Please allow me to comment -
Vitamin C (L-ascorbic acid) (Fine) vs
Safe-B3 ™ (
Niacinamide ) should not be in the same formula. because of the group
Vitamin C Either way, it can bind to
Vitamin B3 and then form a new substance. which causes the original substance to deteriorate and will make the product become yellow-orange like rust color faster I will not dare to apply it to my face. And can cause skin irritation in people with sensitive skin. - Using
Vitamin C (L-ascorbic acid) (Fine) The formula must include
Disodium EDTA to always hold charge. to prevent the deterioration of
L-ascorbic acid - Using
Vitamin C (L-ascorbic acid) (Fine) In the formula it is recommended to use
Protec™ OX and
Protec™ UV in the formula to help protect
Vitamin C from deterioration - using
Vitamin C (L-ascorbic acid) (Fine) in the formula, the PH value should be adjusted in the formula. The formula must have a pH between 2.0-4.0. pH must be at least 3.5) - Using
Vitamin C (L-ascorbic acid) (Fine ) mixed in cosmetics should add
Ferulic Acid and
Vitamin E to reduce oxidation or add
Glutathione (L-Reduced type) to reduce oxidation caused
L-ascorbic acid No quality loss, thank you.