No, Vitamin C does not make the skin photosensitive. On the contrary, it provides proven additional protection against harmful UVA rays by enhancing the effect of sunscreen due to its antioxidant properties. However, it is important to note that Vitamin C itself does not provide sun protection, as it neither absorbs nor reflects UV rays. It must be combined with a sunscreen product.

Absolutely not. In fact, Vitamin C is known for its brightening properties and helps reduce the appearance of dark spots by inhibiting melanin production. For best results and to protect your skin from future pigmentation, we always recommend pairing it with a high protection sunscreen.

Yes, Vitamin C can be used on acne-prone skin, but with caution. The pure form, L-ascorbic acid, can potentially irritate and redden the skin, however, the form used in Biotrade Glow Serum with Vitamin C (3-O-Ethyl-L-ascorbic acid) is gentle to every skin, while keeping its high effectiveness from the pure form of Vitamin C. We still recommend introducing it gradually, starting with every other day and switching to daily use if the skin tolerates it well.
Vitamin C helps reduce redness, dark spots, and acne scars and is also known for its anti-inflammatory action.

Yes, Vitamin C and its beneficial effects are suitable for all skin types, including dry and sensitive skin.

Vitamin C should not be used in the same routine as retinol or other vitamin A derivatives, AHA and BHA acids, other acids, abrasive products (like scrubs), or products with benzoyl peroxide. The combination of these ingredients is possible by alternating them every other evening or by using them in separate routines — for example, one in the morning and the other in the evening.

Vitamin C serum should always be applied as the second step, after cleansing, on thoroughly cleaned and dried skin. After 15 minutes of applying it, follow with a moisturizer or apply sunscreen directly.

Ascorbic acid is the most well-known and pure form of Vitamin C. One of its major drawbacks is that the formula of pure Vitamin C is highly unstable and easily oxidises, which reduces the effectiveness of the active ingredient and shortens its shelf life. To stabilize the formula, ascorbic acid needs to be in a solution with a low pH of 3.5, which can in turn cause skin irritation.

3-O-ethyl ascorbic acid is an advanced, ultra-potent, and stable form of Vitamin C that penetrates the skin more easily and has little to no irritating or sensitizing effect.

Yes, it is necessary to use hydration alongside Vitamin C serum, as it helps lock in moisture and allows the active ingredients to work more effectively. Hydration should be applied at the end of your routine.

It is recommended to wait about 15 minutes to allow Vitamin C serum to fully absorb before applying the next product.

The recommended amount of Biotrade Glow Serum with Vitamin C is one full pump to cover the entire face.

Vitamin C is an active ingredient with many benefits for the skin. It is a powerful antioxidant, which has an anti-aging effect, brightens and evens the skin tone, stimulates collagen production, and has anti-inflammatory properties.

Vitamin C serum is best applied in the morning to enhance the effect of sunscreen protection product. It can also be used in the evening, as long as you’re not using retinoids or acids at the same time.

The first visible results from using the Biotrade Glow Serum with Vitamin C can be seen after 14 days of regular use. Optimal results are achieved after at least 3 months.

Biotrade Glow Serum with Vitamin C contains a very stable form of Vitamin C and does not require special storage, other than the specific temperature storage requirements, you should keep it below 25°C (77°F).

Vitamin C is safe to use. To eliminate any concerns, you can do a patch test on a small area of your arm to check for any skin reaction.
In very rare cases, people with extremely sensitive skin may experience stinging, redness, or itching. However, the 3-O-ethyl ascorbic acid in Biotrade’s serum is very gentle and generally causes no irritation.
Vitamin C is safe to use, but to eliminate any concerns, a patch test on a small area of the arm can be done to monitor how the skin reacts.
In very rare cases, people with highly sensitive skin may experience tingling, redness, or itching after application. The Biotrade Glow Serum with Vitamin C contains 3-O-ethyl ascorbic acid, which is extremely gentle on the skin and has no irritation effect.

Yes, Biotrade Glow Serum with Vitamin C can be used on the neck and décolleté areas, followed by an SPF 50+ sunscreen protection product.

These two ingredients should not be applied together in the same routine. You can use Vitamin C in the morning with sunscreen, and Retinol in the evening.
Using both regularly is a gold standard in anti-aging skincare and provides proven rejuvenating effects.

Yes, Biotrade Glow Serum with Vitamin C can be used as long as the condition is not in an active flare-up phase.

Yes, the serum is suitable for skin with atopic dermatitis, provided that there are no active flare-ups at the moment and a regular emollient care routine is in place to keep the condition under control. It should be applied just like on normal skin — apply the Biotrade Glow Serum with Vitamin C to clean, dry skin, and once fully absorbed, follow with a moisturizer or sunscreen

Rosacea is a delicate skin condition. Whether the serum is suitable depends on the severity of your rosacea. It’s best to consult a dermatologist who can assess your skin and provide expert advice.

Yes, the serum can be used year-round, but in order to guarantee the successful results of Vitamin C, you must combine it with a high-factor sunscreen protection cream.