Peanut butter trial in adults over 60: one lower-body power measure improved

What does peanut butter REALLY do to aging muscles after 60? A randomized controlled trial followed 120 older adults at risk of falling for six months. The peanut butter group improved on one important measure of lower-body performance — but walking speed, grip strength, knee strength, and muscle mass did not significantly improve. And there’s an important detail most headlines leave out: the study used 43 grams of peanut butter per day — close to three tablespoons, not one spoon. In this video, FOOD INQUEST breaks down what the research actually found, why muscle power is different from muscle size and strength, how anabolic resistance changes protein needs after 60, where leucine and magnesium fit into the picture, and what peanut butter can — and cannot — realistically do for aging muscle. ⏱️ TIMESTAMPS 0:00 — What the peanut butter trial actually found 0:53 — Muscle size vs strength vs power 1:35 — Why muscle power matters after 60 2:24 — The 22-watt improvement explained 2:52 — One spoon vs the amount used in the study 3:42 — Why older muscles need more protein 4:43 — Leucine and peanut butter protein 5:11 — Could magnesium explain part of the effect? 5:54 — Important limitations of the study 6:51 — Step 1: Understand the dose 7:20 — Step 2: Pair peanut butter with more protein 7:54 — Step 3: Give your muscles a reason to adapt 8:28 — Choosing peanut butter + safety considerations 8:54 — What one spoon can and cannot do 9:15 — End Research discussed includes: • Effects of Peanut Butter Supplementation on Older Adults’ Physical Function: A 6-Month Randomised Controlled Trial • Moore et al. — Protein ingestion and muscle protein synthesis in older vs younger adults • Veronese et al. — Magnesium supplementation and physical performance in older women • USDA nutrition data for peanut butter FOOD INQUEST investigates what everyday foods actually do inside the body — separating biological mechanisms, published research, limitations, and practical reality from the headline. This content is for educational purposes only and is not medical advice. Speak with a qualified healthcare professional before making significant dietary changes, especially if you have kidney disease, food allergies, or another medical condition. #peanutbutter #healthyaging #nutritionscience