I get so confused about oils

Is there anyone out there really that knows the absolute truth about healthy foods?  Could this person really possess the highest life force available and for how long will it last?  I have suffered from dry skin my whole life.  My skin is dull, flaky, and white.  Yet the italian person standing next to me has rich looking smooth skin.  This is partly due to the type of oils in their diet.  The italians are sticklers for their olive oil, and my family, german, english, irish american used vegetable oils.  Even though canola oil can actually be bad for you, it was in the veggie oil mixes.   We all suffered from dry skin.  The italian family will not have dry skin.