Oak prices four tracked peptides, tesamorelin among them, but not one figure is on the site it advertises — every one lives in a checkout whose not-found path answers as though it were a real page.
What Oak charges
NAD+: $133/mo — per month, billed monthly on a non-recurring basis; the panel prints a struck-through $200 beside it
Glutathione: $135/mo — per month, billed monthly on a non-recurring basis; the panel prints a struck-through $150 beside it
Sermorelin: $133 — printed per month against a stated 4 week supply; the panel prints a struck-through $200 beside it
Tesamorelin: $133 — printed per month against a stated 4 week supply; the panel prints a struck-through $200 beside it
Oak is not a paid partner; this link may earn a commission if that changes. Full disclosure.
By Nora Castellan, Standards EditorUpdated September 2026
A checkout that says yes to everything
The nonsense-path control on this seller's checkout host returns a success code, not an error one.
Anything judging existence by status would have certified a fabricated address on this host as real.
Rendered, that address says in its own words that there is nothing there and that the reader is being redirected.
Every absence recorded on this row rests on the rendered document, never on the response code.
The marketing site prices nothing this comparison is about
The advertised site names its peptide categories and prices only its programs in general terms.
Its own category links lead through a capture step into a checkout on a related host, and that is where every figure lives.
Following the seller's own links is how those pages were reached; no address was constructed or guessed.
Two separate checkout entry points are needed to see all four compounds, because each shows only part of the menu.
A struck figure beside a live one, and a collision
Each medication panel prints a struck-through former figure immediately before the current one, and only the current one is recorded.
The banner across the top of both checkout pages prices two weight-loss lines rather than peptides.
One of those banner figures is numerically identical to the peptide figure below it, which is the exact condition under which a proximity match goes wrong.
Every figure was read inside its own medication panel, which is what keeps the two apart.
Four weeks is not a month
Two of the four compounds state a four-week supply beneath a rate the page prints per month.
Four weeks and a month are different lengths, and those two are stored as unperiodised rather than as monthly rates.
The other two carry no supply length and their page says billing is monthly and not recurring, so those are stored as monthly.
No pharmacy is named on either host, no state list is published, and no claim about lab work appears anywhere.
Who it's for
Readers looking for tesamorelin, which this seller prices alongside the more common growth-hormone peptide.
Buyers who want a growth-hormone peptide and an antioxidant priced by one seller.
Shoppers who prefer billing described as monthly and non-recurring to a subscription.
Anyone who wants the previous figure shown rather than quietly replaced.
Who should look elsewhere
Readers who expect the price to be on the site being advertised.
Buyers who need the dispensing pharmacy named.
Shoppers who need a state footprint or a registered company name.
Anyone who expects lab work to be part of what they pay.
Strengths
Prices four tracked compounds, tesamorelin and glutathione among them, rather than the growth-hormone line alone
States the supply length on the two compounds where it differs from a month
Says its longevity billing is monthly and non-recurring rather than a subscription
Shows the former figure alongside the current one instead of quietly replacing it
Trade-offs
Publishes no peptide figure on its marketing site; every price sits inside the checkout
Its checkout answers 200 at a nonsense path, so a status check alone would not catch a bad address
Names no dispensing pharmacy on either of its hosts
Publishes no state list and no corporate entity
How we verified this
Read every page cited on this row as rendered text in a real browser, not as served HTML, because several sellers in this pass ship the figure in by script and serve a bare currency sign.
Fired a nonsense-path control at this host in the same run and judged it on the rendered document rather than on its status code or its byte count.
Joined every text node before scanning for a currency sign, so a figure split across nested elements could not read as an absence.
Clicked every collapsed accordion on the pages read, because pharmacy names, state answers and lab conditions hid inside them on most sellers checked this pass.
Read each figure inside its own card or panel rather than by nearness to a compound name, on pages that price weight-loss lines beside peptide lines.
Recorded the seller's own published figure and never divided a multi-month total into a monthly one.
Screened this seller in the live federal warning-letter record by entity and by brand, with a known-good positive control and a nonsense negative control fired in the same run.
Read the company column of every returned record rather than accepting a full-text match, and attached no letter unless the letter itself named this seller's own domain.
Fired the nonsense-path control at the checkout host rather than only at the marketing host, and judged it on the rendered document after it answered with a success code.
Reached every priced page by following the seller's own links through its capture step, and constructed no address.
Read each figure inside its own medication panel, on a page whose banner prices a weight-loss line at a numerically identical figure.
Recorded the stated four-week supply as four weeks rather than treating it as a month.
A provider to compare Oak against
Trellis Vitality
Trellis Vitality frames its program around body-composition tracking rather than scale weight, pairing NAD+, glutathione and tesamorelin with at-home biomarker panels and a 90-day re-test, and names its dispensing pharmacy, VialsRX in Houston, by address.