I'm Late 30's And I Start To Have Hair Shedding

[hswells]

I haven't had any single hair loss in the past,
even during shower, my hair didn't loss or fall.

but starting from this July, I loose about 50 hairs/per day.
in the morning, afternoon, and evening.

I do not get stressed, and I had blood test and everything is normal.
As you can see in the picture, 2 hairs split and follicle stock together.

Is this main cause of hair loss ?

 

[abcdefg]

Nah. Dont over analyze it. Your hair is getting thinner and bald spots or its not. If it is then its male pattern baldness otherwise dont worry about it. If you have male pattern baldness you will recognize it because you will see obvious thinning/bald spots where there were none before.
Shedding hairs is normal its just when they dont grow back you have a problem. Whether its stress, the air, or Tuesdays hair loss is all treated the same right now.