Is there a link between my constipation and heart rhythm problems? Very interesting exposition of the epigenetics of food and effects of diet; Probiotic imprinting before birth and much more about the complexities of the microbiome; Numb toes is a symptom of small fiber peripheral neuropathy -- the role of toxic metals; A vegan asks about cholesterol and vitamin B12; Atrial fibrillation in a very athletic 70 yr old man -- physiology explained and device security discussed; Analyzing Cholesterol numbers and the problem of statins for lowering cholesterol