Efficacy of Weiaijia Goat Milk Powder Weiaijia Goat Milk Powder is a high-quality goat milk powder product from New Zealand. Its biggest advantage lies in its unique nutritional ingredients and rich effects. First of all, Wei Aijia goat milk powder contains high-quality goat milk protein, which is one of the 8 essential amino acids required by the human body and can help enhance the body\’s immunity.