What are products that use or are
made of oil.

Many of our personal care products are derived from petroleum including perfume, hair dye, cosmetics (lipstick, makeup, foundation, eyeshadow, mascara, eyeliner), hand lotion, toothpaste, soap, shaving cream, deodorant, panty hose, combs, shampoo, eyeglasses, and contact lenses.

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

dude you should crop your image so only the question shows. but   can you explain it better