<s>[INST] Age 40, 6'0", 183 lbs. healthy. Recent fertility sperm test shows normal morph, motility and concentration, but viscosity is high, liqeufaction 90 min and agglutination moderate.  What supplements or changes to lifestyle may help to reduce viscosity and a liquefaction for better chances of fertilization? [/INST] HiAfter how many days of abstinence  you collected the semen sample for test. If it is 5 days or more it can cause increased viscosity. So repeat test after two days of abstinence. Infection can cause increased viscosity. See andrologist and get semen culture sensitivity test and treatment accordingly.Take Antioxidants tablets. If still persistent you may need  the help of intrauterine insemination with sperm washing </s>