The correct sentence is: 3. It looks like good food. The other two are incorrect because "looks like" should be followed by a noun or noun phrase. Here's how they can be corrected: 1. The food looks good for health (or The food looks healthy). 2. The food looks good for the body (or The food seems healthy for the body).

I would suggest: It's a food that's good for your health. It's a food that's good for your body. It looks tasty/delicious.