How to Use Vitamin C Serum:
1. Wash and pat the skin dry.
2. Apply toner before using the vitamin c serum.
3. Apply a thin layer of vitamin c serum over the desired area, and allow drying.
4. After the vitamin c serum has dried completely, apply your favorite moisturizer.

*For better results, Neutriherbs recommends using Neutriherbs Vitamin C Series in your skincare routine!

When to Use Vitamin C Serum:
Apply morning and night, after cleansing and toning and before your moisturizer

Skin Concern:

1. Dullness
2. Sign of aging
3. Uneven texture

Function

1. This formula contains high-quality Vitamin C.
2. Mild and effective for skin, even sensitive skin.
3. Contains natural origin Hyaluronic Acid, Capable of holding over 1,000 times its weight in water to help hydrate, and plump skin.
4. Promote peeling off dead horniness which contains melanin, boosts skin luster, and makes skin moist, soft, healthy, and clear after use.

AQUA, 3-O-ETHYL ASCORBIC ACID-20（VITAMIN C-20), GLYCERIN, PROPYLENE GLYCOL, POLYGLYCERIN-6, NIACINAMIDE, PEG/PPG-14/7 DIMETHYL ETHER, ROSA RUGOSA FLOWER WATER, HYDROXYETHYL UREA, SODIUM HYALURONATE (HYALURONIC ACID), HYDROXYETHYLCELLULOSE, SACCHARIDE ISOMERATE, POLYSORBATE 20, BUTYLENE GLYCOL, ALOE BARBADENSIS LEAF JUICE （ALOE LEAF JUICE), GLYCYRRHIZA GLABRA (LICORICE) ROOT EXTRACT, ROSA CANINA (DOG ROSE) FRUIT EXTRACT, CITRUS JUNOS (XIANG CHENG) FRUIT EXTRACT , DISODIUM EDTA, MALTODEXTRIN, PEG-90M, PEG-40 HYDROGENATED CASTOR OIL, CITRIC ACID, SODIUM CITRATE, ETHYLHEXYLGLYCERIN, PHENOXYETHANOL, POTASSIUM SORBATE, SODIUM BENZOATE, PARFUM.

Q1. What are the benefits of vitamin C serum?

• Vitamin C levels in the skin can diminish due to aging and environmental factors, and vitamin C skincare products can help replenish these levels.
• Functions as an electron donor, inhibiting the formation of reactive oxygen species.
• Vital for stimulating ceramide production and strengthening the skin barrier.
• Reduces active inflammation.
• Acts as an essential cofactor for promoting collagen synthesis.
• Stimulates collagen and elastin gene expression and production.
• Inhibit the formation of melanin without skin toxicity and make skin lighter by improving hyperpigmentation and blemishes

Q2. How does vitamin C benefit the skin?

• Vitamin C is one of the top anti-aging ingredients, helping to brighten the skin while inhibiting melanin production. It enhances skin elasticity by boosting collagen and elastin production, making it effective for anti-aging purposes.

Application

Q3. Can I use vitamin C serum daily?

• Due to its high concentration of pure vitamin C, skin irritation may occur. It's recommended to patch test on the back of the wrist or neck before first use. Daily use is possible, but if irritation occurs, reduce the frequency of application. If severe irritation persists, use it with a moisturizer or consider discontinuing use.

Q4. What should you avoid mixing with vitamin C?

• Avoid mixing with hydroxy acids such as AHA and BHA as they may cause skin irritation when used with vitamin C.

Q5. What can be safely mixed with vitamin C?

• Tocotrienol, hyaluronic acid, ceramide, snail extract, and centella are compatible with vitamin C.

Q6. Should you apply vitamin C before moisturizer?

• Vitamin C should be applied before other skincare products. Using a light water-based vitamin C serum first, followed by a thicker cream, can enhance vitamin absorption.

Q7. Is it normal for vitamin C serum to have a strange smell?

• The serum does not contain added fragrances, but vitamin C naturally has a distinctive smell which does not affect the product’s efficacy.

Q8. Should I apply Vitamin C once or twice a day?

Use Vitamin C serum once daily, in the morning, for maximum protection and benefit throughout the day. Antioxidants are also beneficial at night, but Vitamin C isn't essential for your nighttime routine.

Q9. Are there products I should avoid while using Vitamin C serum?

Avoid using Benzoyl Peroxide with Vitamin C as it can reduce its potency. Use Benzoyl Peroxide in your evening routine and Vitamin C in the morning.

Q10. When should I apply my Vitamin C serum during my skincare routine?

Apply Vitamin C serum on freshly cleansed skin, following cleanser and toner. Then, proceed with other serums, moisturizer, and SPF, applying products from most fluid to least.

Q11. How should I store Vitamin C serum?

Store in a dark bottle (brown, blue, or green) to prevent light exposure and oxidation. Keep in a dark place like a drawer or cabinet, away from direct sunlight. Ensure the cap is tightly closed to avoid air exposure. Avoid high temperatures; manufacturers usually test formulations up to 30°C, but always check product instructions.

Q12. What should I look for when purchasing a Vitamin C serum?

Choose a serum with Ferulic acid, which enhances the antioxidant benefits of Vitamin C and E and neutralizes free radicals.

Q13. How long should I wait after applying Vitamin C serum before the next skincare product?

Allow 2 minutes for proper absorption before applying the next product.

Q14. What color should my Vitamin C serum be?

Vitamin C serum is typically light champagne or amber in color. It may darken slightly over time due to natural oxidation, which doesn't affect its efficacy. If your serum is dark or cloudy, significant oxidation may have occurred.

Q15. Why use Vitamin C serum if I already use SPF?

While SPF protects against UV rays, Vitamin C serum shields your skin from environmental damage and neutralizes free radicals. A serum with 10% or more L-Ascorbic acid enhances protection against sun damage and pigmentation.

Side Effects

Q16. Does vitamin C serum darken the skin?

• No, it helps brighten the skin and inhibits melanin formation.

Q17. Why does vitamin C cause burning, stinging, or redness?

High concentrations of pure vitamin C can cause irritation. And this one is with 15% VC, patch testing is recommended. For daily use, start with less frequent applications if irritation occurs. If severe irritation persists, use a moisturizer with the serum or reduce the frequency of use. If necessary, discontinue use.

Q18. Why does my Vitamin C serum tingle?

L-Ascorbic Acid serums at low pH can cause tingling due to their high potency and absorption capability. If you’re new to Vitamin C, consider starting with a lower concentration and higher pH.