This finding has far reaching implications for cognitive therapies to fight over-eating, but may also suggest new, easy to implement strategies for memory enhancement.
In the study, rats being trained on memory tasks were administered a substance called oleoylethanolamide (OEA) that normally increases in the gut after the ingestion of dietary fat (not carbohydrate or protein).
To determine the neural pathway involved in this effect, the researchers chemically blocked signaling in the region of the brain that receives neural inputs from the gut (solitary nucleus), which abolished the effect of OEA. These findings may partially explain the emotional component that is often associated with chronic over-eating, something that frequently involves learned habits triggered by emotional situations.
Low-fat diets have proved to be a colossal failure for both health and weight loss, partially because they encourage over-consumption of starchy (usually refined) carbohydrates. Another interesting corollary of this study is that fat (specifically oleic acid, a healthy fat found predominantly in olive oil and nuts) may enhance learning and memory. A healthy diet can prevent or even reverse four out of the six leading causes of death in the US. You can lose weight on any short-term diet, but you will probably gain back more than you ultimately lose. UPDATE: For more information on the health value of oils from fish, please read my answer in the comments section.
Mucha gente piensa que las grasas son el enemigo a batir y que hay que eliminarlas totalmente de la dieta para perder peso. El cuerpo necesita cierta cantidad de grasa en la dieta para poder funcionar correctamente. Al seguir una dieta cero grasas se producen disfunciones que en el mejor de los casos produciran sequedad de piel y falta de vitaminas.
Los vegetales como el aceite de oliva, los frutos secos y el aguacate, junto con las grasas omega-3 como las del salmon, la caballa, la dorada o las sardinas son las mas recomendadas por sus conocidos beneficios para la salud.
En definitiva, las dietas sin nada de grasa no son recomendadas y siempre debemos optar por grasas saludables.
Eres libre de copiar, modificar y distribuir cualquier articulo o escrito de esta obra siempre que pongas un enlace HTML a esta pagina y cites la fuente. Fatty acids are predominately nonpolar molecules consisting of a long chain of carbons with an oxygen and a hydroxyl group at one end. A fatty acid is said to be saturated if each carbon is joined to its neighboring carbons by a single bond. Unsaturated fatty acids are classified based on the position of the first double bond from the end of the chain. While a saturated fatty acid is a straight molecule on the average, the double bond in an unsaturated fatty acid produces a kink in the molecule.
While trans fatty acids are uncommon in natural fatty acids, they form readily when polyunsaturated fatty acids from plants are "partially hydrogenated" chemically. If a fatty acid has more than one double bond in the carbon chain, the fatty acid is termed polyunsaturated. Linoleic acid is the important n-6 fatty acid in the diet, while alpha-linoleic acid is the important n-3 fatty acid. Linoleic acid ultimately can be be converted to arachidonic acid, an important precursor of certain regulatory molecules we will soon discuss. On the other hand, alpha-linoleic acid can be converted in small amounts to two somewhat longer n-3 fatty acids, EPA and DHA, which both play physiological roles.
The n-6 or n-3 polyunsaturated fatty acids often affect the regulatory physiology following their incorporation into phospholipids in plasma membranes. However, n-6 and n-3 polyunsaturated fatty acids in membranes can also directly affect opening and closing of ion channels and thus the electrical excitability of membranes. Finally, these fatty acids can have direct regulatory effects by binding to receptors on certain cells. Triacylglycerols are synthesized from three fatty acids joined together by one glycerol molecule. How can I tell if food is high in saturated fat, and will unsaturated fat help me lose weight?
Can you please tell me how I’ll know if something is not high in saturated fat, and if it’s okay to eat without me gaining weight? First off, all fats (saturated, polyunsaturated, monounsaturated) provide the same 9 calories per gram. Telling what’s high or low in saturated fat at a restaurant entails a little detective work. Check out some of our other articles right here at LIVING HEALTHY for more tips on reducing body fat percentage. Several days later, the rats given OEA performed better on the tasks than rats that were not, demonstrating enhanced learning. Next they selectively blocked neural transmission between this region and another region of the brain that has been shown to be critical for emotional learning (amygdala). It is also critical in feelings of satiety after a meal (decreasing hunger) and has been implicated in controlling body weight.
