Are these the ingredients on your bottle? (I got this from their website)
water, decyl glucoside, sucrose laurate, betaine, glycerin, coco-glucoside, glyceryl oleate, sodium cocoyl hydrolyzed soy protein, coco-betaine
, lauryl glucoside, fragrance, citrus grandis (grapefruit) seed oil, citrus aurantium dulcis (orange) peel oil, citrus nobilis (tangerine) oil, citrus medica limonum (lemon) oil, citrus aurantium amara (petitgrain) oil, hydroxypropyltrimonium honey, glucose, citric acid, xanthan gum, sodium chloride, phenoxyethanol, glucose oxidase, lactoperoxidase.
I've never seen betaine by itself before this shampoo, so I'm not sure (I also don't use shampoo, so I'm not anywhere near an expert on the topic). But this says it should have coco betaine in it, which we know will do the trick. Hopefully your ingredients match