Compounded tirzepatide
Collective vs Science & Co
Checked in . Both sellers are re-checked on the same schedule; a price either side changes after that date will not be reflected here until the next check.
Quick answer
Collective costs $86 a real month and Science & Co costs $141 — a difference of $55 a month, or $665 a year. Both figures are computed from what each seller actually charges and how often, not from the price on its landing page.
What each one bills
| Collective | Science & Co | |
|---|---|---|
| True monthly cost | $86 | $141 |
| Advertised as | $69 | $125 |
| Charged | every calendar month | every 30 days |
| Each charge | $69 | $139 |
| Price basis | the same at every dose | the same at every dose |
| Mandatory recurring fee | $17 a month | none found |
| States it names | not published | claims every state |
| FDA warning letter | none on record | none on record |
Where they actually differ
- They bill on different clocks. Collective charges every calendar month and Science & Co charges every 30 days. That alone changes what a “month” costs, which is the whole reason this index recomputes every price.
- Only one carries a mandatory recurring fee. Collective: $17 a month. 360 of 382 sellers charge nothing like it.
- What they advertise is not what they bill. Collective advertises $69 and bills $86; Science & Co advertises $125 and bills $141.
How we know
Both figures were read on the seller’s own site and recomputed over a 30.4375-day calendar month from the charge and the billing period it covers. Neither is a seller’s own “/mo”. The full working for each — the charge, the period, the arithmetic and the date it was read — is on its own page: Collective and Science & Co. The method is set out in how we verify.
To compare any two sellers in the index rather than these two, use the comparison tool.