Post-Thrive Question

@Jeff Serven just out of curiosity what do you consider normal levels of D3? Hi my name is Kirsten btw. New to Thrive  thanks for the program!

10000000000

Hi Kersten, Welcome to Thrive!

Vitamin D is complex.  Unfortunately not all the science is in on vitamin D yet.  We know deficiency is bad and that half the population is likely deficient.  There are some concerns that too much vitamin D may lead to vascular calcification and atherosclerosis.  So I would temper Jeff's enthusiastic and non-committal answer with a note of caution.  Up to 10,000 iu daily has been shown to be safe in multiple studies, and blood levels of 30-100 have been proposed as normal.  However, there is growing concern that the upper limit of this may be harmful from a vascular standpoint, which is why the current guidelines (conservative as it is, suggests not supplementing for above 30).  Many will say this is too low and I agree with them, but it is important to know why there are concerns about taking too much.  First do no harm...

Solid info

Ah Man... I was supplementing to get 10 billion Vit D level since Jeff's post. 

And you were still way below the recommendation.