📅 Last updated: May 2026
How Long Does Vitamin C Serum Last?
Vitamin C is well-known for its ability to brighten skin, reduce hyperpigmentation, stimulate collagen production, and protect skin from environmental damage. Like many active ingredients, Vitamin C has a shelf life and its potency can degrade over time. For acne-prone skin, always choose non-comedogenic, dermatologist-tested formulas that won't clog pores.
How Long Does Vitamin C Serum Last?
Vitamin C serum can last anywhere from 3 to 6 months after opening, depending on formulation, concentration, and storage conditions.
1. Concentration of Vitamin C
Higher concentrations (20% and above) are more likely to degrade faster due to oxidation when exposed to air, light, and heat.
2. Packaging
Opaque or dark-colored bottles protect serum from UV light. Air-tight packaging prevents oxygen exposure, preserving potency.
3. Storage Conditions
Temperature and light exposure influence shelf life. Heat and light cause faster degradation. Store in cool, dark place.
How to Tell if Vitamin C Serum Has Expired
1. Change in Color
Fresh Vitamin C serum is light to medium amber. Drastic darkening to yellow or brown indicates loss of effectiveness.
2. Strong Unpleasant Odor
Sour or pungent smell indicates Vitamin C has oxidized and is no longer effective.
3. Separation or Texture Change
Separation, graininess, or unusual thickness are signs the serum is losing potency.
How to Store Vitamin C Serum
1. Keep in Cool, Dark Place
Away from direct sunlight. A bathroom cabinet or drawer away from the sink is ideal.
2. Seal Bottle Tightly
Minimize exposure to air after each use. Oxygen causes Vitamin C to break down faster.
3. Refrigerate (Optional)
Refrigeration can slow oxidation process, especially for higher-concentration serums.
4. Avoid Temperature Fluctuations
Avoid areas with extreme temperature changes like near windows or radiators.
How Long Does Millionaire Glow Serum Last?
Dr. Crazy Beauty's Millionaire Glow Serum has shelf life of up to 6 months after opening when stored correctly. Dark, air-tight bottle protects Vitamin C from light and oxygen.
FAQs
Vitamin C serum lasts 3-6 months after opening. Store in cool, dark place. Darkening color, unpleasant odor, or texture changes indicate expiration. Refrigeration helps extend shelf life.
Conclusion
Proper storage is key to ensuring Vitamin C serum remains effective. Millionaire Glow Serum by Dr. Crazy Beauty offers stable, effective Vitamin C formula that lasts up to 6 months when stored properly.
