Buying Guide·7 min read

Buy MOTS-C: Compare 6 Vendors, From $42

Compare 6 MOTS-C vendors side by side: from $42 a vial, best value $2.88/mg. Codes save up to 50%. Vial sizes, COA status, real cost per week.

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Where to Buy MOTS-c

MOTS-c is one of only a handful of mitochondrial-derived peptides in active research use — encoded within the mitochondrial 12S rRNA gene and released under metabolic stress to activate AMPK and restore mitochondrial function. That pedigree makes it a favorite of the longevity community, but it also makes vendor selection tricky: MOTS-c is expensive to synthesize correctly, and the price spread between a well-tested 10mg vial and a sketchy one is the difference between biology and saline.

This guide covers what to pay per milligram, why the 10mg vial dominates, what a real COA for a 16-residue peptide looks like, and how to judge which vendors are worth your order in 2026.

This is not a ranked vendor list — for that, see our Best MOTS-c Vendors comparison. This guide teaches you how to evaluate any vendor yourself.

Understanding MOTS-c Pricing

MOTS-c ships as a lyophilized powder in sealed glass vials, most commonly 5mg or 10mg. Three factors move price: vial size (bigger is cheaper per mg), vendor overhead on third-party testing, and synthesis difficulty relative to simpler peptides like BPC-157. At live prices, 10mg MOTS-c vials overlap BPC-157's per-mg range at the low end and run higher at the top end.

Current Market Pricing (2026)

Vial size Lowest price today (with code) Vendor Also sold by (price today)
10mg $31.00 ($3.10/mg) Ascension Peptides Nura Peptide $31.50 · Mile High Compounds $44.99 · EZ Peptides $48.60 · Swiss Chems $62.96

Prices are single vials through our links, with each vendor's standing code or link discount applied.

The pattern is clear: 10mg is the default purchase. Stepping to 20mg usually lowers the per-mg price; at 5-10 mg/week a 20mg vial lasts 14-28 days, inside the 28-day reconstituted stability window (see the table below).

Single-vial option: 50% off sitewide through our link puts Ascension Peptides' 10mg MOTS-c vial at $31.00 ($3.10/mg) today. Get the deal →

Cost Per Week at Common Doses

At Ascension Peptides today, with its link discount, the 10mg vial is $31.00; monthly cost is the 10mg vial count below times that price.

Weekly Dose 5mg vials per month 10mg vials per month 10mg vs 5mg
5 mg/week (beginner) About 4 About 2 Half as many vials
10 mg/week (standard) About 8 About 4 Half as many vials
15 mg/week (high-dose) About 12 About 6 Half as many vials

For current vendor-specific pricing with exact $/mg breakdowns, see our Best MOTS-c Vendors comparison.

How to Verify MOTS-c Quality

COA verification process

MOTS-c is a 16-amino-acid mitochondrial-derived peptide with a molecular weight of approximately 2,174.5 Da and the sequence Met-Arg-Trp-Gln-Glu-Met-Gly-Tyr-Ile-Phe-Tyr-Pro-Arg-Lys-Leu-Arg. It's harder to synthesize cleanly than smaller peptides — the two methionines and two tyrosines create oxidation risks — which is exactly why COA scrutiny matters more here than on simpler compounds.

What a COA (Certificate of Analysis) Should Include

Identity Confirmation

  • Mass spectrometry confirming correct molecular weight (~2,174.5 Da for MOTS-c)
  • Amino acid sequence verification matching MRWQEMGYIFYPRKLR

Purity Testing

  • HPLC purity — look for 98%+ purity
  • HPLC chromatogram should show a single dominant peak with minimal oxidation peaks

Contamination Testing

  • Endotoxin levels (bacterial contamination)
  • Residual solvent analysis (acetonitrile, TFA)
  • Heavy metals screening

How to Verify a COA Is Legitimate

  1. Check the testing lab — Reputable labs include Janoshik Analytical, MZ Biolabs, and Colmaric Analyticals. "In-house" testing alone is a red flag.
  2. Verify on the lab's website — Janoshik COAs carry a task number verifiable at janoshik.com. No verifiable number means no trust.
  3. Check the date — COAs should be within 6 months. Stale COAs may not reflect current batches.
  4. Match the batch — The lot number on the COA must match what's printed on your vial.
  5. Look for the full PDF — Screenshots are trivially faked; demand the lab-letterhead PDF.

