If you don’t know where a yogurt brand sources its gelatin from, is it permissible to eat?
If the yogurt is manufactured in a Muslim country, it is permissible to acquire it and eat it, and there is no need for investigation even if you suspect its purity or the purity of its original ingredients. However, if it is manufactured in a non-Muslim country, and you are aware that it contains gelatin from an animal source, it is not permissible to eat, for the gelatin is considered impure in this case. If you are unsure that the yogurt contains gelatin, then it is permissible to eat, without the need to investigate.