We're constantly being fed so many different weight loss 'rules' - what to eat, when to eat, how to speed up your metabolism - that it can be impossible to separate the fact from fiction. Much of this so-called advice comes from nutrition 'experts' on social media; those with an interest in health and wellness, but who lack the scientific knowledge to back it up.

Enter model and AfN-accredited nutritionist Sarah Ann Macklin, who was inspired to get a degree in Human Nutrition after experiencing the issues around diet that can arise from working in the fashion industry. Her philosophy involves applying evidence-based practice to provide an accessible approach to nutrition.

"'Fat makes you fat' is probably one of the biggest myths out there," Macklin explains. "It actually leads to weight loss. You crave less, you snack less, you feel fuller for longer, and you're just more satisfied with what you're eating."

Watch the video above for more popular diet misconceptions disproven by the nutritionist (including that, actually, frozen food can be better than fresh and that quite honestly charcoal is a waste of time).

Video by Harry George Hall for Rise Media, styling by Charlotte Davey. Filmed at Dukes London.

11 healthy foods that actually make you more hungry
<p>Think that 100-percent whole-grain English muffin with peanut butter is going to satisfy you 'til lunch? Not a chance. "'Whole-grain goodness' is anything but," says Perlmutter. "Bread, even the whole-grain kind, is extremely high on the glycemic index and will elevate your blood sugar even more than a Snickers bar."  </p><p>It sounds crazy, but it's true: Whether it's a candy bar or whole-grain foods, bombarding your body with too many carbs will raise your insulin levels, which  in turn can lead to weight gain and more serious health conditions like insulin resistance and eventually diabetes. "Insulin is a hormone produced by the pancreas that ferries glucose (or sugar) into the cells, where it can be used as fuel," explains Perlmutter. In a healthy body, when all the glucose and nutrients from food are absorbed, insulin levels drop and remain at a normal, low level, keeping hunger in check. </p><p>But if you overload on too much glucose, eventually your cells <a href="http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1083868/">become resistant</a> to insulin's signals to retrieve glucose from the blood. This forces your body to store that excess glucose as fat, you gain weight, and your appetite goes unchecked.</p>