Final answer:
In nutritional science, no single study can establish a fact, but a body of evidence is needed. Healthy eating directly impacts physical health, and good nutrition requires a balanced intake of all essential nutrients. Human experimentation can be done ethically in nutritional science.
Step-by-step explanation:
It is false that one study alone can constitute fact in nutritional science. Science is not built on single studies, but rather on a body of evidence that converges to support a certain conclusion. In the field of nutritional science, this involves replicating research outcomes through various experiments and observational studies to arrive at strong conclusions. Moreover, larger sample sizes in scientific experiments generally increase the reliability of the results, making the conclusions more robust.
Healthy eating is important as it relates to the functioning of the body and overall health. Good nutrition depends on a balanced intake of nutrients, which should include a variety of foods to ensure that the body gets all the essential nutrients it needs. Notably, there are experiments that can be ethically conducted on humans, especially in nutritional science, such as controlled dietary interventions.
Lastly, data that does not support a hypothesis is still useful as it contributes to the collective knowledge base and helps scientists refine their research questions or explore different aspects of a problem. In nutritional biology, our understanding has greatly been enhanced by studies such as those done during famines, which contribute to our knowledge of how the body responds to severe nutritional deficiencies.