I am skinny dude with a high metabolism. Never able to gain weight for the past 30 years.

Last month, I started on my first bulking mission. I fired up myfitness pal app to track my daily calorie intake.

Before mission
Weight : 50.1kg
Height 168cm
Age : 31

14 days mission
Weight : 52.5kg
Gym : 3-4 times / week
Calorie intake per day : Try to hit 2.5k (Most of the time left 100-200 calories)
Supplements : ON Serious Mass at night to top on top what I've eaten the whole day.

Considering that I have gained up to 2.3kg now, I think I am on the right track. Shall update more next week.

Umm, i just took 1 scoop tho but I did try to increase snacks intake. hehe.

Not too sure on my tdee. I have tried the calculator at iifym. It says TDEE 1925 Cal/Day.