Osteoporosis is a disease characterized by bones become brittle and porousThere is a greater risk of fractures even from low-impact bumps or falls. It particularly affects postmenopausal women and the elderly, but it can occur in other population groups. Some people are more prone to it than others (due to genetics, age, sex, medication, pre-existing conditions, etc.), but in any case, take care of your diet and lifestyle It is key to reducing the risk. Among these habits, monitoring vitamin A, vitamin D, and calcium intake plays a fundamental role.
Vitamin A, bones and the risk of osteoporosis
Studies have found a link between high intake of preformed vitamin A and lower levels of bone mineral density. When bone mineral density decreases, the skeleton loses strength and a risk factor for osteoporosisFor this reason, controlling your intake of foods that contain this type of vitamin A is one of those lifestyle changes that can help protect your bones in the long term.
Preformed Vitamin A It is found mainly in foods of animal origin. (such as liver and organ meats, some whole dairy products, or certain supplements), in concentrated supplements, and in fortified foods. Scientists have not yet been able to determine the exact cause of the relationship between excess preformed vitamin A and bone loss; other hormonal and mineral metabolism factors are suspected to be involved, so future research will shed light on the mechanisms involved. It is known that chronically high consumption can promote a increased bone turnover and a loss of mineral mass.
Meanwhile, if what we want is Preventing osteoporosis at any ageIt is prudent to limit very high doses of preformed vitamin A from non-prescribed supplements and prioritize safer sources of vitamin A.
Beta-carotene: a safe way to get vitamin A
An effective strategy for protecting the skeleton is to ensure that most of the vitamin A in the diet comes from fruits and vegetables rich in beta-carotenesuch as sweet potatoes, carrots, kale, spinach, or other bright orange and dark green vegetables. Beta-carotene is a precursor: once ingested, the body converts it into vitamin A according to its needs.
Unlike preformed vitamin A, high beta-carotene intake does not pose any health risksince the body regulates its conversion. In addition to contributing to vitamin A intake, these foods provide fiber, antioxidants, and other micronutrients that promote overall health, which translates into a more favorable metabolic environment for maintaining bone mass.
The role of calcium and vitamin D in bone health
Beyond vitamin A, scientific evidence indicates that Two nutrients are essential for bone architectureCalcium and vitamin D. Calcium is the main structural mineral of the skeleton, while vitamin D regulates intestinal calcium absorption and its balance in the blood, in addition to modulating hormones such as parathyroid hormone (PTH), which directly influence bone turnover.
When vitamin D intake or synthesis is low, levels of its active metabolite in the blood decrease and the intestinal absorption of calciumThe body responds by raising PTH levels, which increases the release of calcium from bone to maintain a stable blood concentration. This secondary hyperparathyroidism is associated with greater bone loss and increased risk of fractures.
Also, do not forget get enough calcium through foods such as milk, yogurt and other dairy products, nuts, legumes, calcium-fortified tofu, and leafy green vegetables. As for vitamin D, dietary sources include egg yolk, salmon, tuna, oily fish and offal such as liverModerate sun exposure also contributes significantly to the skin's synthesis of vitamin D, although this production can be limited by age, the use of sun protection, skin tone, or a predominantly indoor lifestyle.
When diet and sun exposure are not enough, various studies have shown that some adequate levels of vitamin D in the blood They are associated with better bone mineral density and a lower risk of osteoporotic fractures, especially in older adults and postmenopausal women. For this reason, many clinical guidelines include vitamin D as part of the basic treatment for osteoporosis, usually combined with calcium.
When to consider supplements and how to integrate them into prevention
Even when doing everything possible through diet and sun exposure, there are cases where there is no noticeable improvement in bone density or where it persists low vitamin D levelsThis often happens in older people, those who spend little time outdoors, patients with digestive diseases that hinder absorption, or those who take certain medications.
In these situations, it is important Do not start supplements on your own.especially of preformed vitamin A, as prolonged excess could harm the bone. The recommendation is discuss with the doctor The possibility of taking vitamin D and calcium supplements, and even measuring serum 25-hydroxyvitamin D concentration to adjust the dose, are options. Guidelines from various scientific societies indicate reference ranges for these levels and suggest daily doses of vitamin D that generally range from a few hundred to a few thousand international units, always adapted to each specific case.
It is also important to consider that calcium and vitamin D supplements may present side effects in some profiles (such as digestive discomfort, risk of kidney stones in predisposed individuals, or interactions with other medications). Therefore, the ideal balance consists of first optimizing diet and lifestyle, and using supplements as... personalized support toolsupervised by healthcare professionals.
Taken together, prioritizing plant-based sources of vitamin A such as beta-carotene, ensuring adequate calcium and vitamin D intake through food and sunlight, and resorting to supplements only when necessary, constitutes a comprehensive and sustainable strategy to take care of your bones and reduce the risk of osteoporosis and fractures throughout your life.