The researcher who deals with scientific research that uses human beings must meet the ethical guidelines that guarantee the safety of the participating humans. There are several guidelines that must be applied according to the tests and the elements to which these human beings will be submitted. However, in general, we can affirm that it is the researcher's duty to request the participant's informed consent, without coercing or influencing him to give consent. In addition, the researcher must ensure that the research has a balance between risks and benefits and inform the participant of all of this. The researcher must ensure that the participant receives humane and fair treatment.