Requesting Ayurvedic detox diets at local homestays

Yes, but you have to be very specific. Traditional Sri Lankan food is heavily reliant on coconut oil, coconut milk, and roasted spices. If you want a plain detox diet, ask them for simple boiled vegetables (like pumpkin or beans) and Kola Kenda (herbal leaf porridge). They are incredibly accommodating, but you must request it the day before so they know not to add the heavy coconut milk.