If you’ve ever snapped a fig off its branch, you’ve seen it: a drop of thick, milky-white liquid. That’s fig sap, often called fig milk — a natural latex produced by the common fig tree (Ficus carica). For centuries, people around the Mediterranean and Middle East have used it to treat warts and to curdle milk into cheese.
But fig sap also has a side most articles skip: it can cause serious skin burns when it meets sunlight. This guide covers what fig sap really is, how to collect it safely, the uses backed by evidence or long tradition, how to store it, and the safety rules you should know before you touch it.
What Is Fig Sap?
Fig sap is the milky latex that flows from the branches, leaves, stems and unripe fruit of the fig tree. Two groups of compounds make it interesting — and risky:
- Ficin — a protein-dissolving (proteolytic) enzyme. It’s the reason fig sap can curdle milk, tenderize meat and break down wart tissue.
- Furocoumarins (psoralens) — natural chemicals that make skin extremely sensitive to UV light. This is what causes fig sap burns.
Ripe figs contain very little sap, which is why the fruit itself is safe and delicious to eat while the raw sap is not.
How to Collect Fig Sap Safely
1. Pick the right time
The tree produces the most sap during the growing season, from late spring to late summer. Collect it early in the morning, in the evening, or in the shade — never in strong sun, because sap on your skin plus UV light can cause burns.
2. Protect yourself first
- Nitrile or rubber gloves (avoid latex gloves if you have a latex allergy)
- Long sleeves and long trousers
- Safety glasses — sap in the eyes is very irritating
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