When you eat foods that are low- or no-fat, other ingredients are added in so that the food tastes like its full-fat counterpart. Those extra ingredients don’t add in the nutrients that have been stripped away, however, so you end up craving more because, despite the fact that you just ate, your body is still lacking in the vital nutrients it needs. You end up eating more calories than you would have if you’d just eaten the full-fat product.
Then, there’s biochemistry. In women, ghrelin — the “I’m hungry” hormone — spikes after a workout, while leptin — which tells the brain ‘I’m full!’ — plummets, according to a 2009 study in the American Journal of Physiology — Regulatory, Integral and Comparable Physiology. Not so in men. So post-workout, women tend to eat more, which puts them at risk to gain weight. Men don’t experience this same hormonal fluctuation.
The researchers hypothesize that participants who abstained from animal products dropped significantly more pounds since plant-based foods include loads of filling fiber and slow-to-digest complex carbs. Though more research is needed to confirm these results, the study authors write, "Vegetarian diets appeared to have significant benefits on weight reduction compared to non-vegetarian diets."
Obviously, it’s still possible to lose weight on any diet – just eat fewer calories than you burn, right? The problem with this simplistic advice is that it ignores the elephant in the room: Hunger. Most people don’t like to “just eat less”, i.e. being hungry forever. That’s dieting for masochists. Sooner or later, a normal person will give up and eat, hence the prevalence of “yo-yo dieting”.
Some people feel better supplementing the already active T3 (sometimes prepared from pig thyroid glands), as it can give a stronger effect than the T4 hormone, but its effect is often harder to control. Swedish healthcare rarely prescribes or offers such T3 treatment, as it often lacks advantages and may pose a risk when doses are high for an extended period of time.
No weight loss program rivals Weight Watchers' (Est. $20 and up per month) record of scientifically proven efficacy and enthusiastic expert and dieter endorsements. Its combination of in-person and/or online support and motivation, flexible points-based meal planning, and physical activity are hard to beat. There are no off-limit foods, and the program can be customized for any dietary need, making it a good choice for vegetarians, vegans and anyone who has a specific food allergy or intolerance. It emphasizes fresh fruits and vegetables by making them "free" foods -- in other words, foods that don't have to be portioned or tracked.
Trim Portions. If you did nothing else but reduce your portions by 10%-20%, you would lose weight. Most of the portions served both in restaurants and at home are bigger than you need. Pull out the measuring cups to get a handle on your usual portion sizes, and work on paring them down. Get instant portion control by using small bowls, plates, and cups, says Brian Wansink, PhD, author of Mindless Eating. You won't feel deprived because the food will look plentiful on dainty dishware.