Morley talks with Dr. Ben Edwards about vitamin A (retinol) deficiency and the consequences of that including autism, circadian rhythm dysfunction, and HPA axis (our stress response pathway) dysfunction.

They also discuss how taking vitamin D supplements diminishes vitamin A levels.

Other covered were:

• what are normal blood levels of vitamin D
• how do labs like Quest determine what “normal” is?
• oxidized LDL is a better predictor of heart disease than Total Cholesterol and LDL
• the need to eat real food with good fats like butter, eggs and animal fats