Choosing the Right Vial Size
The 28-Day Stability Rule
Ipamorelin reconstituted with bacteriostatic water and refrigerated is documented stable for roughly 28 days in published peptide-stability data. With sterile water (no preservative), the window collapses to ~24 hours.
2mg
20 days
10 days
~7 days
~3 days
5mg
50 days ⚠️
25 days
~17 days
~8 days
10mg
100 days ⚠️
~33 days ⚠️
⚠️ = exceeds 28-day reconstitution stability window
Practical implication: A 10mg vial at 200mcg/day exceeds the 28-day window if reconstituted all at once. Common practice is staged reconstitution — pull from sealed lyophilized vial as needed, mixing only the volume needed for ~28 days at the user's specific daily dose.
Vial Size by Protocol
Tolerance testing context:
A 2mg or 5mg vial is the smallest unit for assessing tolerance before larger purchase
1-2 weeks at 200mcg/day
Standard 200-300mcg/day community protocol:
10mg vial — most-cited size for cost efficiency
Reconstituted in stages or used at higher daily doses to fit the 28-day window
1-3 vials per typical 8-12 week cycle
Higher-frequency 3×/day pulse-mimetic protocol:
10mg vial at 200mcg × 3 doses/day = 600mcg/day = ~17 days per vial
Fits inside the stability window cleanly
Kit pricing meaningful for cycles 12+ weeks
Buying Multiple Smaller vs Kit
Cost per mg
Higher ($4-8/mg)
Lower ($3.60-6.80/mg)
Freshness
Same (lyophilized storage equivalent)
Same
Flexibility
Can stop mid-cycle
Committed to full kit
Storage
Easier (smaller volumes)
Requires fridge space
Shipping
More frequent orders
Single shipment
Why Ipamorelin Costs More Than GHRP-2 or GHRP-6
A common question: ipamorelin runs $4-8/mg while GHRP-2 sits at $2-4/mg and GHRP-6 is $1.50-3/mg. Two reasons:
1. Synthesis is harder. Ipamorelin contains two non-standard amino acids (Aib and D-2-Nal) that require specialized peptide chemistry. GHRP-2 and GHRP-6 use simpler residues.
2. Selectivity is the value. Trial data documented ipamorelin as the first selective growth hormone secretagogue — meaningfully clean of cortisol, prolactin, and aldosterone elevations at GH-active doses. GHRP-2 and GHRP-6 elevate cortisol and prolactin at higher doses. For users where cortisol matters (sleep quality, body composition during cuts), the selectivity is worth the per-mg premium.
When ipamorelin is paid for but mass spec shows ~817 Da (GHRP-2's molecular weight) or ~872 Da (GHRP-6), the buyer paid 2-3x for a less-selective peptide. The COA is what surfaces this.
Vendor Evaluation Methodology
When comparing ipamorelin vendors:
Price Competitiveness (40%)
Normalize to cost per milligram. A vendor selling 10mg at $50 ($5/mg) scores higher than one selling 5mg at $35 ($7/mg), all else equal.
COA & Testing (30%)
Third-party labs (Janoshik, MZ Biolabs, Colmaric)
Recent (within 6 months)
Verifiable task number
Mass spec confirming 711.85 Da
Reputation (30%)
Community feedback, shipping reliability, customer service, multi-year track record.
Shipping and Storage
Order Arrival
Lyophilized ipamorelin arrives as a white or off-white powder cake:
Vial integrity — no cracks, intact rubber seal, aluminum cap secure
Powder appearance — solid cake or loose powder, NOT liquid or discolored
Labeling — batch/lot, mg content, "for research use only"
Cold pack — most reputable vendors include cold packs in summer
Storage Guidelines
Lyophilized (powder)
Room temp
Days only (shipping)
Refrigerated (2-8°C)
12+ months
Frozen (-20°C)
24+ months
Reconstituted (BAC water)
~28 days
Reconstituted (sterile water)
~24 hours
Reconstituted
Frozen
Not generally recommended
See the ipamorelin reconstitution guide for documented mixing procedures.
Where to Buy
Ascension Peptides
Lowest effective pricing in the market after an exclusive 50% off through our link. Independent COA testing across the catalog.
Ion Peptide
Strong blend lineup and competitive singles pricing. Pre-mixed combinations simplify reconstitution and dosing.
EZ Peptides
Broadest verified catalog with QR-linked COAs on every product. Fast domestic shipping and a 30-day guarantee.
Glacier Aminos
Research peptide vendor with COA documentation and an exclusive 10% off discount.
Nura Peptide
Niche-format vendor — oral capsule peptides, pre-mixed nasal solutions, and a rare Reta + Cagrilintide combo blend, all 25% off with code thepeptidecatalog.
Mile High Compounds
Partner vendor with verified inventory and COA documentation.
Swiss Chems
Broad catalog with international shipping — useful for researchers outside the US.
Ascension Peptides
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50% off
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Ion Peptide
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15% off
EZ Peptides
10% off
Glacier Aminos
Nura Peptide
25% off
Mile High Compounds
Swiss Chems