🏋️ Fitness & Wellness Sep 23, 2026 · Liz Shaw MS, RDN, CPT

Protein Deficiency: Symptoms and Signs of Low Protein Intake

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Protein Deficiency: Symptoms and Signs of Low Protein Intake
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Have you ever wondered about the signs of protein deficiency? Although true protein deficiency is rare, your individual protein needs can vary. U.S. MyFitnessPal users with weight-loss goals get an average of 24.7% of their calories from protein. That falls within the acceptable range of 10% to 35% for adults, but percentages alone don’t show whether someone is meeting their needs—total calories, body weight, age, and activity level also matter (2). Protein is a must-have macronutrient that help

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