Ultraclear Diesel Exhaust Fluid (DEF) is a urea-based fluid engineered for diesel engines as the reducing agent in Selective Catalytic Reduction (SCR) systems. SCR systems have been installed to meet all EPA2010 standards on diesel engine vehicles since March or 2010.
Hormonal Side Effects of Melatonin. Hormonal effects are also associated with the use of melatonin supplements. This includes increase or decrease in thyroid hormone, growth hormone, prolactin, progesterone, estradiol, cortisol and others.
Melatonin is a hormone that the body produces naturally to help regulate sleep-cycle functions. Supplementing the body with extra melatonin may cause long-term side effects. Continuous Disruption of the Sleep Cycle Melatonin is produced by the pineal gland.