YourA new study has found that while many long-term vegans consume enough total protein daily, a significant number still fall short of essential amino acids, raising concerns about protein quality in plant-based diets.Conducted by a team of nutritionists from Massey University in New Zealand, the research analysed the diets of 193 vegans using four-day food diaries. The team used data from the U.S. Department of Agriculture and the New Zealand FoodFiles database to estimate amino acid intake from various plant-based foods. Their findings, published in the journal PLOS One, shed light on the challenges vegans face in achieving complete protein nutrition.According to the study, around 75% of participants met their total daily protein needs. However, only about half reached the required intake for two crucial amino acids—lysine and leucine. These amino acids are classified as "indispensable" because the human body cannot produce them on its own and must obtain them through diet.“Meeting adequate total daily protein intake in a vegan diet does not always guarantee a high protein quality diet,” the researchers warned. “Simply considering total protein intake without evaluating protein quality may lead to an overestimation of nutritional adequacy among vegans.”Lead researchers Bi Xue and Patricia Soh emphasized the importance of including a diverse range of plant foods to meet the full spectrum of amino acid needs. While the body can synthesize many amino acids, nine must be sourced directly from food—making dietary balance crucial, especially in vegan diets.The study pointed to legumes, nuts, seeds, and soy products as valuable sources for boosting lysine and leucine intake. These plant-based options can help vegans meet both their total protein requirements and maintain the right amino acid profile necessary for overall health.“Achieving high protein quality on a vegan diet requires more than just consuming enough protein,” the team noted. “It also depends on the right balance and variety of plant foods to supply all the amino acids in the quantities our body needs.”The researchers concluded by calling for further studies to explore effective strategies for improving amino acid intake in vegan populations. As more people adopt plant-based lifestyles, understanding how to maintain both protein quantity and quality is becoming increasingly important for public health.Do you want a headline suggestion or social media blurb for this article?