About 50 years ago, the cereal industry tested powdered eggs and came up with the findings that it caused high cholesterol. Then they marketed the hell out of that. When I was at a doctor's office getting my blood pressure tested, I asked the nurse if it was true that your brain is 75% cholesterol. She said "try 80" I was shocked. I asked "what does the cholesterol lowering drugs to to your brain?" She said "exactly" She wouldn't talk much, but she definitely was conflicted in her job.