it has been debated before whether tren can cause kidney stress or not, generally the response is no because it obviously bypasses your bodies organs, but it has been debated nontheles, in my opinion the dark urine is a consistency linked to tren with some people so i doubt its any form of organ stress due to this compound. In all honesty though, judging your tren by the piss color can be misleading, intake of fluids or vitamins and organ stress caused by oral medication i.e Clen which is somewhat liver/kidney toxic can easily change your urines color, in my experience i didnt note much of a color change in my urine, but i did take B-complex a water soluable vitamin along with a gallon of water per workout and consistently kept hydrated, but everyone reacts different and notices different sides, regardless i still had notable gains from the tren although my piss was clear. Insomnia however along with night sweats is definitley a tren side effect, and can effect some more than others, if you switched your tren and still experiencing this insomnia or sweating then my opinion is that the brand you are now taking is good, but personally i wouldnt compromise my sleep over tren, try some melatonin and if you can get zolpidem or lorazepam that would help a lot in my experience stuff knocks me out cold; it inhibits brain activity, with or without tren.

How much water are u drinking? How many times are you Urinating? I am on Acetate right now and have Dark urine in the morning but after drinking a gallon of water it does noticably get lighter in color. By the second gallon towards the evening its very light in color.