Keratin treatments are best for thick, curly, frizzy or coarse hair. Because it actually repairs hair, keratin treatments are also good for damaged or chemically treated hair (colored, permed, relaxed, highlighted or bleached). Keratin treatments are not intended for fine, straight or thin hair.
According to this same report, alcohol abuse and addiction have a social cost of roughly $185 billion each year, while tobacco addiction has a social cost of roughly $193 billion a year. When combined, the costs for these three categories of use equal about $559 billion per year.
Anyway, to directly answer your question, prices can vary from about $50 up to $400 per gram (note that these are the extremes, most is going to be from $100 to $300). Source(s): I am a recovering heroin addict.