Not reaching the necessary amount could weaken the immune defenses, but if low levels are not treated, discomfort can also occur.
Serena Coan, Nutritional Therapist, said: “Signs of vitamin D deficiency can be tricky as they are often dismissed as ‘that time of year’.
Some indicators of an early deficiency are hair loss, tiredness and lack of freshness after a full night’s sleep, regular colds, slow healing of wounds and generally feeling exhausted, he said.
“Longer-term signs are aches and pains in the muscles, joints, and bones, which can lead to bone disorders due to insufficient calcium absorption.”
He said symptoms of vitamin D deficiency can take months or years to develop, depending on age, activity and other factors.
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