Before dying, John tells Dean, if he can't save Sam, he'll have to kill him, should he become evil. The fourth season episode "On the Head of a Pin" reveals that the demon Alastair tortured John in Hell for over a century, with John refusing the demon's offer to stop if he himself would torture someone else.

So, there are basically two reasons, both closely related to his sons: His own efficiency, as they get him distracted, for he goes after a dangerous daemon (the yellow-eyed one), and thus worries about them getting killed. He is afraid to actually see them die, like he saw their mother die.

Certo and Sure Jell are two popular fruit pectins widely used for making homemade jams and jellies. Both these products are made from natural sources and provide a great way of making sweet preserves. They are both contain soluble fiber that is easily digestable.

Certo and grape juice (the purple pectin remedy) can lower cholesterol, make arteries more flexible and ease arthritis pain. One of the oldest home remedies in the People's Pharmacy pharmacopeia is a combination of Certo and grape juice for arthritis.