What does Jack do that you consider to be bullshit?
E.g. water mixed with Himalayan salt and lemon in the morning.
And since I'm mentioning it, Himalayan salt is not better than normal salt. It could also contain more contaminants and it has no iodine (that could not be desirable in some countries).
I speak from personal experience...
I drink just water in the morning and I am out to empty my bowels right after. I don't think that has much to do with Himalayan salt.
What does this mixture of himalayan salt and lemon do that causes the diuretic effect?
“For 10 days a year, he sits in silence at a meditation retreat. Before getting dressed each morning, he experiments with using his home infrared sauna and then an ice bath, sometimes cycling through both several times before he leaves home.”
along the same lines.
Or sauna/ice cold baths?
These activities have both been done for decades/centuries and have the backing of scientific studies.
Lemons contain vitamin C, potassium, fiber, etc.
If you are fasting, it may be a good idea to get those electrolytes. Even if not, this seems like a healthy drink; certainly better what I people see drinking at my office.
People might not want to macro dose iodine, so that rules out table salt.
Most importantly: it tastes good!
From: https://en.wikipedia.org/wiki/Himalayan_salt
And as far as taste go, I can just taste the lack of iodine.
If I had to recommend an alternative, for those that are not doing IF, eat a kiwi (double the amount of vitamin c, way more fibres) and some nuts (magnesium and potassium).