Sikhi on Fasting
Sikhi does not regard fasting as religiously meritorious. God has given us the human body - the temple of the soul - which has to be nourished and cared for. Fasting as an austerity, as a ritual, as a mortification of the body by means of willful hunger is forbidden in Sikhism. Guru Nanak says: "Penance, fasting, austerity and alms-giving are inferior to 'The Truth'; right action is superior to all."
Please see the page Guru Granth Sahib on pilgrimage and fasting for further information.