Weight: ½ lb.
Estimated Value (Sane Cost Guide): 9,000 gp
DMG Value: 2,501 gp - 25,000 gp
When you drink this potion, your physical age is reduced by 1d6 + 6 years, to a minimum of 13 years. Each time you subsequently drink a potion of longevity, there is a 10 percent cumulative chance that you instead age by 1d6 +6 years. Suspended in this amber liquid are a scorpion's tail, an adder's fang, a dead spider, and a tiny heart that, against all reason, is still beating. The ingredients vanish when the potion is opened.
Source: DMG p188