Dino fuel is good as a nutritional supplement.
I personally doubt anything actually enhances colour beyond what any quality /healthy diet would do. Colour is largely a factor of genetics, as far as I know.
This statement is true to some extent. Genetics, husbandry, etc. play a huge role on the overall appearance and health of your chameleon.
However, we say they are color enhancers because of the ingredients within each product. For example, marigold. Marigolds contain numerous antioxidant carotenoids that give the petals their bright orange and yellow colors. An antioxidant is a compound that helps protect the cells from damage caused by free radicals, or hazardous molecules. The primary Free radicals are the by-products of normal body functions or environmental factors like pollution. Free radicals can damage cells to the point that they damage DNA, and can lead to disease and various forms of cancer. High intake of antioxidants helps combat free radical damagey carotenoids in marigolds are lutein and zeaxanthin, often paired together, and lycopene. A boost in these carotenoids will enhance appearance, or color.
A second example is spirulina algae. Spirulina Arthrospira is a planktonic blue-green algae (Cyanobacteria) found in warm water alkaline volcanic lakes and is rich in raw protein and seven major vitamins: A1, B1, B2, B6, B12 (one of the best natural sources for B12, although the bioavailability its B12 is in dispute by many researchers), C and E.
It naturally contains beta-carotene, color enhancing pigments, and whole range of minerals. In addition, Spirulina has a 62% amino acid content and contains all essential fatty acids and eight amino acids required for complete nutrition. Evidence as recent as 2007 shows even more proof as to the profound anti-oxidant properties of Spirulina. If you have ever had reef fish. You know spirulina and other macro algaes are a huge part of many of these fishes diets. Cut out the spirulina and you will start to see the fish lose vibrancy. Eastern cultures have been using these ingredients for a very long time for medicinal purposes and only in the past decade have western cultures even began to understand their valuable properties.