As it may seem funny, but, chia seeds can make you choke. You are risking of gagging or choking on them. If you want to eat chia seeds, you may pre-soak or eat them without roasting. Chia seeds can absorb water (about 27 times their dry weight) in your food pipe, grow large, and clog up the food pipe, choking you.
Eating chia seeds could cause many health issues, including digestive and blood problems. You may be aware of these side effects before heavily relying on chia seeds in your diet.