Brief Answer:
Detailed history required

Detailed Answer:
Hi,
I understand your concern thanks for contacting health care magic,


See to understand the body weight the best parameter is BMI i.e body mass index
We can understand if a person is underweight overweight or normal.
Its calculated by height and weight,

Please send me your height and weight details.

See,
stature i.e bony framework of your body is formed till approx 21 yrs it remains the same,

You can put on muscle by doing weight lifting exercises(gyming) with good protein diet and supplements,

You have mentioned that you were going to gym,
Please mention since when?? For how many hours you do workout per day??

Please do mention which type of diet do you take veg ,nonveg??

Please mention your all the details i will be able to advice you best possible way and diet to improve your weight,

Awaiting your reply

Regards

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Brief Answer:
Dont be concerned

Detailed Answer:
Thanks for giving detailed reply,

Hi,
According to the values you provided your BMI comes to be 20.1 that comes in normal range,

BMI:

Underweight- below 18.5

Normal weight- 18.5 - 24.9

Over weight - 24.9 - 30

Obese - above 30

So your weight is in normal range,


If you want to build muscle mass,
Restart your gym and do more weight lifting exercises to built your muscle,
If you take nonveg diet include eggs meat and fish, chicken in your daily diet they contain high protein.

If you take more of veg diet,
soyabean, all pulses(dals) ,dairy products contains high protien include them in diet more often,

Protein supplements most commonly used is whey protein you can use it,
15-20 gm after workout,

Only taking high protein diet wont help you built muscle mass,
you will have to be doing regular gyming

Hope this information helps

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