Can egg whites be used as an antidote of lead and mercury poisoning?

Lead poisoning: Egg whites are absolutely worthless. Lead and mercury poisoning is a dire emergeny. If you suspect this get your child to an emergency room for proper treatment as soon as possible. If poisoning is slow and chronic then talk to your doctor about specialists that can treat for poisoning. This usually involves first of all stopping the source of poisoning.

Egg white remedy: Not that i'm aware of. The best remedies for heavy metal poisoning are IV chelation therapy, oral chlorella and glutathione, and sweat therapy (sauna). Iv chelation is your best bet.