Mediterranean Diet Disadvantages

There are some disadvantages to the Mediterranean diet:

Heavy reliance on carbohydrates, although they are complex carbohydrates with a low GI
Can cause weight gain in some peopl, who are not used to eating so many carbohydrates
May require a complete diet overhaul to start this diet, which can be difficult for some people
Lots of planning to prepare and create meals for this diet
Fish can be more expensive to buy than cheaper cuts of meat

The Mediterranean diet has a heavy reliance on carbohydrates, although they are complex carbohydrates with a low GI

References

de Lorgeril M, Salen P, Martin JL, Monjaud I, Delaye J, Mamelle N. Mediterranean diet, traditional risk factors, and the rate of cardiovascular complications after myocardial infarction: final report of the Lyon Diet Heart Study. Circulation. 1999 Feb 16;99(6):779-85.
Kris-Etherton P, Eckel R H, Howard BV, St. Jeor S, Bazzarre T L, for the Nutrition Committee Population Science Committee and Clinical Science Committee of the American Heart Association. Lyon Diet Heart Study. Benefits of a Mediterranean-Style, National Cholesterol Education Program/American Heart Association Step I Dietary Pattern on Cardiovascular Disease. Circulation. 2001; 103: 1823-1825