Vitamin D has long been known as a companion of bones and joints, helping to increase calcium absorption and support immunity. However, when vitamin D is abused, especially through functional foods and high-dose supplements, the body can face serious consequences, even causing damage to vital organs such as the kidneys, heart and brain.
According to clinical nutritionist Lauren Panoff, vitamin D deficiency is no longer rare, especially in the context of people increasingly tending to arbitrarily supplement functional foods. "When there is too much vitamin D, the body absorbs too much calcium, leading to increased blood calcium, a condition that can cause digestive disorders, dehydration and damage to soft tissue," Ms. Panoff warned.
Anorexia, nausea and abdominal pain
Initial symptoms often come from the stomach: nausea, loss of appetite or vomiting. This is a direct result of high blood calcium, causing irritation to the digestive system. Even, according to Dr. Sohaib Imtiaz (Explorer of preventive medicine at Harvard University, USA), this condition can persist and confuse patients with common digestive diseases.
Fatigue, irritability, loss of energy
Excess vitamin D not only affects physical health but also disrupts electrolyte, making users feel lethargic, easily irritable, and have difficulty concentrating. When calcium levels are too high, the body is forced to regulate blood filtration and excretion, creating a feeling of lethargy for a long time.
High numbers and the risk of dehydration
When the kidneys have to increase their activity to remove excess calcium, the patient therefore has to urinate more than usual, leading to dehydration. This is especially dangerous for the elderly or people with a history of kidney disease. Dry eyes, dry lips, headaches and constant thirst are warning signs that need attention.
Osteoporosis and unusual calcium buildup
It sounds ironic, but taking too much vitamin D can cause pain in the bones. The reason is that calcium is no longer taken into bones but begins to deposit in soft tissue, joints or blood vessels. According to Dr. Imtiaz, this is one of the potential causes of kidney stones, atherosclerosis and arrhythmia, which is especially dangerous if not detected early.
confusion and neurological problems
Another serious manifestation is neurological disorder: confusion, disorientation, and confusion. "Excess calcium disrupts neurotransmittion and affects cognitive function. If not treated promptly, it can lead to prolonged cognitive disorders," Imtiaz added.
