This listing is for a 40g  size of retinoic acid peel (pre order) .
Product will be shipped out within 2days after order is confirmed.
Active ingredients in this product includes:
Retinoic acid (Tretinion) 4%
Niacinamide 5%
This product is used for collagen stimulation and elastin repair .
It is also used to treat photo damaged skin which has resulted in the excess production of melanin which appears as hyperpigmentation on the skin top layer.
Tretinion or retinoic acid is a vitamin A derivative that is very effective at accelerating the rate at which old cells are being replaced by new cells. This in turn reduces the amount of pigmented cells, causing the hyperpigmented areas to be less pigmented. 
This product has an exfoliating action that promotes skin regeneration. This treatment is irritating and can lead to skin dryness. Regular moisturizing of the skin with an appropriate care product is necessary.
This product is  also used for treating post inflammatory hyperpigmentation(PIH).
Instruction on how to use.
Gel is applied on a clean skin and  it is meant to dry on the skin for minimum of 8hrs before washing off. 
After washing off, do not apply any product on the skin for 24hrs except for sunscreen.
After 2-5days , the top skin will shed off leaving a refreshed glowing skin.
Result achieved mayb depend on the severity of the problem. 
A once in a week application may be necessary until pigmentation problem is solved. 
Use along with any Depigmenting product to enhance result..
Note: if using for stretch marks, apply up to 3-5 layers for deeper penetration. 
Please note that in some cases, acne proned individuals may experience skin purging and this is only temporary.