Vitamin D3 deficiency is due to living in dark rooms where sunlight does not reach.or a person didn't sit in sun light.

Now a days,our exposure to sunlight is very less,so most of the people are deficient in vitamin D . In our practice only two out ten patients are found to be desired vitamin D levels. I will suggest you to supplement vitamin D 3. Doses and frequency will depend on how much is the level of vitamin D. Please share reports through Practo chat or practo consultation. Let your father sit for at least half an in morning sunlight. For high cholesterol levels, please avoid all kind of fried,bakery,transfat. For further queries and treatment plan connect me through Practo consultation or practo chat. Regards Dr Suman Mohan

Very low vitamin d levels causes Jt Pains,  fatigue,  hairfall and sometimes depressive or mood changes. Vitamin d is there in egg,  fish,  and meat. Best source is exposure to morning sunlight. Supplementation with vitamin d increases it temporarily but sun exposure should be done regularly at least 30min to get sufficient amount. Vitamin d is needed in various metabolic activities.

Causes are many but u have to supplement it immediately. Take to any general physician and take calcium with vit d supplement. High cholesterol must be treated immediately. Blood fpr T3 T4 TSH must be measured.