Chest freezers were often kept in garages and other cold places and worked efficiently (and economically) by not having to fight central heating temperatures. I have read your column for years, and been impressed with the clear explanations you normally provide.
Amino acids are found in animal sources such as meats, milk, fish, and eggs. They are also found in plant sources such as soy, beans, legumes, nut butters, and some grains (such as wheat germ and quinoa). You do not need to eat animal products to get all the protein you need in your diet.
Meat has zero carbs. A variety of foods are appropriate to eat on a low-carb diet. To stay healthy, you need to eat some carbohydrates. Choose carbs that are good for you, such as complex carbohydrates like whole grains, vegetables and fruits.