Citric Acid is an odourless, crystalline powder it has been used in bait manufacture for decades. It is used across the human food industry as a preservative and is also used to stabilise colours. It is a highly stimulatory additive for carp/cyprinids, also enhances fruity flavours.
It is best to dissolve the citric acid in warm before adding to your eggs, remember to stir well once added.
Recommend inclusion level is up to 0.5% – (5g) per kg base mix. Remember using too much will make the bait repellant.