Not necessarily. The answer would depend on your particular weight loss goals and how hungry you get between meals. If snacking is important for you and you think it ensures that you don’t overeat at your next meal, perhaps you can choose to have your fill of peanut butter for the day spread out as snacks in the early afternoon and early evening.
There’s even something to be said about eating peanut butter before bed. While you have to watch out for how much you consume (because peanut butter is a high-calorie food), the nutritional profile of peanut butter – niacin, magnesium, omega-3 and omega-6 fatty acids, and vitamins B6 and E — also includes tryptophan, an amino acid linked with better sleep. Furthermore, although not specific to peanut butter, a 2015 study published in the journal Nutrients found that snacking on protein-rich foods before sleep helped with muscle protein synthesis overnight and morning metabolism in men. A 2013 study done on active college-aged men and published in the British Journal of Nutrition had similar results.
But if you want to take the classic route of keeping peanut butter for breakfast, this is great for weight loss too. Again, the satiating nature of this nut butter is great at keeping you full till lunchtime. Starting the day off strong is important for some people and their weight loss journeys.