>For everyone reading this, please make sure to get blood work done before supplementing more than 1000 or 2000 IU per day. rewritten for to be more actionable

>For everyone reading this, please make sure to get blood work done before supplementing more than 1000 or 2000 IU per day. rewritten for to be more actionable: For everyone reading this, make sure to take 1000 or 2000 IU per day since you may be deficient (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6259547/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6259547/). You should, if possible, get a blood test to see if you are severely deficient and if so to take higher doses according to your doctor's recommendation.