Final answer:
In Lind's Scurvy Experiment, the sailors' diets were kept the same to isolate the effect of the supplements on their scurvy symptoms.
Factors other than diet, such as hygiene conditions and exposure to diseases, could have affected the outcome of the experiment. The sailors who drank cider had some improvement in their scurvy symptoms because cider contains vitamin C.
Step-by-step explanation:
Lind's Scurvy Experiment
Lind conducted an experiment in which he divided 12 sailors with scurvy into 6 pairs. All the sailors received the same diet, but each pair was given a different daily supplement. The purpose of keeping the sailors' diets the same was to isolate the effect of the supplements on their scurvy symptoms. By keeping the diet constant, any improvement or worsening of symptoms could be attributed to the supplement alone.
Factors Other than Diet
Other factors that could have potentially affected the outcome of the experiment include hygiene conditions, physical exertion, and exposure to other diseases. For example, sailors who were exposed to clean environments and had access to fresh air might have better overall health and a stronger immune system, leading to improved scurvy symptoms.
Improvement with Cider
The sailors who drank cider had some improvement in their scurvy symptoms because cider contains vitamin C. Vitamin C helps prevent and treat scurvy by supporting collagen production and maintaining the health of blood vessels. The sailors who drank cider received a source of vitamin C, which improved their scurvy symptoms.