Coix Lacryma-Jobi Seed Water

Coix Lacryma-Jobi Seed Water is derived from Job's tears, an East Asian grain crop. The seed extract is processed into a water-based ingredient that functions primarily as a skin conditioner, helping to support the skin's moisture balance and hydration levels.In skincare formulations, it works as a lightweight hydrating agent. The ingredient has been studied for its potential protective effects against UV-induced skin damage, though most research to date has been conducted in laboratory settings rather than on living human skin.

The ingredient appears to work by supporting aquaporin-3, a protein that functions as a water channel in skin cells. UVB radiation can reduce aquaporin-3 levels, which contributes to skin dehydration and photoaging. Laboratory research suggests that compounds in Coix Seed extract may help preserve aquaporin-3 function under UV stress, potentially maintaining the skin's ability to retain moisture.It also contains compounds that may have antioxidant properties, though the extent of these effects in real-world skincare use requires further investigation.

This ingredient is typically found in essences, toners, serums and hydrating products. Use it as part of your regular hydrating routine, ideally applied to damp skin to help lock in moisture. It pairs well with other hydrating ingredients and can be layered under heavier moisturisers or oils if your skin needs additional nourishment.

Generally well-tolerated and suitable for most skin types. No significant safety concerns have been documented, though those with known sensitivities to plant extracts should patch-test first.