[dizhn]

What do you think about the thresholds themselves? How often are they updated usually with new research?

[seba_dos1]

Based on what I've seen while researching the topic for my own health purposes: the thresholds differ in various sources, but in general research appears to suggest that they may tend to err on the too low side rather than too high (there's quite a lot of headroom between what's often considered excessive and what's actually known to be toxic, while the lower end is much fuzzier).

[andruby]

I'm an engineer, not a clinical biologist or researcher. I have no idea.

On a personal level: I used to struggle with "winter dip". Taking Vitamin D supplements, as well as moving to South Africa, has both improved it a lot