My guess is
improving iodine status and other micronutrient status, plus knocking back infections are the major contributors.
Not exact matches
Donate blood,
improve mineral
status including
iodine, get more phospholipids (egg yolks, liver) and less oil & cream, and add more starches and fruits.
have been doing phd for over 6 months and have implemented
iodine supplementation as well as eating brazil nuts to
improve thyroid health (not knowing anything about thyroid
status).