It is quite difficult to overdose vitamin D: "... healthy adults in a clinical setting, receiving 50,000 IU of vitamin D2 once every 2 weeks (equivalent to ap

It is quite difficult to overdose vitamin D: "... healthy adults in a clinical setting, receiving 50,000 IU of vitamin D2 once every 2 weeks (equivalent to approximately 3,300 IU/day) for up to 6 years, maintained 25(OH)D concentrations of 40–60 ng/ml (100–150 nmol/l) without any evidence of VDT [vitamin D toxicity]. Those findings were consistent with the observation by Ekwaru et al. (17) that Canadian adults who ingested up to 20,000 IU of vitamin D3 per day had a significant increase of 25(OH)D concentrations, up to 60 ng/ml (150 nmol/l), but without any evidence of toxicity" https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6158375/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6158375/