Anyone who hasn't tried a spiritual discipline (such as fasting) really should. Belief isn't a prerequisite, and most faiths have some sort of variation on it.

Anyone who hasn't tried a spiritual discipline (such as fasting) really should. Belief isn't a prerequisite, and most faiths have some sort of variation on it. Whether it's a Buddhist retreat, fasting through Ramadan, fasting through Lent (my tradition, Orthodox Christianity has fairly strict fasting rules as an example), or a retreat at a monastery, spiritual discipline is a great way to withdraw from the world, focus on your inner self and learn to concentrate and deal with life's stresses. Even if you don't believe in deities, there is practical knowledge to be gained. Also keep in mind, spiritual discipline during fasting seasons should also be done in conjunction with prayer/meditation (depending on religion/tradition), so it offers more benefits than simply dieting.