Chamaecyparis Obtusa Leaf Extract
Explained
This ingredient comes from the leaves of the Japanese cypress tree that is also called Hinoki. The leaves are rich in flavonoids with quercitrin being one of its key actives.
A 2023 study tested a 70% ethanol extract on UVA-stressed, collagen-producing skin cells. Across multiple antioxidant tests, this extract protected skin from free radicals at meaningful rates.
And the coolest part? At 1000 µg/mL, it blocked two enzymes (collagenase and elastase) almost as well as vitamin C did at the same dose. Collagenase and elastase are the enzymes that break down your skin's collagen and elastin over time.
The same study found this ingredient lowered skin-breakdown enzymes and inflammation signals while bumping up collagen production in UV-stressed cells.
A 2024 follow-up tested a fermented version (fermented with mushroom) and it calmed down several key inflammation markers in irritated immune cells. So besides anti-aging, this ingredient can also help soothe skin.
Most of the data right now is still at the cell-culture stage rather than from human clinical trials. However, there's no harm in adding this ingredient to your routine.
Just be sure to patch test if you have a history of sensitivity toward botanical extracts.
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