Iv'e always had chemical allergies big time !!! Just so everyone knows and this may help you, the product LOGONA is great !! but all LOGONA is HENNA that it for the hair it's the exact same you can find it in any arabic grocery store. I just found this out my friend was using LOGONA and i opened the box and i said Wow this is Henna and she said really i said yes their is such a thing as henna for the hair, i asked how much she paid and she said $23 INCLDING SHIPPING. I took her to an arabic market here in downtown Phoenix and the had boxes of henna in every color for $5.00 and yes it is the same exact porder same smell same color everything. PPD FREE no allergies and pure henna is all but you have to make sure it's for the hair. When you see the box there is a woman on each box and every box shown different color black, red, blonde etc...You can leave Henna in your hair for 7 hours and it will catch all your gray just make sure you wear a cap if you do leave it on..i would not reccomend that you leave it on for 2 hours it wont do much of anything. Henna in the arab world the woman leave it in over night and sleep with it on remember you can leave it on overnight no problem you will get no reaction. Myself b efore i started using Henna i was in the emergency room 3 time getting steroid shot..not anymore EVER !!! make sure to leave it in as long as possible for best results especially if your covering gray otherwise it will not catch the grey.

PS. II lived in Dubai and Lebanon and all the woman use this as myself incluing so i do know what im talking about there is know difference between LOGONA and Henna for the hair you can buy in any ARABIC grcery store...do the homework.