@DMS What Lifegiving store is selling is not actually NDT - they say that but it’s thyroid glandular. So it’s weaker, not as consistent and more $$$ vs real NDT or Cytomel/Cynoplus.
That said still worth a try if you can’t get anything else. There is a ton of info on dosing from Ray himself in the Peatarian email exchanges wiki... if you’re not banned like me you should still have access.
The problem with glandular is there’s no way of knowing how many mcg of T3 and T4 it has. Personally with NDT I dose 1/2 grain at a time since Ray said you don’t want too much T3 at once. Starting dose is usually 1/2-1 grain a day, then monitor temps/pulse and increase dose if needed after about 2 weeks.