Did you know that your bones are constantly remodeling? Bones are constantly undergoing the processes of bone resorption by osteoclasts (cells that break down previously deposited bone) and bone formation by osteoblasts (cells that build bone). They are far from the static skeleton decoration for Halloween. In a healthy body, bone formation outweighs bone resorption as young adults, reaching peak bone mass around age 30. After this, bones can be more subject to break down, resulting in osteoporosis and/or bone fractures at advanced ages. Stress fractures are a common injury in runners of all ages, when load stress overcomes bone formation. As we can see, the proper balance between building and breakdown is key to long term bone health.
Fortunately for us, since bones are dynamic, there is much we can do in the way of diet and lifestyle to keep our bones strong, dense, and resilient through running and aging. If you are recovering from a bone injury, struggling with serial stress fractures, running into the ages, or desire to keep your bone density up for the long run, this blog post will provide you with important nutrients found in foods with your best bones in mind! For meal inspiration, check out my Roman Tahini Kale Salad Recipe.
When we think of strong bones, calcium is commonly the mineral in the spotlight. Calcium alone though cannot create strong bones and banking on calcium supplements does not work in preventing osteoporosis or fractures.
Calcium is the most abundant mineral in bones and works with a symphony of other nutrients, all necessary to proper bone remodeling. Vitamin D3 from both our diet and sunlight on the skin stimulates calcium absorption from food in the intestines. Vitamin D also manufactures osteocalcin, a protein in bone. Magnesium is needed for the absorption and metabolism of Vitamin D and also the absorption of calcium from blood to the bone. Boron is required to synthesize Vitamin D into its most potent form and decreases calcium lost through urine. Vitamin K activates osteocalcin, the mineralization protein which anchors calcium to the bone matrix. Phosphorus is also necessary for bone mineralization. Healthy fats are essential for these processes since Vitamin D and K are fat-soluble vitamins. Zinc is required for proper osteoblast and osteoclast formation and function. Vitamin C stimulates the formation of collagen, the foundational matrix of bone. Adequate levels of protein of course are necessary to bone building and structure.
Seeing how all these nutrients work in harmony with the necessity of each other, eating a real food diet is the sure-fire way to get all of these vitamins, minerals, and macronutrients into your body in the ideal balance. Eating the rainbow of diversity is an excellent way to get the wide array of nutrients required. As runners, we know that our bodies require basically more of everything, since every day we physically stress ourselves in order to build back stronger. Running is very taxing on our bones as a weight bearing exercise, though it is also one of the best things we can do for our bones since it requires them to build back stronger as well. To do so, the body must have these crucial building blocks, and enough of them, for repair while also protecting against the natural cycles of bone degradation that come with age.
Below is a chart with key bone building nutrients and some powerful foods to go along with them. Print this out and try eating foods from each category every day!
Bone Building Nutrient Power Foods Note
Calcium | Sardines, tofu, dark leafy greens, tahini, almonds, organic dairy | The bones in sardines make up most of their calcium, keep them in! |
Vitamin D3 | Sunshine! Sardines, mushrooms, egg yolk, wild caught salmon | Mostly in animal fats;Mushrooms synthesize Vitamin D in their caps from sunlight |
Vitamin K1 & K2 | K1: dark leafy greensK2: egg yolks, grass fed dairy | Think GREEN! Kale, collard greens, swiss chard, brussels, spinach, cabbage, broccoli, avocado |
Magnesium | Pumpkin seeds, all nuts and seeds, dark leafy greens | Fruits and vegetables get their minerals from the soil: therefore buy organic and/or small farm local |
Vitamin C | Fruits, Brussel sprouts, peppers, tomatoes | Fruits are always a great snack throughout the day. Fresh is best! |
Protein | Fish, eggs, legumes, nuts and seeds, soy foods, whole grains, meat | Eat a quality protein source at every meal |
Zinc | Pumpkin seeds, oysters, shrimp, beans, lentils | Toast on a cast iron skillet for next level flavor |
Others: boron, phosphorus, sulfur… | Raisins, apples, beans, garlic, nuts and seeds | Make raw garlic a staple of your salad dressing! |