Peptide Decoding
Ac-SDKP (TB-500 Fragment 1-4) vial, mock product photograph
Mock-up, not a real vendor product
Price transparency

Ac-SDKP (TB-500 Fragment 1-4) prices_

also sold as Ac-SDKP, goralatide, seraspenide, thymosin beta-4 (1-4)

1 vendor list Ac-SDKP (TB-500 Fragment 1-4). Too few publish a comparable price to give a range. Last read Oct 10, 2026.

The first four amino acids of TB-500, and a drug candidate in its own right.

Research onlyHealing and recovery2 listings
1vendor carries Ac-SDKP (TB-500 Fragment 1-4) right now, and publishes its price. Under three and we do not publish a range.
—is the middle of the pack per mg. Half the listings sit above it, half below.
0listings hide the price behind an account. We record them rather than guess.
1 vendor carries itand publishes its pricelast read Oct 10, 2026
02

Every offer, by form

None of these listings is a vial, so each form is shown in its own section and none is priced per milligram.

Capsules and tablets

Priced per bottle. The size shown is what the listing states, usually one capsule or tablet, so a price per milligram would not compare with a vial.

VendorSizePricePer mgAvailabilityCheckedLink
Xcel PeptidesThymosin Beta-4 Fragment (1-4) (Ac-SDKP) 1,000mcg - Capsules1000 mcg$169.00—in stockOct 10, 2026View
Xcel PeptidesThymosin Beta-4 Fragment (1-4) (Ac-SDKP) 1000mcg CapsulesNot stated$169.00—in stockOct 10, 2026View
03

Vendor by vendor

What each site was showing when we read it, and how it prices against the rest.
Vendor$169.00 listed
Xcel Peptides
2 listings · read Oct 10, 2026

Does not name a testing lab on this product's page.

Coverage record →
04

Three things the price does not tell you

A cheap sticker price only counts if the package is right.
Labeled amount

The label is a claim, not a measurement

The amount printed on the pack is the vendor's claim, not a lab measurement. Compare offers by what each label states before judging value.

Landed cost

Shipping and card fees are not in these numbers

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.

Package size

Bigger packages look cheaper and expire just as fast

Compare capsules and tablets by the amount per unit and the count per pack. A larger package only saves money if you can use it within the product's labeled shelf life.

A row of Ac-SDKP (TB-500 Fragment 1-4) research vials, mock product photograph
Same peptide, 1 vendorNothing on the glass tells you which seller will show you a lab report you can open, or what a milligram actually costs. That is what the table above is for.
06

What you are actually buying

Regulatory status changes what a price means.
Ac-SDKP (TB-500 Fragment 1-4) vial, mock product photograph
Regulatory status

Research only

Not approved anywhere. The name it was developed under is goralatide, also called seraspenide, and it went into clinical work as a chemoprotectant, meant to hold bone marrow stem cells in a resting state so chemotherapy would spare them. That program did not produce an approved product. The antifibrotic work that vendor pages describe is animal research in heart, kidney, lung and liver, and none of it is human efficacy data. Banned in drug-tested sport as part of the thymosin beta-4 class.

Full Ac-SDKP (TB-500 Fragment 1-4) record →
What that changes

Nobody stands behind a research product

There is no pharmacist behind it, no dispensing record, and nobody on the hook for what is inside the pack. 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.

07

Before the pack arrives

The tracked offer is for capsules, not a vial.
Ac-SDKP (TB-500 Fragment 1-4), mock product photograph
Storage

Follow the pack's storage directions

Check the capsule pack's label for storage and use-by information. A freeze-dried vial's freezer and post-mixing timeline does not describe this listing.

Ac-SDKP (TB-500 Fragment 1-4), mock product photograph
Preparation

No vial to mix

The tracked product is sold as capsules. Bacteriostatic water, syringes and reconstitution instructions are not part of this offer.

Ac-SDKP (TB-500 Fragment 1-4), mock product photograph
Pack economics

Check the count and amount per capsule

Compare the stated amount in each capsule and the number of capsules in the pack against its total price. A vial-size or per-milligram powder comparison would misrepresent this format.

Nothing on this page tells you what to take. Full walkthroughs live in the guides.

08

How this table is built

What decides the order of the rows, and who gets to be in them.
Ordering

Cheapest per mg first, and nothing else

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.

Inclusion

Doing badly does not get a vendor removed

Vendors that publish nothing stay in the table, marked. Taking them out would make the market look tidier than we found it.

Prices

Every price has a date on 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.

Money

Sorting never reads who pays us

Commissioned links are marked on the row and listed on the disclosure page. They never move a listing up or down the table.

How these prices are collected

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.

How this site makes money

09

Questions about buying ac-sdkp (tb-500 fragment 1-4)

Cost, sizes, and how this table works.
How much does Ac-SDKP (TB-500 Fragment 1-4) cost?+

We track 2 listings across 1 vendor, which is too few to publish a reliable per milligram range. The table above shows every price we have read.

Why is the same product so much cheaper at one vendor?+

Package size, sale cycles, payment method discounts, and how much testing evidence a seller publishes all move the number. A cheap price is only cheap if the product holds what the label claims, which no price column can tell you.

Do you make money if I buy?+

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.

Is ac-sdkp (tb-500 fragment 1-4) legal to buy?+

Not approved anywhere. The name it was developed under is goralatide, also called seraspenide, and it went into clinical work as a chemoprotectant, meant to hold bone marrow stem cells in a resting state so chemotherapy would spare them. That program did not produce an approved product. The antifibrotic work that vendor pages describe is animal research in heart, kidney, lung and liver, and none of it is human efficacy data. Banned in drug-tested sport as part of the thymosin beta-4 class.

How current are these prices?+

Every price is read off a public catalog page and stored with its date; this compound was last read Oct 10, 2026. Nothing is overwritten, so a stale row says so rather than pretending to be current.

10

Other healing and recovery compounds with price data

Same catalog sweep, same read dates.