TB-500 Dosage and Reconstitution Guide: 5 mg and 10 mg Vial Math, Cost, and Buyer Checks

Short Answer: Start With Identity, Then Do the Vial Math

Before comparing a TB-500 vial, verify three things: the exact peptide form, the concentration after reconstitution, and the delivered cost per verified milligram.

TB-500 usually means the acetylated thymosin beta-4 17-23 fragment, Ac-LKKTETQ. Some sellers use TB-500 and full-length thymosin beta-4 interchangeably, even though full-length Tβ4 is a 43-amino-acid peptide. Those products should not be treated as identical.

Current community and seller protocols commonly report a loading range of 4 to 6 mg total per week, often split into two administrations, followed by about 2 to 2.5 mg per week. These are reported protocols, not a clinically established human dose. Direct human dose evidence for injected TB-500 fragment remains limited.

Use /peptides/tb-500 for the compound overview, /prices/tb-500 for live vial offers, and /tools/reconstitution-calculator to turn your selected vial size and water volume into concentration and U-100 syringe math.

TB-500 vs Full-Length Thymosin Beta-4

The evidence follows the molecule. A study of full-length Tβ4 does not automatically establish the same result for the shorter TB-500 fragment.

The wound-healing figure most often quoted comes from PMID 10469335, a rat model using full-length Tβ4. Reepithelialization increased 42 percent at day 4 and by as much as 61 percent at day 7 versus saline, with greater wound contraction, collagen deposition, and angiogenesis. That is a strong preclinical signal for full-length Tβ4, not proof of injected TB-500 fragment efficacy in people.

NCT07487363 is more directly relevant because it studies the TB-500 17-23 fragment. The recruiting randomized Phase 1/2 trial plans to enroll 80 adults with stable ASCVD across three dose cohorts, using a 3:1 active-to-placebo allocation. It has no posted results, so it cannot validate the reported community protocols yet.

The label and COA should name the actual form. A useful lot-matched report supports identity, purity, and quantitative content. A high purity percentage alone does not prove that a vial contains the labeled 5 mg or 10 mg.

Reported Protocol Ranges and Weekly Vial Use

The commonly reported loading range is 4 to 6 mg per week, often split twice weekly. Reported maintenance amounts cluster around 2 to 2.5 mg per week. There is no clinically established standard human protocol, so treat these figures as market context rather than a personalized schedule.

• At 5 mg per week, one 5 mg vial represents one theoretical week and one 10 mg vial represents two theoretical weeks.
• At 2.5 mg per week, one 5 mg vial represents two theoretical weeks and one 10 mg vial represents four theoretical weeks.

Those estimates are before handling loss. They do not prescribe a cycle length or account for product-specific directions.

The Three Reconstitution Formulas

A 5 mg vial contains 5,000 mcg. A 10 mg vial contains 10,000 mcg. A U-100 syringe has 100 units per mL, so one unit equals 0.01 mL.

1. Concentration in mcg/mL = vial mcg ÷ final volume in mL.
2. Mcg per U-100 unit = mcg/mL ÷ 100.
3. Draw units = target mcg ÷ mcg per unit.

Water volume changes concentration and syringe units. It does not change the total peptide in the vial. Confirm vial capacity, product-specific diluent instructions, and syringe calibration before mixing.

5 mg and 10 mg Reconstitution Math

For a 5 mg vial:

• Add 1 mL for 5,000 mcg/mL and 50 mcg per U-100 unit.
• Add 2 mL for 2,500 mcg/mL and 25 mcg per unit.
• Add 2.5 mL for 2,000 mcg/mL and 20 mcg per unit.

For a 10 mg vial:

• Add 1 mL for 10,000 mcg/mL and 100 mcg per U-100 unit.
• Add 2 mL for 5,000 mcg/mL and 50 mcg per unit.
• Add 2.5 mL for 4,000 mcg/mL and 40 mcg per unit.
• Add 3 mL for about 3,333 mcg/mL and 33.33 mcg per unit.

As an arithmetic example, after adding 2 mL, a 1 mg amount equals 40 U-100 units from a 5 mg vial or 20 units from a 10 mg vial. These figures describe concentration, not a dose recommendation.

Use /tools/reconstitution-calculator for custom inputs. The full reference table at /blog/10mg-peptide-vial-reconstitution-chart is useful when comparing final volumes.

