Why should I care about promoting strong bones?
Many people have compared the skeleton to a savings
 bank. During youth
                    and young adulthood you can deposit calcium into 
your bone bank.
                    Between the ages of 9 and 18 your bone bank can 
build at it's fastest
                    rate. For optimal bone building you need enough 
calcium and vitamin
                    D, physical activity, hormonal balance, and healthy 
lifestyle choices
                    like the avoidance of smoking. Peak bone mass, the 
maximum bone density
                    an individual can attain, is reached between the 
ages of 16 and 25.  It is important to reach your peak bone mass so that
 when
                    you are older and your body needs to take calcium 
from your skeleton,
                    you will have a lower risk for osteoporosis. 
Osteoporosis
                    is a bone thinning disease that can weaken the bones
 and increase the
                    risk for fractures (broken bones).
What causes of osteoporosis later in life?
There are many potential causes of osteoporosis that are important
                    to be aware of in your teen years. Genetics or a strong family history
                    of osteoporosis is a primary cause of osteoporosis later in life. Your
                    genetics can lead to either lower peak bone mass and or greater rates
                    of bone loss later in life. It is important to try to build your strongest
                    skeleton as a teen or young adult, regardless of whether you are at
                    a genetic risk for developing osteoporosis later in life. Lifestyle
                      factors that can contribute to osteoporosis later in your life
                    include eating a poor diet, especially if it is low in calcium and
                    vitamin D, getting too little physical activity, smoking or using tobacco
                    products, and drinking excessive alcoholic beverages. Excessive dieting
                    and infrequent menstruation from any cause may also contribute to osteoporosis. There
                    are a number of other secondary
                      causes of osteoporosis including certain diseases, medical conditions,
                    and/or medications that interfere with reaching peak bone mass. 
Exercise
Regular exercise or physical activity is absolutely necessary for building
                    strong bones. It is recommended that teens get 60 minutes of physical
                    activity most days. It is not completely understood how exercise and
                    activity improve peak bone mass, however, the findings from most research has
                    been the following:
- Exercise places physical stress on the body. Bones, like muscles, respond to stress by becoming bigger and stronger, and like muscles, bones weaken if not used.
- Exercise increases blood flow to the bones, bringing in vital bone-building nutrients.
- Exercise creates small electrical potentials (differences) in bone tissue that stimulate the growth of new bone.
- Exercise affects various components of the body's hormonal control of bone remodeling, shifting the balance toward new bone formation (more osteoblasts)
Eat a Nutrient Rich Diet with the Recommended Calcium and Vitamin D
It is important to eat a nutrient rich diet with the recommended calcium. 99% of the
                    calcium in your body is stored in your bones and teeth. The remaining
                    small amount of calcium that is found in blood and tissue plays
                    a critical role in supporting your body's vital functions: such as
                    controlling your blood pressure and maintaining your heartbeat. If
                    you don't eat the recommended amount of calcium, your body takes the calcium it needs
                    to support your body's vital functions from your bones.
                    During the teen years, if you don't get the calcium you need in your diet,
                    your body will take calcium from your bones. 
 
Calcium-rich foods include dairy products (milk, yogurt and cheese), calcium-rich non-dairy foods (certain green leafy vegetables, almonds, soy nuts) and calcium-fortified foods (especially cereals and citrus juices). Beverage choices can make a big difference in your calcium intake. If you drink lots of carbonated beverages, you will tend to drink less milk and calcium-fortified juice and be more likely to have a low calcium intake. It is also a good idea to keep your intake of caffeinated beverages low, too. Caffeine slightly reduces calcium absorption but more importantly high amounts of caffeine-containing beverages may be problematic if they replace beverages that contain calcium in your diet. So, think about what you drink and choose beverages that contain calcium as your first choice.
You can get the recommended amount of calcium in your diet, even if you are lactose intolerant, allergic to milk or following a strict vegetarian diet. If you have lactose intolerance, you can get the amount of calcium you need by taking lactase enzyme replacement along with dairy products or by choosing dairy products with lactase enzyme added. If you are allergic to milk or are following a strict vegetarian diet, you can get the recommended calcium by choosing non-dairy beverages with calcium added (such as fortified rice milk, fortified soymilk, fortified juice, as well as calcium rich non-dairy foods). Be sure to shake these products before serving to prevent the calcium from settling at the bottom of the container.
It is also important that you get the recommended amount of vitamin D. Vitamin D helps
                    your body use calcium so your skeleton can become as strong as
                    possible.  To reach your peak mass, you need to get 600
                    IU of vitamin
                      D in your diet each day. There are foods that are natural sources
                        of vitamin D and foods that are fortified 
with vitamin D. Beverages
                    fortified with Vitamin D include all varieties of 
milk., some almond, rice, coconut and soy beverages and even some 
yogurts. It
                    is important to read
                      food labels for vitamin D content per serving.  
Many teenagers need vitamin D supplementation to reach the amount of 
vitamin D recommended. Most multivitamins include 400 IU of vitamin D 
but it is important to always read the label to find out how much 
vitamin D a vitamin contains.  Vitamin D is also available as a separate
 supplement. Speak to your healthcare provider to find out if a you need
 a multivitamin or a vitamin D supplement. 
Teens need to eat the right amount of calories to have a healthy body weight and in order for girls to maintain normal menstrual function. It is also important to consume the right amount of protein, carbohydrate, fat, vitamins and minerals to fuel an active body. A recent study in teens showed that higher consumption of fruits and vegetables was related to better bones.
Teens need to eat the right amount of calories to have a healthy body weight and in order for girls to maintain normal menstrual function. It is also important to consume the right amount of protein, carbohydrate, fat, vitamins and minerals to fuel an active body. A recent study in teens showed that higher consumption of fruits and vegetables was related to better bones.
Avoid Alcohol:
There are many reasons to avoid underage drinking 
of alcoholic beverages. Among the many dangers of drinking alcohol, it 
is known to be bad for your bones. Alcohol can
                    affect bone health because it interferes with the bone building cells
                    known as osteoblasts. In fact, it may decrease the number of osteoblast
                    cells and interfere with their ability to form bone. This will lead
                    to a lower peak bone mass, and potential bone loss. 
Avoid smoking:
                  Tobacco products
                    are bad for your overall health, and are linked to the development
                    of heart attacks, strokes, many cancers, and lung diseases. Smoking
                    is also very bad for your bones! If you are a smoker and decide to
                    continue to smoke, you are taking the chance of developing all of these
                    diseases including osteoporosis and may be increasing your risk for
                    fracture. Smoking directly affects the bone building cells and acts
                    to decrease bone formation. This can be particularly bad for bones
                    during youth and young adulthood when smoking can result in reaching
                    a lower peak bone mass than expected. According to studies, smokers
                    may also have lower bone mass because they tend to lead a more sedentary
                    lifestyle than nonsmokers.
Best Teen Diets recommends healthy well balanced eating that includes fruits, vegetables, whole grains, protein and low-fat or fat-free dairy. We offer nutrition information for teens, parents and educators that emphasizes the importance of healthy eating for teens. For more information visit www.bestteendiets.org
 
