The internet says a million things about what to eat and what not to eat in regards to impacts on acne. For instance:

• Refrain from dairy products.
• Refrain from food heavy in unsaturated fat.
• Refrain from too much sweet.
• Consume fresh food (raw fruits & vegetables) but no cabbage and cauliflower.
• No Alcohol
• Etc.

My question is:

Is there really any relation between food consumed and the occurrence of acne?