I like the way Mr Story is presenting in full honesty this story!
I agree with him totally[ in principle] and definitely would spread the message
Beetroot does not always work for every person, for whatever reason.
Magnesium is extremely important, and a shortage can be dangerous, A remarkable effect on blood pressure I have not seen [yes, for constipation and cramps and sometimes to help one sleep]
Breathing: amazing for direct effects!! I advise a bit different technique but his suggestion is for sure very good.
Acupressure may help in the long run and only after applying the pressure for 5 minutes or more. not by just a short, “tiny bit” of pressure
I would like to add one very rapid trick which may belong to “breathing:: YAWING, BUT REALLY as if you are very sleepy! Works on the spot.

Thanks, Mr Story!