Welcome to Healthcare Magic Forum
Depends on what they contain, please mention name and contents ( if its mentioned on the pack).
Weight loss/gain depends on what you eat/ how much you are active/ your metabolism
and ofcourse your genes.
Capsules are not an ideal way of gaining weight.
Best and safe way is to exercise and eat right, ie more proteins
. Will help you have more MUSCLE MASS.
You can see a nutrionist for a diet plan
. And a fitness expert for exercise /sports related guidance.
For further queries - firstname.lastname@example.org