Daily High-Dose Vitamin D3 Supplementation
Berg dismantles mainstream vitamin D guidelines by pointing out that reference ranges (20–30 ng/mL) are based on preventing rickets, not optimizing immunity. He distinguishes between studies using monthly bolus doses (which failed to show benefit) and daily dosing (which is necessary because vitamin D has a short half-life for immune actions). Historical evidence from sanatoriums, where sun exposure and cod liver oil (rich in vitamin D) dramatically improved TB survival, supports this protocol. The protocol is framed as a way to tip the balance in favor of the host when a latent infection is present, rendering the environment inhospitable for TB activation.
Vitamin D stimulates the production of cathelicidin, a broad-spectrum antimicrobial peptide that can directly kill TB. TB's strategy of blocking the vitamin D receptor reduces this pathway, so sustained high concentrations of vitamin D are needed to push signaling through blocked receptors. Additionally, vitamin D modulates overall immune function, and deficiency is associated with a 5-fold increase in the transition from latent to active TB.
I started to look at the studies and differentiate what they actually did in the studies and I found something very interesting. The studies that they said that there's no correlation between vitamin D and TB. They were using monthly doses of vitamin D3.
You need at least 6,000 to 10,000 IUs, not once a month, but every single day.

