Can i use this after the aha serum?

I would add 2 drops and mix it with your serum.

any negative affects re ph balance?

I haven't had any negative effects. I just ordered my 4th bottle. My skin does so well with this product. Everything else makes me break out. This heals my acne and helps my skin look younger.

Should this product be put on by hand or with a cotton swab?

I put it on my hand, but it’s whatever you prefer.

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✨ Unlock your skin’s glow-up with science-backed hydration & repair!

HYDRATE GLOW - Hyaluronic acid locks in moisture for a fresh, dewy complexion all day long.
SOOTHES REPAIRS - Allantoin calms inflammation, acne, and irritation for balanced skin health.
K BEAUTY INNOVATION - Made in Korea with a lightweight gel formula that absorbs quickly and layers seamlessly.
GENTLE YET EFFECTIVE - Free from harsh chemicals and hydroquinone, safe for daily use under makeup.
POWER PACKED 10 NIACINAMIDE - Targets pores, wrinkles & uneven tone with clinical strength Vitamin B3.

Cos De BAHA Niacinamide 10% Serum is a Korean-made, lightweight gel serum combining 10% Vitamin B3, hyaluronic acid, and allantoin to visibly tighten pores, reduce wrinkles, soothe irritation, and protect skin from UV damage. Free from harsh chemicals, it delivers a youthful, even-toned, and hydrated complexion suitable for daily use under makeup.

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TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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Package dimensions	10 x 3.6 x 3.6 centimetres
Package Weight	0.06 Kilograms
Item dimensions L x W x H	35 x 35 x 98 millimetres
Item weight	2 Ounces
Brand	Cos De BAHA
Format	Gel
Volume	60 Millilitres
Scent	Unscented
Skin type	Normal
Speciality	free_from_preservatives, natural
Item model number	N30ml
Product Dimensions	3.5 x 3.5 x 9.8 cm; 56.7 g
ASIN	B07H3ZQ8R4

Cos De BAHANiacinamide 10% Serum 30ml - Tightens Pores, Reduces Wrinkles, Repairs Skin, Vitamin B3

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