Alkaline phosphatase, hemoglobin and hematocrit, and creatinine may vary depending on the patient's current sex hormone configuration. Several factors contribute to these differences, bone mass, muscle mass, number of myocytes, presence or lack of menstruation, and erythropoetic effect of testosterone. Many transgender men do not menstruate, and those with male-range testosterone levels will experience an erythropoetic effect. As such an amenorrheic transgender man taking testosterone, registered as female and with hemoglobin/hematocrit in the range between the male and female lower limits of normal, may be considered to have anemia, even though the lab report may not indicate so. Conversely, the lack of menstruation, and presence of exogenous testosterone make it reasonable to use the male-range upper limit of normal for hemoglobin/hematocrit. Using the male-range upper limit of normal for alkaline phosphatase and creatinine may also be appropriate for transgender men due to increased bone and muscle mass, respectively. In these cases the provider should reference the male normal ranges for their lab.
American Laboratories, Inc. is a biopharmaceutical company founded 50 years ago based on our knowledge of providing enzymes, proteins and flavors to various industries. Today, American Laboratories is proud to offer an extensive listing of over 300 products to the Food Processing, Pharmaceutical, Veterinary Health, Nutritional and Diagnostic industries in the United States and over 50 countries around the world. Through our high quality products and customer service, American Laboratories has become an industry-recognized supplier for the products we manufacture.