There is no technical limit on how many Chia seeds you can eat in one day, but it is recommended that they are consumed in moderation. Many nutritionists suggest a daily dose of 20 grams, or roughly two tablespoons.
Chia seeds are rich sources of antioxidants and omega-3 fatty acids. They are also 25 percent fiber, so can cause gas and bloating. They soak up a lot of water in the body, so it is important to drink plenty of fluids to compensate. Chia was used by ancient Aztec and Mayan civilizations for both nutritional and medicinal purposes, and the term "chia" comes from the Aztec word for "strength."