Hello there. First of all I would like to tell you that weight gaining works differently for different people based on their basal metabolism. People with a high bmr( basal metabolic rate) would have a hard time gaining weight despite trying various methods. Can you please elaborate your symptoms? Is the yellowing only in your stools? Have you noticed yellowing in your eyes or skin? Do you have history of
liver diseases in your family. Have you lost weight in this three months or are trying to gain extra weight? Can you also tell me your daily diet?
Next Steps
Consult a dietitian to make a customised diet plan for you and to identify proper weight gaining workouts. Avoid supplements and protein till the yellowing of stool disappears.