Ключевые слова: 2, adolescent, age, aging, analyzing, anti, antiaging, antioxidant, apoptosis, beautiful, blood, body, care, carnitine, chemistry, d, diagnosis, disease, e, e2, elder, estradiol, estrogen, exam, fat, female, genetic, health, healthcare, hematology, hormone, laboratory, male, medical, medicine, old, oxidant, plasma, research, sample, science, serum, sex, teen, teenager, test, testosterone, tube, vitamin, wellness, young,