Can I have some suggestions with what tests to ask for please

[Noelnoel]

My son’s just come home after being in lockdown with his girlfriend and I suddenly had a lightbulb moment with regard to his weight gain. I don’t know why it hadn’t occurred to me before but you’ve recently helped both my daughter and me with interpretations of our blood test results. I have Hashimoto’s and my daughter is looking as though she’s headed for hypothyroidism

I’ve been taking my son’s temperature each morning after having started reading Dr Broda Barnes’ book and it’s fascinating and enlightening but I’m not sure what tests son should ask for when doctor calls tomorrow. His temperature is persistently 35.7 or lower and as I understand it, this is highly indicative of hypothyroidism

I know he should ask for D3, ferritin, folate and B12 but what specific iron and thyroid tests will help you get a picture of what’s going on with him

Would really appreciate a list of what’s crucial. He goes away next week for 18 months to start his pilot training and he’s going to need his wits about him. He doesn’t seem all that sharp at present

Thanks for reading, I’d really appreciate any help you can offer