Red Flags to Avoid

  • No COA available — non-negotiable for a peptide this hard to make correctly
  • Only in-house testing — self-reported numbers from a vendor running a complex synthesis are meaningless
  • Prices significantly below market — MOTS-c priced far below the live range on our price comparison is a quality concern
  • No contact information — legitimate vendors have real customer service
  • Cryptocurrency only — good vendors accept crypto but also have card/ACH/Zelle rails
  • No return or reship policy — reputable vendors stand behind their product
CategoryLongevity & Mitochondrial Peptides
Classmitochondrial
GoalLongevity
Mots C research kit
Best Kit Deal10-VialCOASave 36%

Ion Peptide — 40mg × 10 (400mg) — $863 $733 with code thepeptidecatalog (15% off) ($1.83/mg)

Top MOTS-C Vendors

Ranked by price, COA availability, and reputation

1
Nura PeptideCOA
10/10
10mg$4.50/mg
2
Ascension PeptidesCOA
9.8/10
10mg$6.20/mg
3
Ion PeptideCOA
9.6/10
40mg$2.88/mg
See full vendor rankings for MOTS-C →

Choosing the Right Vial Size

Vial size comparison

Vial size selection is a tradeoff between per-mg cost and the reconstituted stability window.

The 28-Day Rule

Once mixed with bacteriostatic water, MOTS-c is stable for up to 28 days refrigerated. Sterile water (no preservative) drops this to ~24 hours. That creates a simple rule: don't reconstitute more than you can use in 28 days, and refrigerate everything.

Vial Size At 5 mg/week At 10 mg/week At 15 mg/week
5 mg 7 days 3.5 days 2.3 days
10 mg 14 days 7 days 4.7 days
20 mg 28 days 14 days 9.3 days

All standard protocols fit inside the 28-day window — MOTS-c is one of the easier peptides to plan around because a 10mg vial lasts exactly one week at the standard dose.

Reported setup: Community sources describe reconstituting a fresh 10mg vial weekly and drawing from it 2-3x/week.

Tolerance testing or half-dose (5 mg/week range):

  • Start with a 5mg vial — low upfront cost and covers a full week at beginner doses.

Standard longevity protocol (10 mg/week):

  • 10mg vial — lasts exactly one week at 10 mg/week, the cleanest logistics for the cost.

High-dose or stack protocols (15+ mg/week):

  • 20mg vial (when available) or 2× 10mg per week — pair with SS-31 for a full mitochondrial stack.

Buying Multiple Smaller vs One Large Vial

Factor Multiple Small (e.g., 4× 10mg) One Large (1× 20mg biweekly)
Cost per mg Higher Lower
Freshness Better (reconstitute each week) Risk of mid-cycle degradation
Flexibility Can stop anytime Committed to two-week cycles
Storage Easier Requires careful planning
Shipping Can batch order monthly Less frequent orders

What the sizes offer: 10mg vials reconstituted weekly are the most-cited MOTS-c setup. The 20mg size usually costs less per mg and lasts 14-28 days at 5-10 mg/week, which matters most for year-round protocols.

Vendor Evaluation Methodology

When comparing MOTS-c vendors, we weight three factors.

Price Competitiveness (40%)

We normalize to cost per milligram across vial sizes. A vendor selling 10mg at $80 ($8/mg) beats one selling 5mg at $55 ($11/mg), all else equal.

COA & Testing (30%)

We check that COAs are from recognized third-party labs, recent (≤6 months), verifiable on the lab's website, and cover identity, purity, and contamination. MOTS-c's synthesis difficulty means this criterion carries extra weight in practice.

