Nutrigain Plus Chocolate Flavour Powder is a nutritional supplement, but its suitability for a 15‑year‑old depends on her overall health, growth needs, and diet. At this age, a balanced diet usually provides sufficient nutrition, and supplements are generally considered only if there are concerns such as underweight, poor appetite, or diagnosed nutritional deficiencies. Because every child’s needs are different, it is important to consult a paediatrician or nutritionist before using any product. They can evaluate whether it is appropriate and guide safe and effective use.