Cos De BAHA Vitamin C Serum

Yes. For pure L-ascorbic acid, the most studied form of vitamin C, 10 to 20% is generally considered the effective range, and 15% sits in the middle. It's strong enough to visibly brighten dull skin and even out tone over time, while being more comfortable than 20% formulas for most people.

After cleansing and toner, apply 1 to 2 drops to your face, morning or night, and let it absorb for a minute before moisturiser. Morning use pairs well with sunscreen. If you're new to vitamin C, start every other day for the first week or two, then move to daily use if your skin is comfortable.

Pure L-ascorbic acid only stays effective in an acidic formula, so a light tingle for a minute after applying is normal, especially at first. It usually fades as your skin gets used to it. Strong burning, lasting redness or itching is not normal, so rinse it off and stop if that happens.

Pure vitamin C oxidises with air, light and heat. Close the dropper tightly after each use and keep the bottle in a cool, dark place, never in a sunny bathroom. Use it within six months of opening, as shown on the box. If the serum turns dark orange or brown, it has oxidised and should be replaced.

Yes, with a simple plan. Use vitamin C in the morning and retinol, such as Celimax Retinol Shot, in the evening, so they don't irritate each other. Niacinamide can be used alongside vitamin C. Avoid applying vitamin C on the same evening as AHA or BHA exfoliants, as the combination can be too strong.

It's fragrance-free with a short ingredient list, which helps. However, 15% pure vitamin C is acidic and can sting reactive or very dry skin. Patch-test on your jawline first, then start every other day. If your skin stays red or uncomfortable, stop, and ask our team about gentler vitamin C derivatives.

Skin often looks fresher and more radiant within two to four weeks of daily use. A more even-looking tone and lighter-looking dark spots usually take eight to twelve weeks. Daily sunscreen is essential, as UV exposure darkens spots and undoes progress. Vitamin C also helps defend skin against environmental stress, making it a good morning step.

Yes. It's a simple, effective step for men dealing with dull skin, uneven tone or dark marks left after shaving or breakouts. Apply 1 to 2 drops in the morning, but wait a few minutes after shaving, as vitamin C can sting freshly shaved skin. Follow with a light moisturiser and sunscreen.