Fruits are a good choice for any healthy diet. There really is no better selection for a healthy snack than a hearty serving of fruit. Fruits are high in vitamins and minerals such as Vitamin C, Beta Carotene, B Vitamins and are also an excellent source of fiber.

When you have a sweet tooth, instead of reaching for some cookies or any other junk food, have some fruit instead. Because of the fiber content in most fruit, you will feel full longer than if you had eaten the empty, nutrition less calories in junk food. The best choice is to eat whole, fresh fruit. Canned fruits are often soaked in high fructose corn syrup, greatly increasing the sugar content of the fruit. The natural sugars contained in fruits are more than enough for most people's cravings for something sweet.

Protein

Proteins are made up of amino acids which are the structural units of the protein molecule. There are approximately 20 amino acids. Eight of them are considered "essential" because the human body cannot make them on its own - which is the definition of an essential nutrient. Link a few amino acids together and you get a peptide. Link a bunch of peptides together and you get a protein. The shape of the individual amino acids (and resulting proteins) is unique and highly specific, so I won't go into great detail about it here. Suffice it to say, proteins are an essential part of virtually every function in our body from the muscles, to certain hormones, to our immune system(s) and a whole lot more. In particular, the amino acids known as the "branched chain" amino acids (leucine, isoleucine, and valine) and the amino acid L-glutamine are of particular interest to active people as they are anti-catabolic (muscle sparing) and immune enhancing, to name only a few functions and benefits of these particular amino acids.

Though the RDA for protein is generally sufficient for couch potatoes (with some debate) the majority of athletes and/or highly active people will benefit from higher intakes of high quality proteins. Proteins with the highest biological value (BV) are the proteins that should constitute the majority of the active person's diet, as they are superior for maintaining positive nitrogen balance, reducing recuperation time from workouts, improving immune function, etc.

Whey protein concentrate (WPC) and isolates (WPI) have the highest BV of any protein, is almost 50% branched chain amino acids, and is high in L-glutamine, which is why I recommend several servings a day of WPC/WPI to all the athletes/martial artists/police I work with. There are several brands of WPC/WPI on the market.

Other high quality proteins such as skinless chicken, fish, eggs, soy, and lean red meats, have relatively high BV values and are good proteins. Another point that is important to know is that the higher quality the protein, the less the person has to eat and this allows the person to keep total calories lower by sticking to these high BV proteins.

For a person who is active in the martial arts, has a busy job, and probably does some weight lifting and/or aerobics, an intake of .7 - .8 grams of protein per pound of lean body weight is what I have generally recommended. For high level bodybuilders and competitive distance athletes, the protein intake will be higher, approximately 1g of protein per lb of bodyweight being the most common. In certain situations, amino acid supplementation is useful, but most people will have no problem getting what they need by eating plenty of high quality protein foods. Low grade, high fat, preservative loaded, protein foods such as luncheon meats, hot dogs, etc., should be avoided for obvious reasons.

Carbohydrates

Carbohydrates are made primarily of carbon, hydrogen, and oxygen atoms that cycle into a ring. They can be "simple" or "complex" depending on the number of rings that are hooked together and the way the carbohydrate effects blood sugar (1). Though the rings can be slightly different in shape, their common theme is the ring structure. Similar to amino acids that make up proteins, when you link the simple units (the sugars) together you get carbohydrates with different properties. As most people know, carbohydrates are a primary source of energy for the body.

The best type of carbohydrates to eat are those that are high in fiber, vitamins, and minerals. Though foods such as pasta, breads, and white rice are considered "complex" they are highly processed foods, totally inadequate in fiber, vitamins, and minerals and should not make up a high percentage of a persons carbohydrate intake. Though these foods are often fortified with certain vitamins, in my opinion this does not truly replace what is lost during processing, not to mention the many nutrients that are not replaced. Americans are notoriously low eaters of fiber, and heavily processed foods mentioned above do nothing to correct this deficit. High fiber carbohydrate foods such as brown rice, beans, lentils, oatmeal, sweet potatoes, and many others, are the preferred carbohydrate foods for health, performance, steady blood sugar levels, and reduced bodyfat levels.