Reputation (30%)

Peptide-forum feedback, shipping reliability, customer-service responsiveness, and multi-year operating history. Batch-recall history counts against a vendor even when the underlying issue was resolved.

Shipping and Storage

What to Expect When Your Order Arrives

Lyophilized MOTS-c arrives as a white or off-white powder cake in a sealed glass vial. Check:

  • Vial integrity — no cracks, rubber stopper seated, aluminum cap intact
  • Powder appearance — solid cake or loose powder, NOT liquid or discolored yellow/brown (oxidation)
  • Labeling — batch/lot, milligram content, "for research use only"
  • Cold pack — reputable vendors ship with cold packs in warm months

Storage Guidelines

State Temperature Duration
Lyophilized (powder) Room temp Weeks (shipping only)
Lyophilized (powder) Refrigerated (2-8°C) 12-24 months
Lyophilized (powder) Frozen (-20°C) 2+ years
Reconstituted (BAC water) Refrigerated (2-8°C) 28 days max
Reconstituted (sterile water) Refrigerated (2-8°C) 24 hours

Key point: MOTS-c's two methionines are oxidation-sensitive. Keep unreconstituted vials refrigerated (freeze for long-term), and mix only what you'll use within 28 days. See our MOTS-c reconstitution guide for step-by-step mixing.

Bacteriostatic water vial — 0.9% benzyl alcohol multi-dose
Bac Water Made for Peptides
Don't risk a $300 peptide on generic bac water.
Most cloudy reconstitutions trace back to one thing — and it isn't the peptide. Sterile, non-pyrogenic, 0.9% benzyl alcohol — formulated for peptide reconstitution, not repackaged from generic stock.
✓ 0.9% benzyl alcohol✓ Made for peptides✓ 30 mL multi-dose
Shop bac water made for peptides

Frequently Asked Questions

Is MOTS-c legal to buy?
MOTS-c is sold as a research chemical for laboratory use, and legal status for purchasing research chemicals varies by jurisdiction. It is not FDA-approved, and vendors label product 'not for human consumption.' It is on WADA's banned list for competitive athletes, so tested-sport athletes should not use it.
How much does MOTS-c cost per month?
At the standard 10 mg/week community protocol (split 2-3x/week), monthly mass is about 40mg. A single 10mg vial covers exactly one week at that dose, so most users buy 4 vials per month. Live per-vial prices are on the Best MOTS-c Vendors page. 5mg vials cost more per mg, which is why 10mg is the default.
What vial size should I buy — 5mg or 10mg?
For a standard 10 mg/week protocol, the 10mg vial is the clear winner: one vial per week, fresh reconstitution each time, and a lower cost per mg than a 5mg vial. 5mg vials only make sense for tolerance testing or if you're running half-doses. 20mg vials (when available) usually cost less per mg again.
What purity should I look for in MOTS-c?
Look for third-party HPLC testing showing 98%+ purity and mass spec confirming the 2,174.5 Da molecular weight (MOTS-c is a 16-amino-acid mitochondrial-derived peptide). Janoshik Analytical, MZ Biolabs, and Colmaric Analyticals are the labs whose COAs are worth verifying — in-house numbers alone don't count.
Can I buy MOTS-c from a pharmacy?
No. MOTS-c is not a compounded pharmaceutical and is not available from US compounding pharmacies. It is only accessible through research peptide vendors. Anyone claiming pharmacy-grade MOTS-c is misrepresenting the product.

References

Citation Topic PMID
Lee C, et al., Cell Metab (2015) MOTS-c discovery — mitochondrial-derived peptide regulating metabolism 25738459
Reynolds JC, et al., Nat Commun (2021) MOTS-c as an exercise-induced regulator of age-dependent physical decline and muscle homeostasis 33473109

This article is for educational and informational purposes only. It is not medical advice and should not be used to diagnose, treat, or prevent any condition. Consult a licensed healthcare provider before using any peptide.