Question

What are the symptoms of low levels of vitamin D?

Vitamin D insufficiency
Vitamin D insufficiency can be easily overlooked - patients can be asymptomatic or have vague symptoms such as tiredness or general aches.1,2

Vitamin D deficiency
Musculoskeletal pain and weakness are typical symptoms of vitamin D deficiency in adults.1 

References 

1. Pearce S & Cheetham T. Diagnosis and management of vitamin D deficiency. BMJ. 2010; 340:b5664.
2. Vitamin D deficiency including osteomalacia and rickets. Available at: www.patient.co.uk/health/vitamin-d-deficiency-including-osteomalacia-and-rickets