NUTRICIÓN Y ALIMENTACIÓN

     Nutrición es el conjunto de procesos merced a los cuales el organismo recibe, transforma y utiliza las sustancias químicas contenidas en los alimentos, que constituyen los materiales necesarios y esenciales para el mantenimiento de la vida.

     Alimentación es, en cambio, la forma y manera de proporcionar al cuerpo humano esos alimentos que le son indispensables.

     Ambos conceptos son, esencialmente distintos: la Alimentación es la consecuencia de una serie de actividades, conscientes y voluntarias, en virtud de las cuales el ser humano se proporciona sustancias aptas para su consumo, las modifica partiéndolas, cocinándolas, etc., y acaba introduciéndolas en la boca, masticándolas y deglutiéndolas, también de modo voluntario y consciente. A partir de aquí acaba la Alimentación y empieza la Nutrición; esos alimentos son digeridos, las sustancias nutritivas que contienen son absorbidas, transportadas a los tejidos y utilizadas por éstos. Todo ello se realiza de modo involuntario e inconsciente. Podemos elegir comer carne o comer verduras, pero en cambio, no depende de nuestra voluntad absorber o no los aminoácidos o las vitaminas contenidas en esos alimentos, ni podemos tampoco influir en su ulterior destino y uso.

 De sendos conceptos se pueden hacer tres importantes reflexiones:

  1. Hay muchas maneras de alimentarse y sólo una de nutrirse. Podemos comer patatas o naranjas, pero la vitamina C que contienen se utiliza igual si es de una o de otra procedencia.

  2. Puesto que la Alimentación es voluntaria y consciente, puede ser influenciada por la educación que se imparta al sujeto. En cambio, la Nutrición, al ser involuntaria e inconsciente, no es educable. Podemos enseñar a una persona a comer determinados alimentos, pero no podemos enseñar a su hígado a que transforme de uno u otro modo las vitaminas que recibe.

  3. La Nutrición del hombre depende, esencialmente, de su Alimentación. El organismo utiliza lo que recibe y en ausencia de enfermedad, toda persona bien alimentada está bien nutrida, y, lógicamente, toda persona mal alimentada está deficientemente nutrida.

 
 

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