L-Carnitine at 250mg/ml is generally a saturated solution when it is at 1.5% BA and it is difficult for us to dissolve more than that, and therefore often it contains an undissolved and floating solute deposit, in aqueous solution is the equivalent of crashing in oils, by slighly heating in water bath and shaking these solute can disappear, I asked Mands to share some pictures or possible video with me to see this together, because it's clear that the goal of buying finished products is not having to bother with filtration, if it is proven that they are floaters, the necessary will be done to compensate the customer, although knowing L-Carnitine and what it looks like I suspect that this is the case.
cheers