Though the high carbohydrate/low fat diet is all the rage these days, it has not been in my experience the optimal diet for the many athletes, martial artists, and "normal" people I have worked with (see fats below). Data continues to support the fact that high carb/low fat diets are not optimal for either health or weight loss. Eating too much of anything, including carbohydrates, will make one fat (too bad the makers of non-fat foods fail to tell you this) and cause a host of other ills I don't have the space here to cover. There are many researchers, books, and studies using both animals and humans that seriously questions the high carbohydrate/low fat diet as the optimal diet for health and performance.

Two grams per pound of lean bodyweight of carbohydrates is more than sufficient to fuel the energy needs of most athletes if other aspects of their diet is adequate (i.e. correct use and amounts of certain fats and proteins). And, as mentioned previously, the source of those carbohydrates is of paramount importance.

Fats

The very word sends a shiver down the back of the leanest person. There is not a more misunderstood nutrient in all of nutrition than fats. Many people know there are big differences in how various carbohydrates effect the body and some people even know that different proteins have different properties, but "a fat is a fat, no?" is what the majority of people would say if you asked them about this much maligned nutrient. Fats have just as many biochemical differences in the human body as do carbohydrates and proteins, and thus have just as many different effects on the body that range from very good to very bad. It really depends on the type and amount of fat(s) we eat(2). Americans tend to get their dietary fats from saturated fats, rancid fats, and highly processed fats (which contain by products such as trans fatty acids), thus giving fats a bad name.

As mentioned earlier, an essential nutrient is anything the human body cannot manufacture on its own and must be obtained from the diet, or the person will become sick and/or perish if the nutritional deficit is not corrected. We know there are a multitude of vitamins and minerals, eight amino acids, and two types of fats that are considered essential nutrients for life itself to continue. (You should be aware that there is no such thing as an essential carbohydrate, but that's a whole other story.)

The two fats that are known to be essential to health are Linoleic acid (LA) which is an Omega-6 fatty acid and Alpha-linolenic acid (LNA) which is an Omega-3 fatty acid. Both of these fats can be found in various foods that have not been heavily processed. These two fats are highly sensitive and reactive to heat, light, and oxygen (i.e. they go bad quickly), and are totally ruined or lost during the processing of our foods. The reason poly-unsaturated vegetable oils that line the shelves of most super markets can sit there for years on end is because they have been heated, deodorized, and generally processed to the point that they are the nutritional equivalent of white bread and table sugar. I recommend people avoid those oils.

Because of all the fat bashing by the popular media and health professionals who should know better, most people have come away thinking that all fat is bad and serves no other purpose than to make our hips and stomach wider while ruining our health. Nothing could be further from the truth. The membrane that surrounds every single cell in your body, the sheath around nerves, various hormones, prostaglandins, and countless other parts of the body (especially the brain) depend on the dietary intake of the right fats. The importance of the essential fatty acids for health and performance cannot be understated.

It is true that certain fats, such as, saturated fats, rancid fats, and trans fatty acids (found in margarine, Crisco, and other products) , can cause numerous health problems from heart disease to cancer and insulin resistance, to name only a few ills of a diet high in the wrong types of fat. However, the essential fatty acids (especially the Omega-3 fatty acids) are anti-lipolytic (stop fat storage), anti-catabolic (stop the break down of muscle tissue), increase metabolic rate and beta oxidation (burn calories/increase fat burning), improve insulin sensitivity, reduce the chances of heart diseases, and a whole lot more (3).

Calories in Common Fruits
Apple(medium)	80
Apricots(3 medium)	50
Blueberries (1 cup)	80
Cantaloupe (half - average size)	55
Cherries (1 cup)	90
Dates (4oz)	214
Grapes (1 cup)	90
Kiwi(medium)	45
Mango (4oz)	75
Orange (medium)	50
Plum (medium)	20
Tangerine (medium)	30

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