Now it is 2 1 century, from science and technology to microbiology. If you eat plants, you can kill them. I read a paper. Studies have shown that plants also feel pain, but meat can still be eaten, but the energy utilization rate is low. That lecturer must be over sixty years old. Of course, meat will accumulate certain toxins, but it also depends on where the liver is more toxic. I don't believe anyone can live to be over 200 years old. If Zhang Sanfeng really lived to be 2 years old. 00 years old, then I believe in God. Health care should pay attention to exercise and nutrition acquisition. Is this a scientific way of nutrition? Modern people are not short of vitamin C if you only eat meat.