Girls' bodies undergo gradual changes during puberty, analogous to but distinct from those experienced by boys. Puberty is the process of physical changes by which a child's body matures into an adult body capable of sexual reproduction to enable fertilisation. It is initiated by hormonal signals from the brain to the gonads-either the ovaries or the testes. In response to the signals, the gonads produce hormones that stimulate libido and the growth, function, and transformation of the brain, bones, muscle, blood, skin, hair, breasts, and sexual organs. Physical growth—height and weight—accelerates in the first half of puberty and is completed when the child has developed an adult body. Until the maturation of their reproductive capabilities, the pre-pubertal, physical differences between boys and girls are the genitalia, the penis and the vagina. Puberty is a process that usually takes place between the ages 10–16, but these ages differ from girl to girl. The major landmark of girls' puberty is menarche, the onset of menstruation, which occurs on average between ages 12–13.
Sweetened with a touch of stevia, this is a new breed of protein shake, made primarily of hydrating coconut water. Grass-fed milk protein supplies more protein than three eggs–for a fraction of the morning prep time. If you need your fuel with caffeine-derived focus, they offer a coffee flavor that uses plenty of joe–in fact, it’s the second ingredient.
They also found carbohydrate-selective diets to be better than categorically low-carbohydrate diets, in that incorporating whole grains is associated with lower risks for cancers and better control of body weight. Attention to glycemic load and index is "sensible at the least." Eating foods that have high glycemic loads (which Katz says is much more relevant to health outcomes than glycemic index—in that some quality foods like carrots have very high indices, which could be misleading) is associated with greater risk of heart disease.
That doesn’t mean you should take up a coffee habit if you don’t already have one. “It’s a mild stimulant and too much can cause jitters and heart palpitations,” Cording points out. “You want to hit that sweet spot but don’t want to overdo it.” She recommends having less than 400 milligrams of caffeine a day (which translates to about four eight-ounce cups of coffee) to see results.
Not a jock? Find other ways to fit activity into your day: walk to school, jog up and down the stairs a couple of times before your morning shower, turn off the tube and help your parents in the garden, or take a stroll past your crush's house — anything that gets you moving. Your goal should be to work up to 60 minutes of exercise every day. But everyone has to begin somewhere. It's fine to start out by simply taking a few turns around the block after school and building up your levels of fitness gradually.
Fill a big teacup with soothing peppermint tea, and sniff yourself skinny! While certain scents can trigger hunger (a trick Cinnabon figured out long ago), others can actually suppress your appetite. One study published in the Journal of Neurological and Orthopaedic Medicine found that people who sniffed peppermint every two hours lost an average of 5 pounds a month. (Although tea is relatively low in caffeine—about 25% of what a cup of coffee delivers—decaffeinated varieties are great to have on hand for a soothing bedtime treat.) Consider also adding a few drops of peppermint oil to your pillow or burning a minty candle to fill the room with slimming smells.
Thanks to its flexibility, easy-to-understand system, and group support, Weight Watchers came out way (weigh?) ahead, winning "best weight loss," "best fast weight loss," and "best commercial diet" in the U.S. News & World Report rankings. (Oprah's endorsement probably didn't hurt either!) They recently revamped their signature plan to include "free" foods like chicken breasts and fresh produce so you'll never feel hungry even while dropping pounds. In addition, their app makes tracking your food a piece of cake—which you're totally allowed to have on the program, by the way. (Even better news: Research supports the fact that Weight Watchers is one of the best weight-loss diets.)