If you’re a K18 fan, you know the science behind these peptide-powered hair savers is serious. But the prices? They can vary wildly from one store to another. This week (July 6–13, 2026), we’ve crunched the numbers on TajPrice to find the K18 products with the biggest cross-store price differences in Iraq. Whether you’re stocking up on your holy-grail leave-in mask or trying the detox shampoo for the first time, a quick comparison could save you tens of thousands of dinars.
First up, the biggest spread of the week belongs to 
K18 - Peptide Detox Shampoo 250ml. With a 20.1% gap between the lowest and highest price, you can grab it for as low as 32,630 IQD at one of three stores. That’s a potential saving of over 6,500 IQD if you shop smart. Ideal for heavy product users and oily scalps.
Next, the cult-favorite 
K18 Leave-In Repair Hair Mask - 50ml shows a 19.6% spread. Available at only two stores, the best price is 53,625 IQD – but one retailer lists it at 64,125 IQD. That’s a 10,500 IQD difference for the same 50ml bottle. Don’t overpay.
For heat styling lovers, 
K18 HeatBounce Conditioning Heat Protectant - 118ml has an 18.3% spread. With four stores carrying it, the best price is 49,500 IQD. The highest? 58,548 IQD. Resilicore™ technology protects up to 232°C – worth hunting for a deal.
Another shampoo with a solid gap: 
K18 Damage Shield Ph Protective Shampoo , 250 ml offers a 16.5% spread. Best price 32,630 IQD, worst 38,000 IQD. Designed for chemically treated hair, this pH-balanced formula is a must-have for many.
Leave-In Molecular Repair Hair Mask (50ml) has a 15.8% spread – best at 61,750 IQD, but some stores charge up to 71,500 IQD. That’s nearly 10,000 IQD you could keep in your pocket.
Even smaller sizes show savings: 
K18 Leave-in Molecular Repair Hair Mask - 15ml has a 12.3% spread (best 42,525 IQD, worst 47,750 IQD). Perfect for a trial or travel.
If you want a starter kit, 
K18 Biomimetic Hairscience Future Faves Minis includes three minis with an 11.1% spread. Best price 59,400 IQD – save up to 6,600 IQD.
K18 Damage Shield Conditioner offers a 10.7% spread (best 33,930 IQD). Great for pairing with the damage shield shampoo.
For a quick fix, 
K18 Leave-In Consumer Hair Mask - 5ml has a 10.3% spread – best 13,050 IQD, worst 14,400 IQD.
Finally, 
K18 pH Optimized Color Safe Shampoo - 250ml closes the list with a 9.7% spread (best 36,000 IQD). Safe for daily use and color-treated hair.
Remember: prices can change, so always check TajPrice before you buy. Happy saving!