Moreover, vegetable and fish oils are protective against many chronic diseases that plague Western culture. Since the benefits of OEA were only evident when it was administered at the time of or immediately after training, the next time you study or prepare for a presentation you might want to have some nuts around to snack on.
Evidence indicates that diet is more important than genetics in the vast majority of heart disease, stroke, cancer and type 2 diabetes cases. But they definitely do not eat the processed, refined carbohydrates that flood Western culture. Americans consume more calcium than most countries on earth, yet still sport some of the highest rates of osteoporosis.
Fiber supplements do not offer the same benefits as fiber-filled foods, and do not help with weight loss or protect against disease.
Processed oils and trans fats (not total dietary fat) are associated with heart disease, type 2 diabetes, cancer and obesity. Mono- and polyunsaturated fats protect against heart disease, type 2 diabetes and memory loss. Si embargo, aunque es cierto que las grasas tienen el doble de calorias que los hidratos de carbono y las proteinas, eliminarlas totalmente de la dieta es un desproposito. Two types of polyunsaturated fatty acids are of particular importance in the diet, because they are used in the body, but cannot be synthesized by our enzymes or, indeed, by those of any mammal.
Both EPA and DHA are found in far higher concentrations in fish and marine mammals eating the fish. Following an appropriate stimulus, the fatty acid is freed and then converted into a certain paracrine, which is the category of regulatory molecule that acts locally on nearby cells. Too much of any fat in total will contribute to weight gain, so all are bad for your waistline.
Saturated fats are mainly from animal sources such as beef, butter, cheese and egg, plus coconut and palm kernel oils. Make these the basis of your meals and you’ll do both your heart and your waistline a favor. Any views or opinions presented in this article are solely those of the author and do not necessarily represent the opinions or recommendations of Fitness International, LLC. A study published last week in the Proceedings of the National Academy of Sciences demonstrates that digesting fatty foods enhances memory consolidation using the same neural pathway as emotional learning. This also eliminated the memory enhancement effect of OEA, indicating that emotional memory and memory enhancement from fatty food ingestion share the same neural network. Regularly seeking healthy fats in your diet can help control hunger, promote weight loss and lower risk of disease. Almonds, cashews, hazelnuts, macadamia nuts, peanuts, pecans and pistachios are highest in oleic acid. There is no substitute for a diet of whole foods rich in vegetables, beans, grains and fish. If you want to lose weight and live longer without disease, eat more vegetables and whole grains. In moderation they can also aid in weight loss, since they increase the satiety you feel after a meal. Focusing on long-term health is the best strategy for sustained weight loss, but it requires patience. Obviamente estamos hablando de grasas “buenas”, que nos aportan vitaminas liposolubles, minerales y beneficios para la salud.
You are going to encounter this type of paracrine frequently, and they are discussed in the webpage after the next. If the food item has one of these as a predominant ingredient, then consider passing on it. Anything sauteed has lots of butter, ‘chowder’ has cream, ‘stuffed’ or ‘loaded’ probably have cheese, and ‘crispy’ chicken has the skin on. To keep fat down, enhance flavors with spices, fresh herbs, lemon juice and vinegar instead of sauces, gravies and dressings.
But it now seems that healthy fats could also be a useful tool in overcoming emotional eating, a problem more complex than the standard weight gain that comes from 21st century living. A food that has no more than 1 gm saturated fat or where saturated fat provides no more than 15% of the total calories of the food is considered low saturated fat by labeling standards for packaging.
Saturated fats are notably high in ribs, sausage, pizza, meatballs, burgers, curry dishes, hollandaise sauce, quiche, omelets, and gourmet ice cream.
Read the menu description carefully to see if bacon, cream, or egg adorn the item, such as bacon wrapped asparagus. Cobb salad is the antithesis of low saturated fat as it’s full of egg, blue cheese and bacon.
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