There are lingering weight tips and myths that seem to defy experts’ attempts at explaining them away. The American Dietetic Association’s Food & Nutrition Conference & Expo that took place in Chicago last month made yet another attempt to de-bunk some of these popular myths.

Here are ten of the most enduring and most mistaken diet and nutrition myths out there. The ones that get repeated all the time. Experts at the ADA conference busted these myths wide open giving you the scoop, once and for all, on these often repeated misconceptions.

Myth 1: Eating at night is bad for you.

According to Christine Rosenbloom, PhD, RD, CSSD of Georgia State University this is completely false. This misconception very likely came from an assumption made based on the positive effect on BMI when you eat breakfast. But that doesn’t mean eating later on during the day is bad. In the end, the number of calories you take in per day, whether first thing in the morning or late at night, is all that counts.

Myth 2: You should avoid foods with a high glycemic index.

Sure being aware of the glycemic index is a good thing… knowledge always is. The trouble comes when you use this index as the measure of everything you eat. It shouldn’t be your sole strategy for controlling blood sugar or trying to lose those extra pounds. At most, it will help you fine-tune your food choices. Eating a variety of healthy, natural foods is best… looking to one value alone is dangerously short sighted.

Myth 3: High fructose corn syrup causes weight gain.

This diet myth came about in 2003 when experts noticed that obesity was rising along with the increased use of high fructose corn syrup. Attempts were made to link the two together and it took a while to find the answer. The American Medical Association has just concluded that high fructose corn syrup does not contribute to obesity, beyond the calories in the food itself.

Myth 4: Caffeine is bad for you.

According to Rosenbloom, there is some evidence that caffeine, besides giving you a shot of alertness, might also have a positive effect on conditions like gout and Parkinson’s disease. And contrary to popular belief, caffeine doesn’t dehydrate you. What you do want to watch for is the hidden caffeine in products, and the number of high caffeine energy drinks your children may be taking in during the day… kids gulp these down without realizing what’s inside.

Myth 5: The less fat you eat, the better.

Counting fat grams isn’t everything and those with heart disease, diabetes and metabolic syndrome might actually benefit from adding a little healthy fat to their diet. Healthy fat is the monounsaturated kind and should be substituted, whenever possible, for saturated fats. Again casting one component of a diet as the “bad guy” is misleading, moderation in all things is your best bet.

Myth 6: To eat less sodium, avoid salty foods and use sea salt instead.

Gourmet salts like sea salt aren’t any healthier than regular, unglamorous table salt. You use less sea salt only because this type of salt is coarser, so fewer grains fit into a standard teaspoon. If you really want to impact your sodium intake, check the labels of processed foods you choose as these tend to have high sodium contents that are a good idea to avoid.

Myth 7: Drinking more water each day will help you lose weight.

There is no evidence that water helps you shed pounds, though foods with lots of water, like soup, do fill you up. Carrying around a huge water bottle and sipping regularly may quench your thirst, but it won’t affect your appetite or have you burning any more calories. According to Rosenbloom, “Our thirst mechanism and our hunger mechanism are two different things.”

Myth 8: Whole grains are always better than refined grains.

While whole grains are a great tasting, healthy option, you don’t have to ditch refined grains altogether. In fact, the U.S. Department of Agriculture’s “My Pyramid” guidelines suggest getting just half your grains from whole grain sources. Rather than putting a ban on breads, look for enriched grains – refined grains with some nutrients (like folic acid and others) can have health benefits too. A well balanced diet includes both sources of grains.

Myth 9: Sugar causes behavior problems in kids.

This is one myth where you need to look hard at your own expectations. What do you expect your child (or any child for that matter) to do after eating candy and then there’s the “sugar high” everyone talks about. Surprisingly, studies show that when parents think kids have been given sugar, they rate the child’s behavior as more hyper, though in fact no sugar had been eaten. Rather than blaming sugar, think about expectation and the excitement of the event at hand as a source for your child’s excitable behavior.

Myth 10: Protein is the key nutrient for athletes.

Of course athletes do need more protein than the rest of us, but they don’t need nearly as much as they’ve been led to believe. Supplements probably aren’t necessary as athletes, body and health conscious, as they tend to be, are usually getting plenty of protein from their food. If you’re weight training, eating protein after a workout, about 8 grams (what you’ll find in a small carton of low fat chocolate milk), will help your muscle tissue rebuild. Multiple scoops of whey powder as part of a special drink is probably going overboard.

These weight tips and myths are not the only ones that have little grounding in reasonable research but this article should outline some of the major myths circulating.

There are many different types of athletes, sports programs, and exercise regimens. And for each different person and type of program your body may have unique nutritional requirements. For example, a marathon runner will have different energy and nutritional requirements than a sprinter. Also, a person who participates in strength training will have different nutritional requirement than someone who focuses on cardiovascular exercise.

If you are interested in strength training or have already participated in a strength training program, it is important that you understand the basic nutrition that your body requires. When strength training, a higher amount of calories is needed to keep your body energized and enable it to build muscle tissue.

Carbohydrates are the main source of energy your body will use for energy. Carbohydrates are stored in the body as glycogen and can be easily access for the energy your body requires. When strength training, it is recommended that you consume 500 to 600 grams of carbohydrates per day to give your body the energy it needs. Protein is also an essential nutrient that your body requires to be healthy while strength training. Protein is what your body uses to build muscle and repair damaged tissue. But don’t overestimate the amount of protein you need in your diet. As a general rule, you should consume about 90 to 115 grams of protein per day to give your body what it needs.

And while much of your focus will be on the foods that you eat, you also need to monitor the hydration and water intake of your body. Water is essential to help your body transport nutrients and aids in digestion. And though your body might not sweat as much during strength training, it is essential that you keep your body hydrated. By doing this, you should have a successful experience.