Do you remember how often and how many times have you taken Antibiotics or any other medications as a child or as adult?
Do you know if you were born by C-section or if your mother have been using any medications before or while she was pregnant?
Any medications while she was breastfeeding you ?
Were you breastfed ?
What do you know about your father ? Was he on any medications/chemicals/exposed to any chemicals at the time you were conceived ? People can be exposed to strong toxic chemicals when working in agriculture (pesticides), factories (fumes), fighting in war (exposure to a wide range of toxins and vaccines), etc.
Try to find answer to those questions.
Do you know anything about vaccines you received as a baby ?
What was your diet during childhood ?
What is your diet today ?
Do you consume industrially produced foods? Sugar ? Alcohol ?