Is Alfredo sauce healthier than marinara? Alfredo sauce is undoubtedly not healthier than marinara sauce. 100 g of Alfredo sauce has 500 calories; it is one of the most fattening sauces. It is made of cream, cheese, and butter. Half a cup has almost 500 kcal and 50 grams of fat, more than half the fat for a 2000 kcal diet.
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Marinara sauce is vegan by nature, with just four simple ingredients: