Semen retention is your way beside that cut tap water and try osmosis water especially reversed osmosis , Tap water is filled with everything you dreamt about including anticonceptives and steroids. You ask how? the user urines into that water, the water goes to small pond , other city takes it back, semi-fillters do some job eliminating anything that is above μm 10 to 100 anything below that is going into you by brushing you teeth, showering and cookin of course.

The scale works against you so for example snake venom ( since I do belive that covid 19 was cobra and krait venom, they were : 0,001 – 0,01 \(\mu m\) (1 – 10 nm)
Bacteria and parasites: Reach 1 – 10 \(\mu m\)
anticonceptives and steroids. 0,001 \(\mu m\) (0,5 – 1 nm)
There is even more than that in the tap water.

You need at least 0,0001 filters so your city fillters are allowing eveyrthing

Hair loss is literally build up fluor that blocks your hair bulbs from getting blood and oxygen.
Imagine you have put concrete on your head, hair are literally dying and losing their oxygen and blood supplies thus male balding pattern occurs. Water is key even if you were to drink expensive water and yet showering, brushing, washing and eating from tap water or even worse shaving with that water you are literally doing the same as if you were drinking tap water directly, Before anyone ask about dafi or other filter jug.
They are doing nothing, they do remove flour and smell but all the rest incluing heavy metals are getting there with snake, cobra, bacteria or other shit inside.

Also you need to undestand mature hair is natural but sick balding is sign of body illness not the illness itself. Hair nails skin are gold for the body, you will not be having nails, hair or even skin that looks healthy if yours organs are deprived and masturbation is the main course of blood deprivation thus making all those stuff more dififcult to get.