Our pickBioLongevity Labs
The site identifies independent testing by SafeCert, HPLC and LC-MS, and U.S. manufacturing. No public exact-lot COA on a product page was verified.


9 vendors list Thymulin. The most-sold size is 10 mg, priced from $28.80 to $65.00 a vial across 5 vendors with an exact in-stock price. The median is $59.00. Last read Oct 11, 2026.
A thymus peptide studied for immune balance and calming inflammation.
Card one came out on top. It is also a partner, so we earn a commission there. One of the other two cards is a store we partner with, and we earn a commission from it. The other is the next store in the sort, and we earn nothing from it.
Our pickThe site identifies independent testing by SafeCert, HPLC and LC-MS, and U.S. manufacturing. No public exact-lot COA on a product page was verified.
Partner
Runner-upThe public site could not be audited fully because access was blocked, gated, unavailable, not parseable, or the business/site reports closure.
Every figure here is reconstructible from the full table below. Links noted "We earn from this link" carry a sponsored tag; a commission never changes a card's position, and a partner that wins the rule stays in first place. Prices exclude shipping and were read on the dates shown.
| Vendor | Size | Price | Per mg | Availability | Checked | Link |
|---|---|---|---|---|---|---|
| Real Peptides Thymulin | 10 mg | $28.80$57.60Sale price, list price not shown | $2.88 | in stock | Oct 10, 2026 | View° |
| Simple Peptide Thymulin | 20 mg | $84.00 | $4.20 | in stock | Oct 11, 2026 | View |
| BioEdge Research Labs Thymulin | 10 mg | $45.00 | $4.50 | in stock | Sep 28, 2026 | View |
| Skye Peptides Thymulin (CAS: 63958-90-7) 10 mg | 10 mg | $59.00 | $5.90 | in stock | Oct 10, 2026 | View |
| BioLongevity Labs Thymulin Peptide (10mg) | 10 mg | $64.97 | $6.50 | in stock | Oct 10, 2026 | View° |
| Oath Research Thymulin | 10 mg | $65.00 | $6.50 | in stock | Oct 10, 2026 | View |
| Oath Research Thymulin | 5 mg | $45.00 | $9.00 | out of stock | Oct 10, 2026 | View |
| Limitless Life Nootropics Thymulin 10mg | 10 mg | $19.99starting at | out of stock | Oct 10, 2026 | View° | |
| TrueLab Peptides Thymulin | 10 mg | $37.00starting atStarting price, larger sizes cost more | in stock | Oct 10, 2026 | View | |
| Xcel Peptides Thymulin | not stated | $45.00$79.00 | in stock | Oct 10, 2026 | View |
We earn from these links. It never changes a price or a position here.
Names its testing lab: Freedom Diagnostics and Kovera (named on its capsule product pages).
Coverage record →Does not name a testing lab on this product's page.
Coverage record →Does not name a testing lab on this product's page.
Coverage record →Does not name a testing lab on this product's page.
Coverage record →Does not name a testing lab on this product's page.
Coverage record →Does not name a testing lab on this product's page.
Coverage record →Does not name a testing lab on this product's page.
Coverage record →Names its testing lab: not named; batch COA linked on each product.
Coverage record →Does not name a testing lab on this product's page.
Coverage record →Every per mg number here divides the price by the milligrams printed on the vial. Testing labs regularly find vials that weigh less than the label says.
Shipping is often flat, so it hurts small orders most. Several vendors add a card fee and discount for crypto. Two offers a dollar apart can swap places at checkout.
A bigger vial costs less per mg and expires on the same schedule. Once mixed, most people work to about 28 days in the fridge, so the saving only counts if you finish it.
Ignoring the few freak listings at each extreme, the dear end of the Thymulin market costs 3.1 times what the cheap end does, per milligram.
Half these listings charge more than this per mg and half charge less. It moves with sales, which is why every row carries a date.
Enough coverage to show a real range. Anything under three vendors stays off the hub.


Vendors on this page sell Thymulin labeled for laboratory research only. That label is the legal reason they are allowed to sell it at all.
Full Thymulin record →There is no pharmacist behind it, no dispensing record, and nobody on the hook for what is inside. The lab report is the whole quality system, which is why it sits next to the price here.
Research use only is a claim the seller has to keep making. A vendor that adds dosing instructions, health claims, or personal-use wording has stepped outside the framework it relies on, and that says something about the seller.
What customs and carriers do varies by state and by shipper. This describes how these products are sold and is not legal advice.

Freeze-dried powder keeps for a long time in the freezer and for months in the fridge. Once liquid goes in, most people work to about 28 days in the fridge, away from light.

What arrives is powder in a sealed vial. Water goes down the inside wall rather than onto the powder, and the vial is swirled instead of shaken. Neither the water nor the syringes are in the prices above.

A larger Thymulin vial costs less per mg and expires on the same schedule once mixed. The saving is real only when the vial runs out inside that window.
Nothing on this page tells you what to take. Full walkthroughs live in the guides.
Rows sort on one number. There is no combined score and no weighting, so no vendor can be pushed up the table by a rating you cannot check.
Vendors that publish nothing stay in the table, marked. Taking them out would make the market look tidier than we found it.
Prices are read off public catalog pages and saved with the date. If a check runs late the row says so instead of showing an old price as current.
Commissioned links are marked on the row and listed on the disclosure page. They never move a listing up or down the table.
Prices on this site are read from vendor websites on the dates shown. A starting tag means the vendor publishes only a from price for that product. A wall means the vendor hides prices behind a login, and we publish that fact rather than hide the gap.
We report prices and never rate or score an offer. There is no value grade, no ranking of vendors by our opinion. A row carries its size, its price, its price per milligram, and any plain fact about the listing worth knowing.
When a vendor's site disappears, its rows stay in the tables as a dated record, drop out of every count, price range and ranking, and lose their links. Ninety days after a vendor's site disappears, its rows leave these tables and remain in our records.
Some vendors pay this site a commission when you buy through our links. Every one of those links is marked, and every vendor with that arrangement is labeled on the vendor page. Commissions never change the prices we show, the order of any table, a vendor's badge, or anything in the audit record. The data is collected the same way for every vendor, paid or not.
We accept no payment for coverage, placement, or ratings. Warning letters come from fda.gov. If a paying vendor earns a bad mark, the mark stays.
The most-sold size, 10 mg, runs $28.80 to $65.00 a vial across 5 vendors, with a median of $59.00. Across 9 vendors it typically runs $2.88 to $9.00 per milligram, with the cheapest sticker price at $19.99. Prices exclude shipping, card fees, and bacteriostatic water.
Vial size, sale cycles, payment method discounts, and how much testing evidence a seller publishes all move the number. A cheap milligram is only cheap if the vial holds what the label claims, which no price column can tell you.
Sorting never reads whether a vendor pays us. Any commissioned link is marked on the row and listed on the disclosure page, and it never changes where a listing lands in the table.
Thymulin is sold labeled for laboratory research only. That label is the legal basis vendors rely on, and it means nobody stands behind the vial the way a pharmacy would.
Every price is read off a public catalog page and stored with its date; this compound was last read Oct 11, 2026. Nothing is overwritten, so a stale row says so rather than pretending to be current.