Dr Toft brought in this regime for blood testing, the TSH test and T4 therapy over 40 years ago. In 2012 there was a conference in Scotland where he did a U turn and stated that not everyone does well on T4 only guided by the TSH test.
I have the notes from that conference.
If anyone would like it then please email me at firstname.lastname@example.org
All GP's should see this, they are using a regime that the person who invented it does not now agree with! Amazing. Take it with you to your GP.