5. Metabolisms are all pretty similar. Metabolisms have as great a range as cars. Some of us are Jaguars and some of us are SUVs. You need to match the right kind of gas (food) with the right kind of engine (metabolism).

Is it possible to boost your metabolism? Find out.

6. Blood type does not make a difference. Actually, blood type does play a part in weight loss. People with certain blood types are more likely to be allergic or sensitive to certain foods. Those with type O, for example, are far more likely than other types to be hypersensitive to dairy.

Find out about the blood type diet on Diets A-to-Z.

7. A balanced diet will provide you with everything you need. It's possible to have reasonable health without supplements, but it's virtually impossible to have optimal health without them.

Don't know where to start? Try the Shape Up Community Challenge® supplement list.

Got a question or comment for Jonny? Post it on the Shape Up message board!