ADH/Osmololity can be a factor in frequent urination. It is typical for thise with CIRS (biotoxin illness).
This info is copy/pasted from
biotoxinjourney.com/what-is-biotoxin-illness/.
"when low MSH causes ADH to be out of balance with your body’s Osmolality (the ratio of electrolytes to water in your body) you end up urinating frequently, get lots of static shocks, and tend to get dehydrated that then leads to a whole new set of symptoms.
More specifically, when Osmolality gets too high, then the electrolytes are too concentrated and your body should respond by increasing ADH so your body hangs onto water. Unfortunately, folks with Biotoxin Illness will have relatively high Osmolality and yet ADH will be low. In other words, even though your body is dehydrated, you end up having to urinate shortly after having a drink of water. Always being dehydrated hurts your body’s ability to heal.
For example, lets say someone has an Osmolality of 295 (normal range: 280-300 mosmol) and an ADH of 2.5 (normal range: 1.0-13.3 pg/ml). We can calculate what ADH should be for a given Osmolality using a little algebra and the normal ranges. Specifically, if plasma Osmolality (not urine Osmolaity) is 295 then ADH is calculated using the formula ((295-280)/(300-280))=(X/(13.3-1)) >>> (15/20)=(X/12.3) so X=9.225 and ADH should be around 1+9.225=10.225 (+/-) 2.5. Clearly, ADH is way too low for someone that’s fairly dehydrated. In CIRS individuals, it’s not uncommon to find osmolality is in the high range of normal while ADH is in the lower range of normal – you have to look at osmolality and ADH as a pair on the labs."