There's several different foods that are good to eat when you're on a Keto Diet but the best overall food to eat when on a Keto diet is any types of fish or seafood including Shellfish.
Other foods that are good to eat when you're on the Keto diet are, Cheese, Avocados, Meat and Poultry, Eggs, Coconut, Plain Greek Yogurt and Cottage Cheese.
Vegetables are also good for the Keto diet but make sure the vegetables are low in carbs.
The Keto diet can work great for losing weight but you should be aware that there are some side effects that can come along with the Keto Diet such as Excessive thirst, Frequent urination, Fatigue, Hunger, Confusion, anxiety and/or irritability, Tachycardia, Lightheadedness and shakiness and Sweating and chills.