I did not realize not taking it for 2.5 months would cause my hair fall to go into overdrive. If I continue again for the next 2 yrs will I regain what has fallen in the last 2.5 months?

Fully bald father and a son with a full head of thick hair?  What do you think Dr. Rassman?

Inheritance from the mother’s side of the family is likely here.  He could have inherited his father’s maternal hair as well.

I took my first 0.25mg of fin yesterday, and today I can’t get an erection. I have no idea if its the compounding fear in the back of my head to check if I have side effects that is preventing my dick to get hard, but I struggle to get “into” porn that would usually get my blood pumping to my member almost immediately. Again, have no idea if its fin or if its in my head, but still I want to wait out the finasteride and see if my dick gets hard again. If it does, then its the fin that caused the ED.

With ED developing in just one day, I suspect you are dealing with a powerful placebo effect, rather than a drug effects; nevertheless, it should be out of your system in less than one month, but I have seen lingering effects last 2-3 months on occasion.  I would stop the finasteride. 

In a recent published paper in the Journal or Nutrients, by Ysinghua University in Beijing, identified a new link between men who drink excess amounts of soda (sugary drinks with or without artificial sweeteners) and even energy drinks with hair loss. The study was large.  We have long blamed sugar and artificial sweeteners for many human diseases.  This report is a new alarm showing that excess sugars can even be an accelerant for balding. 

Is there a known correlation between patient size, weight, height and appropriate oral min dosage or does it vary regardless you think?

I am not familiar with weight or height considerations for oral minoxidil. A dosage between 1.25 and 2.5 mgs daily is the correct dose with the least potential cardiovascular side effects

It is unusual for 30 year old men to reverse hair loss on finasteride alone.  This man may have experienced a late onset hairline recession which would more likely reverse. 

Is genetic balding being caused by an inflammatory response? So what about practices that reduce inflammation vs taking medication to suppress DHT?

There are conditions called Lichen Planopilaris or Frontal Fibrosing Alopecia which can cause balding in men. These autoimmune diseases are now being recognized in men who present with balding and a lot of itching. The diagnosis is made by biopsies of two areas, the frontal area where the balding is occurring and the donor area in the back of the head. There is no formal proof that genetic balding itself is an inflammatory disease so the standard approach to DHT management at the hair follicle level is still our main treatment modality.