FORTIFY Blend Dosage: How Pepti Prescribes Thymosin Alpha-1, BPC-157, KPV and LL-37

The price is all-in, covering medication, physician review, refill management and shipping, with no separate membership fee. Pepti is cash-pay and does not bill insurance. Your own directions are the ones printed on your vial.

Pepti's directions are written in millilitres and units, because prescriptions are written in millilitres and insulin syringes are marked in units. On a U-100 insulin syringe, 1 unit is 0.01 mL, so 100 units is 1 mL and 25 units is 0.25 mL. A unit is a volume mark on the barrel, not a measure of how strong the medication is.

FORTIFY is four peptides dissolved together in one vial, so one draw carries all four. The milligrams per dose come from each component's concentration multiplied by 0.25 mL:

That arithmetic is a way to read a label, not a way to set a dose. A vial labelled 13 mg in total is not a 13 mg dose: it is twenty doses of 0.65 mg combined. If your label and your syringe seem to disagree, do not dose; message your care team. How long does a peptide vial last explains every number on a vial label.

Fixed proportions

The four peptides are in a ratio fixed by the pharmacy's formulation. Thymosin alpha-1 and BPC-157 are 5 mg each of the 13 mg in the vial, KPV is 2 mg and LL-37 is 1 mg. Every dose delivers the same split, and there is no way to take more of one and less of another from the same vial. If a different balance is wanted, the components are prescribed separately.

The chart below is the conversion for the FORTIFY vial, drawn with a U-100 insulin syringe. It is math only. It is not a menu of doses, and the only line that applies to you is the one that matches the number printed on your vial.

The rule behind every row: units divided by 100 gives millilitres; multiply millilitres by 1 for thymosin alpha-1 and BPC-157, by 0.4 for KPV and by 0.2 for LL-37. Those multipliers only hold for this vial. A chart written for a different blend or a different concentration gives different milligram figures for the same units, which is the main reason not to dose from a chart, including this one.

People often compare a FORTIFY dose with thymosin alpha-1, KPV or BPC-157 prescribed on their own, or with the ELEVATE blend, which shares the BPC-157 and KPV base. The draw looks similar, but what it delivers is different:

What the numbers show

Three things stand out. First, FORTIFY delivers half the thymosin alpha-1 per dose that thymosin alpha-1 on its own does (0.25 mg against 0.5 mg), because its vial holds 5 mg rather than 10 mg. Second, FORTIFY's KPV is a small share: 0.1 mg per dose, against 0.5 mg in KPV on its own or in ELEVATE. Third, LL-37 is the smallest component of all, at 0.05 mg per dose, and it is not prescribed by Pepti on its own; FORTIFY is the only Pepti product that contains it.

So FORTIFY is not a stronger version of any single peptide. It is a lower dose of each of four components in one injection. If immune modulation alone is the goal, the single thymosin alpha-1 product carries more of it, and it is also available as a pen. What is thymosin alpha-1 and what is KPV cover the single products.

Once daily, Monday through Friday

Pepti's FORTIFY directions say once daily, Monday through Friday, with weekends off. The weekend break is part of the schedule, not two missed doses. Twenty doses at five a week is four working weeks, which is why refills run on a 28-day cycle. The directions do not name a time of day; if yours do, follow the label.

Under the skin, and where

Subcutaneous means into the fat layer, not the muscle. Abdomen and thigh are the usual sites, rotated so the same spot is not used repeatedly. The mechanisms described for FORTIFY's components are systemic, so there is no "inject near the problem" logic; the site is a matter of comfort and rotation. Technique is covered in how to inject peptides safely.

Vials are multi-dose solutions shipped ready to use, refrigerated with ice packs, with sterile syringes and alcohol prep pads. Nothing is mixed at home. Keep it in the fridge and follow the beyond-use date on the label; a four-peptide vial is not something to keep past it. Cloudiness, particles or a change from what you received is a reason to message rather than inject. One vial per fill, every 28 days. How to store peptides covers storage.

If a vial runs short before the refill, message your care team rather than adjusting anything yourself. If you miss a weekday dose, follow your directions and do not take two doses to make up for one.

FORTIFY has never been studied as a blend, in people or in animals, so there is no trial dose for it. The evidence is per component, and none of it is a dose study of this four-peptide injection. Thymosin alpha-1 has randomised human trials, but in sick populations such as chronic hepatitis B and sepsis, using the single peptide. BPC-157's human work is early-phase, for inflammatory bowel indications. KPV has no human trials of any kind. LL-37's human trials were of topical application to leg ulcers, not injection. The directions on the vial are a prescribing standard set to deliver one vial in four weeks. What each component has been studied for is set out in FORTIFY Blend benefits and what is FORTIFY Blend.

Your physician sets your directions after reviewing your intake. Things that can lead to different directions, or a different product, include:

When directions change, the new numbers are printed on the new label. Never carry a number over from a previous fill. Bloodwork is not required for any Pepti treatment. If your physician wants labs for your care, they'll ask through your account.

The full list, with which component each effect is attributed to, is in FORTIFY Blend side effects. Tested athletes should know that BPC-157 is named on the WADA Prohibited List, prohibited at all times, and that a prescription does not change that; see is BPC-157 banned.

FORTIFY is a compounded prescription; compounded medications are not FDA approved. BPC-157 and KPV were recommended for the 503A Bulks List by the FDA's advisory committee in July 2026, with the final determination pending; LL-37 is scheduled for review before the end of February 2027; and the committee voted against thymosin alpha-1 in December 2024, a recommendation the FDA has not acted on. All four remain legal to prescribe.

FORTIFY cannot be bought legitimately without a prescription. Sites selling four-peptide immune blends "for research use only" are not accountable for what is in the vial: identity, purity, sterility and concentration are untested, so the per-dose figures above would not hold. The distinction is set out in research peptides vs prescription peptides. The prescription route:

1. Complete a free online intake covering your history, medications and what you want help with.
2. A physician licensed in your state reviews it, usually within 24 hours.
3. If it is appropriate, a PCAB-accredited, FDA-registered US 503A compounding pharmacy prepares it to that prescription. Lot test results are published at /quality/lab-results.
4. It ships refrigerated with your directions printed on the vial.
5. Your physician stays reachable for questions and dose changes.

Pepti prescribes FORTIFY in every state except Oklahoma, plus DC The step-by-step page for its best-studied component is how to get thymosin alpha-1 prescribed online, and the wider picture is in peptides for immune support.