According to the doctor, the most difficult deficiencies to diagnose are those that rarely appear clinically evident in the early stages , and the most difficult are deficiencies in vitamins D, B12 and B6 .
The expert points out that these five food groups work together to regulate neurotransmitters , the chemicals that transmit messages between nerve cells and the rest of the body's cells. Vitamins B and D, omega-3 fatty acids, magnesium, and zinc also play a crucial role in energy metabolism and supporting the immune system .
Magnesium deficiency can cause irritability, muscle twitching, or irregular heartbeat , and is often attributed to nerves by patients and doctors.
Iron and vitamin D deficiency is usually accompanied by general fatigue, sleep disturbances, hair loss, and brittle nails .
Headaches may be a less obvious sign of magnesium deficiency.
Increased anxiety, nervousness, chills, numbness in the extremities, and mood swings may indicate a deficiency in vitamin B12, folic acid (vitamin B9), or zinc , given the importance of these substances in the synthesis of the hormones serotonin and dopamine .
Dry eyes and reduced vision at night may be a sign of a deficiency in vitamin A or omega-3 fatty acids , which are essential for maintaining the structure of the tear film .
