SS-31 Peptide Dosage: How Pepti Prescribes Elamipretide, in Units, mL and mg

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. SS-31 is supplied as a vial drawn with an insulin syringe; there is no Pen version and it is not part of any Pepti blend. These are the typical printed directions; your own directions are the ones on your vial.

Pepti's directions are written in two forms, 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.

The milligram figure comes from the concentration on the label. Pepti's SS-31 is supplied at 2 mg/mL, so:

That arithmetic is a way to read a label, not a way to set a dose. A vial labelled 10 mg is not a 10 mg dose: it is twenty 0.5 mg doses. 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 in more detail.

Dosing figures for SS-31 online mix milligrams, micrograms and units, and the numbers only line up if you know the concentration. The chart below is the conversion for a 2 mg/mL 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, and millilitres multiplied by 2 gives milligrams. A chart written for another concentration gives different milligrams for the same units, which is the main reason not to dose from a chart, including this one.

At Pepti's typical directions, one 10 mg vial lasts four weeks:

Four weeks is why refills run every 28 days, one vial per fill. 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 the vial in the fridge between doses, and follow the beyond-use date printed on the label, which runs from first puncture. 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 dose, follow your directions and do not take two doses to make up for one.

SS-31 has more human trial data than almost any other compounded peptide, and the trial dose is quoted online as if it were a protocol. It was a dose chosen for people with specific diseases:

The FDA-approved elamipretide product, granted accelerated approval in September 2025 for one rare genetic disease, Barth syndrome, in people weighing at least 30 kg, is an 80 mg/mL solution given as 40 mg once daily. Its label reduces the dose in severe kidney impairment, which is worth raising on your intake if it applies.

Two honest points follow. First, the randomised primary endpoints were missed in every one of those diseases; the positive findings are the open-label Barth syndrome results, a fatigue signal in the short myopathy crossover, a genotype subgroup and a secondary eye endpoint. Second, Pepti's typical 0.5 mg dose is one eightieth of 40 mg, prescribed for uses the trials did not test, and no study shows what that dose does in any population. That is why your directions come from a physician who has reviewed your intake, not from a trial table. The evidence, one claimed benefit at a time, is in SS-31 benefits.

The vial Pepti supplies is not the approved product. It is prepared by a PCAB-accredited, FDA-registered US 503A compounding pharmacy to an individual prescription, at a different concentration, as a multi-dose vial; the approved product's single-patient vial is discarded eight days after opening. Compounded medications are not FDA approved.

Since September 2025, elamipretide has been a component of an FDA-approved drug, which makes it eligible for 503A compounding without a bulks-list entry, subject to the FDA's "essentially a copy" rule. It is not on the FDA's Category 2 list and never has been. The full history is in what is SS-31.

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.

Elamipretide's safety record comes from the trials above, and it is consistent: injection-site reactions dominate.

Those trial rates were recorded at 40 mg daily, not at Pepti's compounded dose. Systemically, the trials report elamipretide as well tolerated across hundreds of people for up to a year and a small group for more than three years. That is not a safety database in healthy adults. SS-31 is not used in pregnancy or breastfeeding. Elamipretide is not named on the 2026 WADA Prohibited List, but a tested athlete should confirm with their anti-doping organisation and tell their physician before starting; see do peptides show up on a drug test.

SS-31 cannot be bought legitimately without a prescription. Sites selling it "for research use only" are not accountable for what is in the vial: identity, purity, sterility and concentration are untested, so even the concentration your units chart depends on is unknown. 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 SS-31 in every state except Oklahoma, plus DC Step by step: how to get SS-31 prescribed online. Where it sits alongside other options: peptides for energy and fatigue and MOTS-c benefits.