The article explains the restriction through the gunas and a Sattvic approach to the household observance. Its claims about the effects of foods are part of the source's spiritual and Ayurvedic framing.
The Ban on Tamasic Foods in Chhath
During the entire four-day duration of Chhath Puja, garlic and onions are strictly prohibited not just in the Vrati's meals, but inside the entire household.
The Ayurvedic and Spiritual Reason
In Ayurvedic philosophy, foods are categorized into three gunas: Sattva (pure), Rajas (stimulating), and Tamas (lethargic/ignorant). Onion and garlic are classified as Tamasic and Rajasic. They are believed to induce heat, passion, and lethargy in the body, which distracts the mind from spiritual focus. To maintain a calm, highly disciplined, and pure mindset required for the 36-hour fast, a strictly Sattvic diet is enforced.