Photo: sxc.hu

If America could choose a diet, what do you think it would be? Low-carb? Low GI? High protein? Or maybe just fast food and soda. Americans might not have a traditional diet to fall back on, but other cultures rely on time-tested foods and patterns of eating that not only keep their weight in check, but appear to prevent disease as well. Forbes as a few examples:

• Okinawa, Japan: In Okinawa, people don't stuff themselves. Instead, they practice portion control and load up on seasonal vegetables, tofu, fish and green tea. Breast and prostate cancer levels are significantly lower in Okinawa.
• Cameroon, West Africa: Eating a mostly vegetarian diet that's rich in fiber and includes fermented foods -- like pickles and yogurt -- means Cameroon has a lower colon cancer rate.
• Iceland: Icelanders, naturally, dine on plenty of fish, but also grass-fed lamb and wild game. These types of meat are rich in omega-3s, which might be why Icelanders -- despite their long winters -- are protected from Seasonal Affective Disorder, a type of depression.
• Crete, Greece: Here's the classic Mediterranean diet -- legumes, nuts, olive oil, fresh fruits and vegetables and whole grains. They make for a heart-healthy diet, which is probably why heart disease is so low in Crete.

While Americans might find it easy to adopt some of these eating practices, researchers say that we're unlikely to see the benefits unless we understand the diet and stick to it. For that reason, most diet experts recommend the Mediterranean diet, which is most familiar to Westerners.

Even if you don't eat like an Okinawan, you can still practice their portion control strategy of only eating until you're 80 percent full!