Unfortunately it is impossible to predict how many days, because you do not know what have the chicken been fed with.
I have read a study that sampled chicken livers for a detailed chemical analysis. The values were consistent for a given producer, but between producers the content of vitamin A could vary ten times. There is no doubt that chicken from the brands with high vitamin A content have been fed with vitamin supplements.
The values of typical vitamin A content for chicken liver that you see in various databases correspond to traditionally fed chicken and if you would eat such chicken livers to cover about half of your daily protein intake that would be slightly below the maximum acceptable intake of vitamin A. Raw chicken liver has slightly more than 1/6 of its weight as protein. Cooked chicken liver retains about 2/3 of the weight of raw chicken liver, due to losing water.
Unfortunately, you cannot know whether the chicken liver that you buy is not one of those with much higher vitamin A content, and the excess of vitamin A is eliminated very slowly from your body.
Eating chicken liver for a week from time to time should not cause any problems, but you cannot use them as a staple food, like you can with the more expensive and more bland chicken breast.
I have read a study that sampled chicken livers for a detailed chemical analysis. The values were consistent for a given producer, but between producers the content of vitamin A could vary ten times. There is no doubt that chicken from the brands with high vitamin A content have been fed with vitamin supplements.
The values of typical vitamin A content for chicken liver that you see in various databases correspond to traditionally fed chicken and if you would eat such chicken livers to cover about half of your daily protein intake that would be slightly below the maximum acceptable intake of vitamin A. Raw chicken liver has slightly more than 1/6 of its weight as protein. Cooked chicken liver retains about 2/3 of the weight of raw chicken liver, due to losing water.
Unfortunately, you cannot know whether the chicken liver that you buy is not one of those with much higher vitamin A content, and the excess of vitamin A is eliminated very slowly from your body.
Eating chicken liver for a week from time to time should not cause any problems, but you cannot use them as a staple food, like you can with the more expensive and more bland chicken breast.