Which aspect determines a health sources credibility?

Is a sparkling water healthy for your body? What is the main cause of a happy person? What layer of the eye absorbs stray light rays? Is caning good? While taking spironolactone for hair growth can one donate plasma? Different types of physician assistants? What is the most annoying thing you could encounter at the workplace? What are the health benefits of pickling onions? My 3 year old son's back of neck has been hurting for 3 days. why? What should you do if you suspect someone is slowly poisoning you? Is neurobion can be taken by kids age 10? Who talks more men or women? Can you take methodone after the expiration date? How do you treat esophageal varices? When should antacids be administered in relationship to food and other medications? Do freckles go away with age? Does people burp? What does a dream mean if you grew feathers out of your legs? Why do people feel ticklish? How do antioxidants work?