Your search should include keywords from your research protocol, plus keywords to search for Refinement, Reduction, and Replacement of animals. The following is a sample search. Feel free to copy and paste the search string below for alternative keywords (in black letters including the parentheses), replacing the words in teal with your own relevant keywords and connecting them with the Boolean connector AND:
hypertension AND diet AND (In Vitro OR Toxicity Tests OR Animal Use Alternatives OR Animal Testing Alternatives OR Animal Testing Reduction, Refinement and Replacement OR Animal Welfare OR Cell Line OR Lab on a Chip OR Animal Rights)