I had alot of dental surgery over the summer. My experience with the laughing gas was scary. I felt like I was dying and I could not speak, my insides were shaky, and my heart was racing. I was a second away from going unconscious when my dentist noticed my body going limp. He turned off the gas and had me breathe oxygen. My legs did not stop shaking for 20 minutes and I was freezing. It must of scared him too because he refused to work on me again until I had my blood checked. I knew I was anemic, but I found out at the doctor’s office that I had a Vitamin B-12 deficiency. The laughing gas was sucking more out. It is rare, but for some, the laughing gas is not funny, it can be deadly. I am taking B-12 now and trying to consume it in Vegan Protein Shakes an Spirluina. I feel better. Seems to make me happier and look less tired. I finished my dental work and braved it all with numbing shots instead of the gas.