You can eat up to 20 quail eggs per day without any problem.
Most people do not eat 20 quail eggs per day though because that would really be too much for most people.
The most quail eggs people eat per day is around 3 to 5 quail eggs which is usually more than enough.
I've eaten 10 quail eggs in a day and that was enough for me.
I ate 5 quail eggs for breakfast and then ate another 5 quail eggs for lunch.
Quail eggs are delicious and in my opinion more delicious than chicken eggs and quail eggs are also rich in Vitamin A which is healthy for you.