
If we were to count the skincare rules that have been going viral in the skincare industry in recent years, "C in the morning and A at night" would definitely be on the list. Regular vitamin A and vitamin C serums can easily irritate the skin. As an authority on probiotic skincare, GLOWBIOTICS®’s powerful vitamin A and vitamin C serums are added with the signature PDBs probiotic ingredient to help soothe the skin and minimize allergies. In addition to applying sunscreen in the morning to prevent UV damage to the skin, applying vitamin C is also an indispensable step in the morning skin care routine! GLOWBIOTICS®'s two signature vitamin C and vitamin A essences are combined with the noble PDBs probiotic ingredient to give your skin barrier and skin base a perfectly healthy state!
GLOWBIOTICS® Morning C and Evening A + Probiotics = Stable antioxidant in the morning; Zero stimulation anti-aging at night

Vitamin C's effects on the skin
Sunlight can damage the collagen and elastin in our skin, while vitamin C can play the following three roles
- Collagen and elastin need the help of vitamin C to combine into a normal state
- Restore broken collagen and elastin to their original state
- Reduce melanin, inhibit the enzyme that produces melanin, and reduce the proliferation of pigmentation spots
Two criteria for selecting vitamin C: stability and pH value
Since traditional vitamin C (Ascorbic Acid) can only maintain its stability in an acidic environment, highly acidic vitamin C can easily irritate the skin. In addition, it is also easily oxidized and discolored. Therefore, when choosing a vitamin C essence, you must consider the stability and pH of its formula. A powerful vitamin C formula is extremely complex, ensuring that it is not oxidized while also being effective for the skin. GLOWBIOTICS®'s vitamin C essence is added with the flagship PDBs probiotics, and the double vitamin C complex formula ensures its effectiveness and stability, achieving low-irritation anti-oxidation, removing yellowness and darkness from the skin, and restoring bright white skin.
What percentage of vitamin C is effective?
The concentration of vitamin C in skin care products on the market ranges from 5% to 20%, but a higher concentration of vitamin C does not necessarily mean a better effect. The higher the concentration, the more irritating it is to the skin. 10%-20% can already achieve a very ideal antioxidant and brightening effect!
Can I still use Vitamin C after it turns yellow?
Vitamin C essence is very easy to oxidize and deteriorate, so its effectiveness will be greatly reduced. Oxidized vitamin C essence will form erythrulose, which will cause the skin to turn yellow and the complexion to look dull.
GLOWBIOTICS® Vitamin C Complex + Probiotics: Extremely Stable and Strong Antioxidant
GLOWBIOTICS® Probiotic Vitamin C Watery Brightening Essence is formulated with a dual vitamin C complex (5% Magnesuim Ascorbyl Phosphate + 5% Ascorbyl Glucoside) that does not require low pH to maintain stability, ensuring that it will not oxidize and exert its strongest effect. In order to allow people with sensitive skin to safely enjoy the whitening and anti-oxidant vitamin C, the ace PDBs probiotic ingredient is added to enhance the skin's self-healing ability, reduce skin irritation, and make the skin barrier stronger! In order to avoid oxidation of the vitamin C essence, the bottle head uses a vacuum pump head to completely prevent the essence from being oxidized and contaminated.
The biggest role of vitamin A: maintaining the skin's 28-day renewal cycle to fight aging
Vitamin A is known as the "universal essence". Its greatest function is to maintain the skin renewal cycle within 28 days, rearrange the underlying skin cells in a tight and orderly manner, and effectively improve the four major problems caused by skin aging: wrinkles, spots, enlarged pores, dull skin and other micro-aging problems.

GLOWBIOTICS® patented GDR Vitamin A formula is composed of retinoic acid and glycerin. It reaches the basal layer directly to activate cell genes without stimulating the epidermis. Minimize inflammation issues. Moreover, medical evidence shows that it can increase skin renewal rate by 60% in 48 hours and improve skin plumpness by 400% in 7 days. It is definitely an excellent anti-aging ingredient.