Anti-Lead Serum

Devised by Brainiac 5 and presumably based on the experimental Serum XY-4 (Adventure 300), the anti-lead serum protects Daxamites from lead poisoning and allows them to use their powers under a red sun. The raw materials are so scarce that only one dose can be produced every 48 hours. Curiously, Mon-El takes his serum every 8 hours; logically, he should run out after the first dose. This discrepancy remains unexplained.
One of the rare ingredients of the anti-lead serum is kryptonite.