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The digestive tract is designed to act as a barrier between the body and potentially harmful substances

These include hypertension, diabetes, arrhythmia, a range of diseases that affect the muscles and valves of the heart, and chronic kidney disease

When Smoking Was Healthy Camel Cigarettes Dubious Health Crusade From 1936-1937, and then occasionally in 1938 and in 1939, Camel ran the For your digestions sake, smoke Camels campaign, which insisted that Camels helped speed digestion by increasing alkalinity perhaps the strangest health claim in all of tobacco advertising history

This is not about collecting the evidence to support your hypothesis, but collecting evidence, weighing it up and testing it to see whether it supports the hypothesis