The Effect of Cholecalciferol in Pre-frail Elderly

Inclusion Criteria: 1. Pre-frail elderly 2. Capable to understand and carry-out the instruction Exclusion Criteria: 1. Allergic to cholecalciferol, calcium, or its components 2. Hypercalcemia (total serum calcium \> 10,5 mg/dL) 3. Unwilling to stop using drug contain vitamin D or vitamin D analog or calcium 4. Using steroid or NSAID routinely 5. Acute illness during inclusion period, eg. pneumonia, stroke attack, acute exacerbation of chronic obstructive pulmonary disease, asthma attack, hypertensive urgency/emergency, acute decompensated heart failure 6. Having condition that can affect measurement of handgrip strength and gait speed, eg. hemiparesis, severe pain in extremities 7. Hepatic cirrhosis, malignancy, autoimmune disease, nephrolithiasis, malabsorption syndrome (eg. chronic diarrhea) , diabetes mellitus with HbA1c \> = 8% in the last 3 months, diabetes mellitus with obvious sign and symptoms of catabolic decompensation (polyphagia, polydipsia, polyuria), chronic kidney disease stage IV-V or decreased renal function with estimated glomerular filtration rate \< 30 ml/minute/1,73 m2 8. Using drug that can affect vitamin D absorption, eg. bile acid sequestrants 9. Cognitive impairment (Abbreviated Mental Test score \< 8) 10. Depression (Geriatric Depression Scale score \> = 10) 11. Unwilling to join the study