My son is 5 years and 11 months old. He is 109 cm in height and only 16.5 kg in weight. He seems very small in same age group. We mother and father are 160cm and 170 cm respectively. He is very active and always play outdoor games. His diet is also well enough. His growth was affected during 8th month pregnancy and 3.2 kg born. 8 month back we gave amway nutralite powder for around 4 months , growth was 7 cm in that period. But he suffered from acidity , giddiness and nausea frequently. Now we stopped it for last 4 months but growth only 1 cm. kindly suggest for physical growth for weight and height.