Food and Thought Newsletter - April 2025

April 14, 2025

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Protein and Mental Health
You may be aware that protein is an essential nutrient for building strong muscles and organs, as well as for cell repair. But did you know that it also appears to have an impact on mood and memory as well? Several new studies are pointing to the importance of the dietary intake of protein on cognitive health and depressive symptoms. So, how much is enough? Can you get too much protein? And what are the best sources of protein for optimal brain functioning? Read on to find out!

Animal and Plant-based Sources of Protein
Animal proteins are complete proteins. That means they contain all the essential amino acids that you need in your diet. Plant proteins are often, but not always, incomplete sources of protein. There are benefits and concerns with both types of protein, however, diets that rely mostly on plants for protein have been linked to a lower risk of stroke, heart disease, and early death.1
What you actually need from protein are the amino acids. You need 20 different ones. Your body makes some of them, but you must get nine from your diet. These are called essential amino acids. Complete proteins provide all nine essential amino acids.
Most plant sources of protein are incomplete. However, you can get all the essential amino acids you need from plant foods, as long as you eat a variety of them.

How Much Protein Do We Really Need? 
There is no one-size fits all number for how much protein we should eat in a day, but for most people, a good rule of thumb is to get 25% of your calories from protein. Talk to your doctor about your optimal caloric and protein intake numbers.
* While it is important to eat a diet rich in protein, too much can lead to kidney stones and other health concerns, especially if eating a lot of animal-based protein. Talk to your doctor for more information about the effects of eating too much protein.

Animal Proteins:
Animal-based protein helps reduce the risk of type 2 diabetes, heart disease and multiple types of cancer including colorectal, pancreatic, stomach and prostate. However, eating too much processed and unprocessed red meat has been linked to shorter life spans. Sources of animal-based protein include:
• Dairy products, Eggs
• Poultry
• Beef
• Pork

Plant-Based Proteins:
Plant-based protein provides plenty of nutrients, fiber, and antioxidants that can improve your overall health. Plant-based protein protects against heart disease, stroke, cancer, type 2 diabetes, depression and cognitive decline. Sources of plant-based protein include:
• Nuts and Seeds
• Whole grains such as quinoa or buckwheat
• Whole sources of soy such as tofu, edamame, and tempeh .
• Legumes such as beans, peas, and lentils
• Vegetables

Sources for this month’s newsletter: have been taken from: 1https://cambridge.org/core/journals/british-journal-of-nutrition/article/association-between-deitary-protein-intake-and-therisk-ofdepressive-symptoms-in-adults/784617BD;https://www.health.harvard.edu/mind-and-mood/protein-intake-associated-with-less-cognitive-decline;hhttps://health.clevelandclinic.org/how-much-protein-you-need;https://www.webmd.com/diet/difference-

The Food and Thought Program works to promote awareness and provide short term counselling around the important link between nutrition and emotional health. For more information or for a referral to the program, please contact the Food and Thought Program

This work is supported by the Beverly and Addison Gilbert Hospital Community Benefits Community Grant Program and the Essex County Community Foundation Behavioral Health Partnership Grant.

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