My son is 2 years and 4 months old. He learned to walk when he was 1 year and 3 months old. We continued vitanova d3 drop for one year since his birth as prescribed by doctor. Then doctor did not advise to continue it. Now it appears he has mild knocked knee when he stands. But he can run and walk normally. He jumps and does all activities normally. The knocked knee appears only when he stands before our eyes. His weight is 11 kg. We showed it to our doctor. She said he may have vitamin d deficiency but did not suggest any medicine or anything. My question is should we give him any vitamin d syrup or what should we do? We give him normal diet as egg, fish, meat, fruit. But we have not yet given him cow milk. We give him pediasure, aptagrow and prohance junior. Should we be worried about this problem or what should we do now?