Larisa Alekhnovich wrote a Candidate’s thesis «Indicators of lipid metabolism in aged and old men, suffered from ischemic heart disease and chronic obstructive bronchitis» (2003). She has more than 100 scientific publications, devoted to the issues of clinical chemistry, pathochemistry of lipid metabolism, laboratory diagnostics of ischemic heart disease, metabolic bone diseases, pathology of hemostasis and etc.
She is a member of Belarusian Biochemical Society, Belarusian Society of Clinical Lab Specialists. Larisa Alekhnovich is a member of Presidium of the Belarusian Public Association «Let’s fight against osteoporosis together! ». She is a member of the editorial review boards of the journals: «Laboratory diagnostics. Eastern Europe» and «Medical knowledge». Larisa Alekhnovich is a secretary of the medical and diagnostic subcommission of the Republican Qualification Commission of the Ministry of Health of the Republic of Belarus.