let food = 'É*"12ºá-ç(^!@---$%&*())';
 
// sua solução: mantém muitos caracteres "ilegíveis" (aspas, hífen, cifrão, porcentagem, etc)
console.log(food.normalize('NFD').replace(/[\u0300-\u036f]/g, "").replace(/\s/g, '').replace(/\./g, '').replace(/[\])}[{(]/g, '').toLowerCase());
 
// talvez seja mais simples manter apenas as letras (ou seja, o replace remove tudo que não é letra)
// não ficou claro se é pra remover os números também, eu assumi que sim
console.log(food.normalize('NFD').replace(/[^a-z]/gi, "").toLowerCase());
 

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