What runs together.

The reason is not caution for its own sake. It is that two things started together cannot be told apart. If you begin three compounds in week one and feel better in week three, you do not know which one did it, and you will keep paying for the two that did not. Every protocol here starts one compound alone, adds the second at week five and the third at week nine, so that each one has a month on its own to show what it does.

There is a second reason. Most goals have one compound that does most of the work. Adding a fourth and a fifth does not add much to the result; it adds injections, cost and the chance of a reaction you cannot trace. The largest protocol built here is three compounds plus the water they are mixed with. Pick the names you are considering in the stacking checker and it says what our protocols pair, and never pair.

For shape, the fat-loss compound is the core and the repair blend is the support, because skin and joints need looking after while the weight comes off. For energy, NAD+ is the core and MOTS-c is the support on the larger protocols, one restoring the fuel and the other changing how it is made. For recovery and skin, the blend is the whole story: two repair peptides and the copper peptide in one vial, so that one injection does the work of three.

For strength, the growth hormone pairing is the core and tesamorelin is the support where the goal includes a leaner waist; both work on the same axis and are the one exception to the rule about running two of a kind, because they are already one compound each. For sleep, DSIP is the core and the growth hormone pairing is the support, deepening the very part of the night DSIP works on. For focus, semax and selank are alternatives, not a pair.

Across goals, the quiz often builds a protocol that leans toward the fat-loss compound and the repair blend for most people, because those two serve most goals as support. That is by design, and the protocol guide explains how the scoring arrives there.

Two fat-loss compounds at once. Retatrutide, tirzepatide and semaglutide are the same class; running two is a dosing error, not a stack. Two growth hormone compounds at once. The pairing and tesamorelin act on the same axis; stacking them doubles the cost and removes your ability to tell which one did anything. The blend beside its own contents: buying GHK-Cu, BPC-157 or TB-500 separately alongside the blend is paying twice for the same molecules.

Semax and selank at full strength together. They pull in opposite directions, one sharpening and one settling, and the protocol picks whichever problem is louder this month. And nothing new in the same week as anything else. That rule is the whole method.

The blend deserves its own line, because it is the most common mistake in a first order. It already contains the copper peptide and both repair peptides; the results sheet says so under the vial, and the only reason to buy one of them separately is a goal the blend does not serve, which the quiz will have said. None of these are dangers so much as wastes, with one exception: the fat-loss class stacked on insulin or a sulfonylurea without a prescriber's adjustment is a low-blood-sugar risk, which is why the quiz flags it and why the sheet carries a note for the person who can see your chart.

Week five, and only if the first four weeks were comfortable. The support is chosen by the quiz from the next strongest area in your answers, so a shape protocol usually adds repair, an energy protocol adds the mitochondrial compound on training days, and a sleep protocol adds the growth hormone pairing. If the core caused anything in the first month that has not settled, the support waits.

The third compound, on the largest protocols, joins at week nine and only if the first two are earning their place. By then the eight-week assessment has been done, and if the support did nothing, it is dropped before anything new is added. Adding is always the last option, never the first. Take it to a doctor who knows you before you begin.