Putting protein into perspective

During digestion, protein in food is broken down into the 20 amino acids that are the basic building blocks our bodies use to create its own protein. Our bodies need protein to maintain our cells, tissues and organs. A lack of protein in our diets can result in slow growth, reduced muscle mass, lower immunity, and weaken the heart and respiratory system. Protein gives us the energy to get up and go –and keep going. Keep in mind that it is vital to eat healthy protein that is free of hormones and antibiotics. Also, the majority of people in the U.S. eat more protein than is necessary. So focus more on getting higher quality versus more quantity. Each person is individual and may need different amounts of protein depending on their body and activity level.

• A complete protein source is one that provides all of the essential amino acids. Examples are animal-based foods such as meat, poultry, fish, milk, eggs, and cheese.
• An incomplete protein source is one that is low in one or more of the essential amino acids.
• Complementary proteins are two or more incomplete protein sources that together provide adequate amounts of all the essential amino acids. For example, rice and dry beans. Similarly, dry beans each are incomplete proteins, but together, these two foods can provide adequate amounts of all the essential amino acids your body needs.
• Do complementary proteins need to be eaten in the same meal? Research shows that your body can combine complementary proteins that are eaten within the same day.

Nuts, Seeds, Beans, and Tofu: alternative sources for healthy proteins

Beans, nuts, nut butters, peas, and soy products are good sources of protein, fiber, vitamins, and minerals. Many of the foods in this group provide iron, which is better absorbed when a source of vitamin C is consumed with the meal

Choose: Black beans, navy beans, garbanzos, lentils, and other beans. Nuts like almonds, walnuts and pecans. Soy products like tofu, soymilk, tempeh and veggie burgers. All of these are great sources of protein for vegetarians.

Avoid: Salted or sugary nuts; refried beans.

Dairy products and other sources for calcium and vitamin D

Dairy products provide a rich source of calcium, necessary for bone health. Most are fortified with vitamin D, which helps the small intestine absorb calcium. Calcium can also be found in dark green, leafy vegetables, such as kale and collard greens, as well as in dried beans and legumes.

Recommended calcium levels are 1000 mg per day, 1200 mg if you are over 50 years old. Take a vitamin D and calcium supplement if you don’t get enough of these nutrients from your diet.

Choose non-fat or low-fat dairy products that do not contain rBST (bovine growth hormone). If you're lactose-intolerant, choose lactose-free and lower-lactose products, such as lactose free milk, hard cheeses and yogurt.

Avoid full-fat dairy products or products from cows treated with rBST.

Fats: avoid the bad fats and enjoy the good fats

Fats are another vital part to a healthy diet. Good fats are needed to nourish your brain, heart, nerves, hormones and all your cells, as well as your hair, skin, and nails. Fat also satisfies us and makes us feel full. It’s the type of fat that matters in addition to how much you consume.

• Saturated fats, primarily found in animal sources including red meat and whole milk dairy products, raise the low-density lipoprotein (LDL or "bad") cholesterol that increases your risk of coronary heart disease (CHD). Substitute lean meats, skinless poultry, and low-fat or nonfat dairy products, fish and nuts. Other saturated fat sources include vegetable oils such as coconut oil, palm oil and foods made with these oils.
• Trans fat raises low-density lipoprotein (LDL or "bad") cholesterol that increases your risk of coronary heart disease (CHD), as well as lowering HDL, or good cholesterol. Trans fats are created by heating liquid vegetable oils in the presence of hydrogen gas, a process called hydrogenation. Primary sources of trans fat are vegetable shortenings, some margarines, crackers, candies, cookies, snack foods, fried foods, baked goods, and other processed foods made with partially hydrogenated vegetable oils.
• Monounsaturated fats - People following traditional Mediterranean diets, which are very high in foods containing monounsaturated fats like olive oil, tend to have lower risk of cardiovascular disease, Primary sources are plant oils like canola oil, peanut oil, and olive oil. Other good sources are avocados; nuts such as almonds, hazelnuts, and pecans; and seeds such as pumpkin and sesame seeds.
• Polyunsaturated fats – These includes the Omega-3 and Omega-6 groups of fatty acids which your body can’t make. Omega-3 fatty acids are found in very few foods – primarily cold water fatty fish and fish oils. Foods rich in certain omega-3 fats called EPA and DHA can reduce cardiovascular disease, improve your mood and help prevent dementia. See below for more on Omega-3. Other sources of polyunsaturated fats are sunflower, corn, soybean, and flaxseed oils, and walnuts. It is important to know that these oils become unhealthy when heated due to the formation of free radicals, which can lead to disease.

How much fat is too much? It depends on your lifestyle, your weight, your age and most importantly the state of your health. Focus on including Monounsaturated fats and Polyunsaturated fats in your diet, decreasing Saturated fats, and avoiding Trans fats as much as possible. The USDA recommends that the average individual:

• Keep total fat intake to 20-35% of calories
• Limit saturated fats to less than 10% of your calories (200 calories for a 2000 calorie diet)
• Limit trans fats to 1% of calories (2 grams per day for a 2000 calorie diet)
• Limit cholesterol to 300 mg per day, less if you have diabetes.