Millets are small coarse grains with high nutritive value. Snacks play a major role in diet of Indian population. Hence the study was targeted to underweight adolescent girls from 13 to 16 years of age. The millet bar of 50gms was given for 90 days along with the normal diet to 20 adolescent girls. The weight and height were monitored with 30 days interval gap till 90 days. The study concluded that there was a significant increase in BMI at 1% level of significance. The weight was increased and t calculated value is greater than t tab value. Hence supplementation of millet bar is highly significant.