Why is the retinol serum bright yellow?Updated a year ago

That's the naturally occurring color of the most effective and gentle retinol on Earth!

All retinoids are derived from Vitamin A––which is a cousin of beta-carotene, the bright orange molecule that gives carrots and other vegetables their color. Protocol uses retinol in its bioactive (or as we call it "enzyme-active") state, called retinal. This is the form that is naturally created by your skin when you apply regular Vitamin A retinol to it. This form is naturally bright, powdery yellow!