Due to the increasing number foreigner every year, foods and waters in the lodges and camps are very hygienic. While trekking and expedition at high altitude, you can expect hygienic traditional food and pure water to drink. The teahouses, lodges, and hotels provide the best food and waters for the trip and also encourage the use of organic food products. However, it is best to take utmost precautions and carry medicines of minor health issues like nausea, diarrhea, and headaches. Also, it is highly recommended to not buy food and water at the local vendors in the country.