I am a 58 year old male with a vitamin d deficiency . what strength supplement do you recommend?

50,000.00 unit : Vitamin d deficiency is defined as a 25ohd level less than 20 ng/ml (50 nmol/l). In people whose 25ohd is <20 ng/ml (50 nmol/l), treatment usually includes 50, 000 international units of vitamin d2 or d3 by mouth once or more per week for six to eight weeks, and then 800 to 1000 (or more) international units of vitamin d3 daily thereafter.

Vitamin D: Depends on your level. Many people need 1000 to 10, 000 units per day and the lower the level the more they need. Take enough to get your level to 50-80 per the experts.