You are out to dinner with your friend. you notice that he only orders food and drink items that are red. you think this behavior is odd, so you ask him why he is only ordering red things. your friend tells you that his dad started the "red diet". this diet guarantees that you will lose weight if you only eat red things. in fact his dad has lost 2 kilograms in the past 2 weeks. your friend is amazed by this result and has started the diet. as an educated biologist what caution might you give your friend. be sure your answer includes at least 2 concepts from this session's lab.