Dear Thyagarajan Sir, Thank you for your thread. I read the writings of Mahaperiyava recently forwarded by a friend. Perhaps, that is the talk Smt. Jayasala is referring to. Sankaracharya clearly explains the scientific benefit behind the South Indian cuisine being served in a particular order. He even explained the rationale of eating in banana leaf. What fascinated me is Periyava's revelation that eating yogurt every day prevents us from visiting Dentists often.