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What haircolor is right for me?

Ingredients or Formulas The simple answer is 'Not much'. Not any more than you can tell how a cake is going to taste by reading the recipe.

Let's take shampoo just as an example. Because manufacturers are required by law to list ingredients by there ppm (parts per million), water is usually the first ingredient in a shampoo. Take any shampoo that has water, as it's first ingredient. Then add 1/4 teaspoon of that shampoo to a gallon of water. If you write a new ingredient list it will read exactly the same. Do you think the shampoo will clean your hair? Will it even lather? Formulations are well-guarded secrets among manufacturers and rightly so. There is no way to tell how a product is going to perform without actually trying it.

As for ingredients that you may be allergic to, you can and should avoid them. But to try and determine how a cake is going to taste by reading the ingredients and without tasting it? Not even a professional baker could do that. All the ingredients are going to tell you are what kind of cake it is.

The following was taken from a mesageboard that was discussing ingredient listings where someone was trying to make a point about the amount of an ingredient in two given products. This was the response given by a person with a Phd in science and the point being made was that there is just not enough information in an ingredient listing to tell if one product is better over another or whether one product has more of an ingredient than another. I hope you find this interesting.

"Here is an example to try to clarify the point I made before:

The FDA requires that ingredients are listed in descending order of most parts per billion (quantity): Here are the actual ingredients for 2 products (shamelessly C&Pd from your earlier post). I have inserted hypothetical parts per billion (ppb) values next to each ingredient.

#11 Medium Auburn Ingredients:AFTER YOU ADD WATER (which is how you use it) WATER 999999045ppb, 2-Nitro-p-Phenylenediamine Sulfate 100ppb; 4-Amino-2-Hydroxytoluene 99ppb; 6-Cloro-2-Amino-4-Nitrophenol 98ppb; p-Phenylenediamine Sulfate 97ppb; Sodium Lauroyl Sarcosinate 96ppb; Sodium Sulfate 95ppb; Sodium Perborate 94ppb; Sodium Silicate 93ppb; Sodium 92ppb; Xanthan Gum 91ppb

Brand X Colour Permanent Haircolour Gel Ingredients: Water 999979210ppb, Cocamide Dea 1000ppb, Butoxyethanol 999ppb, Peg-2 Tallow Amine 998ppb, Alcohol Denat 997ppb, Polyglyceryl-4 Oleyl Ether 996ppb, Oleyl Alcohol,polyglyceryl-2 Oleyl Ether 995ppb, Propylene Glycol 994ppb, Oleic Acid 993ppb, Sodium Diethylaminopropyl Cocoaspartamide 992ppb, Ammonium Hydroxide 991ppb, Fragrance 990ppb, Pentasodium Pentetate 989ppb, Ammonium Acetate 987ppb, P-aminophenol 986ppb, P-phenylenediamine 985ppb, Metabisulfite 984ppb, Resorcinol 983ppb, Erythorbic Acid 982ppb, Methyl Pyrazolone 981ppb, 6-hydroxyindole 980ppb.

Now what is NOT important is if these numbers reflect reality. What IS important is that IF THERE WERE two products with this profile:

1: They would have their ingredients listed just as you originally listed them in your earlier post 2: The TOTAL amount of PPDs in RC would be 198 ppb versus Brand X which has PPDs of 985 ppb. 3. Brand X would have 5 TIMES more TOTAL PPDs than RC even though it lists only ONE PPD on its ingredients list and it is listed further down the ingredients list than RC.

I am NOT saying that RC has more PPDs than Brand X or that it has less. What I am saying and what I hope you get from this is that THERE IS NOT ENOUGH INFORMATION in the ingredients list to be able to tell the amounts of PPDs that RC has compared to Brand X. It IS IMPOSSIBLE to determine."