El peligro de las grasas trans

Las grasas trans son ácidos grasos insaturados que tienen al menos un doble enlace en la configuración trans . Si bien hay pequeñas cantidades de grasas trans naturales en la carne y los productos lácteos de vacas, corderos y otros rumiantes, la gran mayoría de las que forman parte de nuestra dieta se producen industrialmente y están contenidas en alimentos elaborados con aceites vegetales parcialmente hidrogenados. La hidrogenación parcial, que convierte los aceites vegetales en grasas semisólidas para uso en margarinas, cocina comercial y procesos de manufactura, transforma aproximadamente 30% de las grasas naturales en grasas trans. En los EU, el promedio de consumo de grasas trans es del 2 al 4% del total de la energía, y las fuentes principales son la comida rápida frita, los productos de panadería (pasteles, galletas, muffins, pays, etc.), las botanas empacadas, las margarinas y el pan.

Existen evidencias considerables de los efectos dañinos del consumo de grasas trans. Además, las grasas trans resultantes de los aceites parcialmente hidrogenados no tienen ningún valor nutritivo intrínseco. Por ello, no se puede justificar el uso de aceites parcialmente hidrogenados en comparación con otros aceites o grasas naturales. Es importante que los efectos perjudiciales se perciben a partir de niveles muy bajos de consumo: por ejemplo, 1 a 3%, o aproximadamente 2 a 7 gramos (20 a 60 calorías) en el caso de una persona que consume 2000 calorías al día. Así, puede ser necesario evitar total o casi totalmente las grasas trans industriales (≤0.5% de la energía) para prevenir los efectos perjudiciales y minimizar los riesgos a la salud.

En 2004 Dinamarca fue el primer país que puso límites legales al contenido de grasas trans de los alimentos, eliminando en gran parte las grasas trans industriales de todos los comestibles (incluyendo los que se sirven en restaurantes) en ese país. Canadá está estudiando una legislación similar y la ciudad de Chicago también está considerando prohibir las grasas trans industriales en los restaurantes. Si los restaurantes y los fabricantes de alimentos no eliminan de manera voluntaria las grasas trans (como ha sucedido en gran medida en Holanda), hay varios puntos que validan la necesidad y la importancia de tomar medidas legislativas para reducir el consumo de las grasas trans.

To continue reading, please log in or enter your email address.

Registration is quick and easy and requires only your email address. If you already have an account with us, please log in. Or subscribe now for unlimited access.

required

Log in

http://prosyn.org/PTB0fT3/es;
  1. Television sets showing a news report on Xi Jinping's speech Anthony Wallace/Getty Images

    Empowering China’s New Miracle Workers

    China’s success in the next five years will depend largely on how well the government manages the tensions underlying its complex agenda. In particular, China’s leaders will need to balance a muscular Communist Party, setting standards and protecting the public interest, with an empowered market, driving the economy into the future.

  2. United States Supreme Court Hisham Ibrahim/Getty Images

    The Sovereignty that Really Matters

    The preference of some countries to isolate themselves within their borders is anachronistic and self-defeating, but it would be a serious mistake for others, fearing contagion, to respond by imposing strict isolation. Even in states that have succumbed to reductionist discourses, much of the population has not.

  3.  The price of Euro and US dollars Daniel Leal Olivas/Getty Images

    Resurrecting Creditor Adjustment

    When the Bretton Woods Agreement was hashed out in 1944, it was agreed that countries with current-account deficits should be able to limit temporarily purchases of goods from countries running surpluses. In the ensuing 73 years, the so-called "scarce-currency clause" has been largely forgotten; but it may be time to bring it back.

  4. Leaders of the Russian Revolution in Red Square Keystone France/Getty Images

    Trump’s Republican Collaborators

    Republican leaders have a choice: they can either continue to collaborate with President Donald Trump, thereby courting disaster, or they can renounce him, finally putting their country’s democracy ahead of loyalty to their party tribe. They are hardly the first politicians to face such a decision.

  5. Angela Merkel, Theresa May and Emmanuel Macron John Thys/Getty Images

    How Money Could Unblock the Brexit Talks

    With talks on the UK's withdrawal from the EU stalled, negotiators should shift to the temporary “transition” Prime Minister Theresa May officially requested last month. Above all, the negotiators should focus immediately on the British budget contributions that will be required to make an orderly transition possible.

  6. Ksenia Sobchak Mladlen Antonov/Getty Images

    Is Vladimir Putin Losing His Grip?

    In recent decades, as President Vladimir Putin has entrenched his authority, Russia has seemed to be moving backward socially and economically. But while the Kremlin knows that it must reverse this trajectory, genuine reform would be incompatible with the kleptocratic character of Putin’s regime.

  7. Right-wing parties hold conference Thomas Lohnes/Getty Images

    Rage Against the Elites

    • With the advantage of hindsight, four recent books bring to bear diverse perspectives on the West’s current populist moment. 
    • Taken together, they help us to understand what that moment is and how it arrived, while reminding us that history is contingent, not inevitable


    Global Bookmark

    Distinguished thinkers review the world’s most important new books on politics, economics, and international affairs.

  8. Treasury Secretary Steven Mnuchin Bill Clark/Getty Images

    Don’t Bank on Bankruptcy for Banks

    As a part of their efforts to roll back the 2010 Dodd-Frank Act, congressional Republicans have approved a measure that would have courts, rather than regulators, oversee megabank bankruptcies. It is now up to the Trump administration to decide if it wants to set the stage for a repeat of the Lehman Brothers collapse in 2008.