the risk of injuries. Optimal effects are achieved with moderate and regular intake.
Optimal Approach
Experts recommend adhering to a dosage of about 600–1000 IU per day. In some cases, higher values are acceptable, but only under medical supervision.
Before starting supplementation, it is advisable to check the level of vitamin D in the blood — this will help determine the individual dose.
Role of Nutrition
Vitamin D can be obtained not only from supplements but also from food. For example, one cup of milk contains about 100 IU.
A balanced diet combined with moderate supplementation helps maintain the necessary level of this vitamin.
Vitamin D is not a universal remedy for all age-related problems; however, it plays an important role in maintaining bone and muscle health. With the right approach, it helps preserve mobility and reduce risks associated with age-related changes.
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