Explanation
In Germany, offering food is a gesture of hospitality and care, especially when meeting family. Refusing outright can be perceived as rejecting the host's effort and warmth, though a polite explanation (e.g., dietary restrictions or fullness) is usually accepted. It is generally safer to accept a small portion to show appreciation.
Local Tip
If you must refuse, say 'Nein, danke, ich bin wirklich satt' (No, thank you, I'm really full) with a smile and compliment the food.
How it compares elsewhere
Refusing food is often polite to show modesty, though hosts may insist.
Refusing food from a host is considered very rude and a rejection of generosity.
Refusing food can be seen as impolite, but dietary restrictions are respected if explained.