Shampoo, body wash, and hand soap are the same ? Keep in mind that the first thing listed in ingredients, is what there is the most of. And what is listed last on the list of ingredients is what there is the least of.
With that in mind note that the above labels show identical ingredients, yet one is shampoo and the other is body wash. If you want to go one further, look at the ingredients on hand soap. A 64 fluid ounce bottle of hand soap that sells for $3.80 has the same ingredients as the 12 fluid ounce body wash that sells for $3.95. That's a 400% markup over the hand soap that has the exact same ingredients. Now not all soaps have the exact same formula but if the first five ingredients are the same I would say that's a very close match. So the next time you go shopping for shampoo and body wash, remember hand soap with the same ingredients sells for 400% less. Also note that store brands are more likely to use the same ingredients in their soap products. In the examples that I have shown here remember that it took several comparisons before I found an exact match but only the first 5 or 6 ingredients need match.
The real question that we should be asking is how many other products are they doing this with?