Beautiful package and retinol doesn’t cause any irritation after 1 week usage.
However the serum colour is quiet intense yellow and i keep thinking of it may become oxidised all the time even it may be original colour. ( i have bought two bottles of the ordinary retinoid emulsion that has a light yellow in colour while other new bottle has intense yellow in colour)
That will be great if there is high concentration of ascorbic acid serum from you ( ex. 15% ascorbic acid serum)
Regard
3 years ago
BOOST LAB Co has a
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