TB-500 Price Comparison: Current 10 mg Listings

PeptidePub’s August 30, 2026 catalog snapshot shows a wide spread in 10 mg sticker prices:

• Peptide Society: $29.99, about $3.00/mg
• Aero: $39.99, about $4.00/mg
• AMP: $48, or $4.80/mg
• EZ Peptides: $48, or $4.80/mg
• Valor: $49.99, about $5.00/mg
• Double R Labs: $54.99, about $5.50/mg
• Glacier: $58.99, about $5.90/mg
• Main Peptides: $59.99, about $6.00/mg
• Mile High: $59.99, about $6.00/mg
• Atomik: $65, or $6.50/mg
• Valkyrie: $75, or $7.50/mg
• Improved Peptides: $85, or $8.50/mg
• MD Innovative: $100, or $10.00/mg
• World Wide Peptides full-length TB-4: $329, or $32.90/mg

That creates an observed 10 mg range of $29.99 to $329, or about $3.00 to $32.90 per labeled mg. The high outlier is explicitly full-length TB-4, which is exactly why product form must be matched before price.

Five-milligram listings include Ascension at $54, Main Peptides at $44.99, MD Innovative at $60, Viper at $49.99, and World Wide Peptides full-length TB-4 at $175.

At a user-selected 5 mg weekly amount, a $29.99 10 mg vial represents about $15.00 per week in theoretical material cost. A $100 vial represents $50 per week. At 2.5 mg weekly, those figures fall to about $7.50 and $25 per week. This is cost arithmetic, not a schedule recommendation.

Use /tools/cost-per-dose only after the peptide form, lot evidence, and verified content are comparable. Then check live offers at /prices/tb-500 and current promotions at /deals. The useful metric is delivered cost per verified milligram.

COA, Vendor, Storage, and Competition Checks

A purchase-ready COA should answer three separate questions:

1. Identity: Does the result match TB-500 fragment, full-length Tβ4, or the exact blend on the label?
2. Purity: What percentage of the tested material is the target compound?
3. Quantitative content: How many milligrams are actually in the vial?

A 99 percent purity result does not establish a 5 mg or 10 mg fill. For a TB-500 and BPC-157 blend, the report should identify and quantify each component separately.

Before buying, check the named laboratory, report date, product-lot match, storage and shipping terms, current stock, delivered price, and active code. /blog/how-to-read-peptide-coa-before-you-buy explains the document checks, while /vendors makes seller evidence easier to compare.

Athletes also have a separate constraint. WADA lists thymosin beta-4 and its derivatives as prohibited. Anyone subject to testing should review the current official prohibited list.

The verified affiliate route /go/bodybuilding-health is available, but confirm the live product identity, vial size, lot evidence, price, shipping, and discount before purchasing.

FAQ

How much BAC water should go into a 5 mg TB-500 vial?

There is no universal volume. With a 5 mg vial, 1 mL produces 5,000 mcg/mL and 50 mcg per U-100 unit. Two mL produces 2,500 mcg/mL and 25 mcg per unit. A 2.5 mL final volume produces 2,000 mcg/mL and 20 mcg per unit. Follow the product-specific instructions and confirm vial capacity.

How many units is 1 mg after adding 2 mL?

In a 5 mg vial reconstituted to 2 mL, 1 mg equals 40 U-100 units. In a 10 mg vial at 2 mL, 1 mg equals 20 units. These are arithmetic examples, not dose recommendations.

Is TB-500 the same as thymosin beta-4?

No. TB-500 typically refers to the acetylated Ac-LKKTETQ 17-23 fragment. Thymosin beta-4 is the full-length 43-amino-acid peptide. Verify the exact molecule and make form-matched evidence and price comparisons.

How long does a 10 mg vial last?

At a user-selected 5 mg weekly amount, it represents two theoretical weeks. At 2.5 mg weekly, it represents four theoretical weeks. Both estimates are before handling loss.

What is the best-value TB-500 vial?

The strongest buy combines correct identity, lot-matched identity and purity results, quantitative content, credible vendor evidence, and the lowest delivered price. The cheapest current sticker price is not automatically the cheapest verified product.

Bottom Line

TB-500 buying starts with identity. The shorter Ac-LKKTETQ fragment and full-length thymosin beta-4 cannot be compared as if they were the same product, and evidence for one should not be silently assigned to the other.

1. Choose the final volume and calculate concentration at /tools/reconstitution-calculator.
2. Compare current price per milligram at /prices/tb-500.
3. Check lot-specific evidence and seller transparency at /vendors.
4. Add shipping, tax, likely handling loss, and current codes from /deals.
5. Choose the lowest delivered cost per verified milligram that meets your evidence standard.

That sequence prevents the two most expensive mistakes: paying a premium for a mislabeled form and treating a purity percentage as proof of vial fill. Compare the product, verify the COA, calculate the real cost, then choose the strongest verified value.