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.
The most common side effects of melatonin reported in clinical studies include fatigue, dizziness, headache, irritability, and sleepiness. Other reported side effects that may cause problems the next morning include disorientation, confusion, sleepwalking, vivid dreams and nightmares.