Name: TirTir Niacinamide 20% Serum- 30ml
Brand: TIRTIR
Price: 2300.00 BDT
Availability: InStock
Rating: 4.9 (10 reviews)

Question 1

Is the TirTir Niacinamide 20% Serum available in Bangladesh?

Accepted Answer

Yes, it is available at koreanshopbd.com with Cash on Delivery across Dhaka and all districts nationwide. Contact the team via Facebook or Instagram to confirm current stock before ordering.

Question 2

What makes 20% Niacinamide different from regular Niacinamide serums?

Accepted Answer

Most serums use 2–5% Niacinamide, while this formula delivers 20% — four to ten times the standard concentration — for significantly faster and more visible results on pores, pigmentation, and oil control. It is one of the highest concentrations available in a Korean brightening serum.

Question 3

What does Alpha Arbutin do for dark spots?

Accepted Answer

Alpha Arbutin blocks tyrosinase, the enzyme responsible for triggering melanin production in the skin, gradually lightening existing dark spots and preventing new discoloration from forming. Combined with Niacinamide and Glutathione, it delivers a multi-pathway brightening effect.

Question 4

Is this serum safe for sensitive skin?

Accepted Answer

Yes, it is paraben-free, fragrance-free, and dermatologically tested, making it suitable for reactive and sensitive skin types with consistent use. If you have very reactive skin, patch test first and introduce it gradually — once daily before moving to twice daily.

Question 5

Can I use this serum with Retinol products already in my routine?

Accepted Answer

This serum already contains Retinol 500IU, so layering it with a separate high-strength Retinol product is not recommended, as it may increase the risk of irritation. Use this serum as your Retinol source and follow with a moisturizer and SPF in the morning.

Question 6

Should I use this serum in the morning or at night?

Accepted Answer

It can be used both morning and evening — apply after cleansing and toning, before moisturizer. In the morning, always follow with sunscreen, as Niacinamide and Retinol both increase the skin's sensitivity to UV exposure.

Question 7

How long does delivery take in Bangladesh?

Accepted Answer

Dhaka orders arrive in 1 to 2 business days. All other districts are delivered within 3 to 5 business days, with COD available.

৳ 2300 ৳2500

৳ 2300 ৳2500

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