Why white label fits this category.
A buyer of creatine, whey or an electrolyte mix already knows what is in it. They are not looking for a novel formula, they are looking for one they trust at a dose they recognise, from a brand they want to be associated with.
That makes the formula the least differentiating part of the product, which is precisely when starting from an existing one makes sense. You are not giving anything up that the customer was buying.
It also means your first batch can be in hand while the brand is still being built. That is the order most successful launches happen in, rather than the other way round.
Starting from a ready formula is not generic.
Flavour, sweetener, serving size, scoop, tub, sachet and label are all yours, and each of them changes how the product is read on a shelf or a product page. Two brands can start from the same base and end up nothing like each other.
Pack format is the most underrated of those choices. A tub, a pouch and a box of stick packs sell to different people at different prices, and the same powder in a different pack can move a product from a training bag to a desk drawer.
Where you do want to differentiate, do it deliberately: one branded ingredient, one dose that is genuinely better, or one flavour nobody else has done well. That is affordable. Redesigning the whole formula usually is not.
What to get right before the first run.
Decide your market before your packaging. The US and the EU do not permit the same ingredients, the same doses or the same wording, and finding that out after the labels are printed is an expensive way to learn it.
Order samples of every flavour you intend to sell, and taste them mixed the way a customer will mix them, in cold water, in a shaker, quickly. Powders behave differently in a lab than in a gym.
Then keep the range short. One or two products done properly outsell five done thinly, and a short range is far easier to keep in stock, which is the thing that actually kills early sport brands.
