Many alternative and complementary medicine practices are viewed with skepticism within traditional/mainstream medicine. why is this the case?

Adebate between dietitian and nutritionist the difference between certification and licensing within these two professions

Group of genes that encode molecules found in all body cells, creating a biochemical “fingerprint” that serves as the “id” for cells so that they are marked as “self” a) deoxyribonucleic acid (dna) b) entry inhibitors c) major histocompatibility complex (mhc) d) non-nucleoside reverse transcription inhibitors (nnrtis)

What are the two things that all sociologists do in their studies?