Product Development and Drug Testing. To predict toxicity, corrosivity, and other safety variables as well as the effectiveness of new products, traditional testing of chemicals, consumer products, medical devices, and new drugs has involved the use of animals.r. Gerhard Zbinden, one of the world's leading toxicologists, once described a standard in vivo test as little more than âa ritual mass execution of animals.â The testing of just one substance alone, be it a potential drug or toxic chemical, can involve using up to 800 animals and cost over $6 million. [1].
Paleness should be distinguished from other causes of prominent white skin 1  : Fair skin is genetically determined skin hue with low concentration of skin pigment (melanin) in the skin.
Paleness should be distinguished from other causes of prominent white skin: 1  Fair skin is genetically determined skin hue with low concentration of skin pigment (melanin) in the skin. 2  Absence of skin tan from sun avoidance. 3  Myxedema (in hypothyroidism) â swelling of under-skin tissues causes pale appearance of the skin.