Over time many health questions will be answered. Please don't take any of this as professional advice. However, the Spirit of Prophecy is a good guide for some of us.
No. The quotes listed will clearly show that surgeries can be okay.
No! Man's original diet was plant-based and resulted in people living for hundreds of years. After the flood God allowed eating of meat, but resulted in a much shorter lifespan. In the last days messages have been given that strongly encourage a plant-based diet. This diet has been strongly supported many years the findings of science.
Yes! Here is what one person did to gain victory over smoking.
Large quantities of milk and sugar eaten together are injurious. Health reform in this aspect needs to be done carefully.