A premix is not a cheaper version of a single active. It is a process decision: fewer weighings, fewer chances to mis-dose a low-inclusion ingredient, and a shorter path from lab bench to production batch.
When a premix makes sense
If your formula uses two or more peptides at low inclusion levels, or your production site does not have precision weighing for gram-scale additions, a pre-dispersed blend removes a real source of batch variation.
When to stay with single actives
If you are still optimising ratios, or a claim depends on a specific concentration of one sequence, keep the components separate until the formula is locked. Changing a premix later means re-running stability.
Tell us your target ratios and base system, and we will quote both routes so you can compare handling cost as well as ingredient cost.