Hello,
Not gaining weight could be out of tow reasons
1. Your BMR is more means what you eat is less than what calories you burn through out whole day.
2. There could be any underlying disease or disorder which you have to check. If this the case then your diet will proceed accordingly.
And for planing your diet i need to know some of your information apart from above tow things then only diet plan will be working. Other wise everything will go waiste. I need to know information like your hight,weight, your past medical history if any, your lifestyle, your eating pattern and food habits
Next Steps
Contact me on direct practo consultation.I will surely help you out. All thor doubts about nutritional requirements of your will be clear in direct consultation.