Talk to Dietitian/Nutritionist on Underweight

AOA, I am 25 Yrs old female from Karachi with the issue of being underweight .. I have got my medical test done as well to know if there is any underlying medical cause effecting my weight. But all the reports were clear including LFT, Thyroid profile , Stool H Pylori (as Doctor asked). My weight has been stuck at 30KG.. As for my diet, I usually eat every meal which is home cooked but being in professional life sometimes I also have to dine out twice or thrice a month due to official gatherings.. Kindly let me know how it can be treated through Homeopathy.

Thanks.