What it is
Lithothamnion Calcareum Extract is derived from Lithothamnion calcareum, a red seaweed that builds a calcified skeleton naturally rich in calcium, magnesium, and other minerals. In cosmetic products it is used as a marine-derived conditioning ingredient that contributes minerals to the formula. It serves as a supporting botanical-marine additive rather than a functional sunscreen component.
Safety & warnings
Generally well tolerated as a marine mineral extract. Individuals with known marine or algae sensitivities may wish to patch test.
Origin & sourcing
Natural; sourced from the calcified red marine alga Lithothamnion calcareum.
History
The calcified alga, also known as maerl, has been used as a soil and mineral supplement, and the extract is applied in skincare as a marine mineral source.
Questions everyone asks
What is Lithothamnion calcareum?
It is a red marine alga that forms a hard, calcified, mineral-rich skeleton; an extract of it is used in skincare.
Why is it used in cosmetics?
It supplies skin-conditioning minerals such as calcium and magnesium and acts as a supporting marine additive.