Which vendors sell DSIP with independent COA testing?

36 vendors in the Merit Verified directory have independent COA evidence on file for DSIP — 125 COAs total. COA coverage and test dates are listed on the DSIP page at https://meritverified.org/peptides/dsip.

How do I verify the quality of DSIP from a vendor?

To verify DSIP quality, look for an independent certificate of analysis (COA) from a third-party lab — not a lab the vendor owns or pays directly. The COA should state the tested compound, lot number, purity percentage (identity and concentration), and the lab's name. Cross-reference the lot number against the vendor's current stock. Merit Verified indexes COAs for DSIP at https://meritverified.org/peptides/dsip so you can compare evidence across vendors before buying.

What is the regulatory status of DSIP?

DSIP is tracked in the Merit Verified registry. Regulatory status for research peptides in the US has been evolving — the FDA has reclassified a number of peptides out of the 503A compounding ingredient list since 2025. Merit Verified does not provide legal or regulatory advice; check official FDA sources or consult a licensed professional for the current status of DSIP in your jurisdiction.

Nootropic / Cognitive

DSIP

Also known as: Delta Sleep-Inducing Peptide

DSIP is a nonapeptide (Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu) isolated in 1977 from the cerebral blood of rabbits during electrically induced sleep. Mechanism remains uncertain and the clinical evidence base is weak. Not FDA-approved — research use only.

Where to buy · live market data

Who's worth your money for DSIP

Every current seller, ranked by independent evidence — Merit Score, latest COA purity, and live $/mg (size-normalized). Prices refresh daily. Rankings are never paid.

Top Merit pick

🇺🇸 Glacier Aminos 99

Highest Merit Score (99) of 34 scored sellers

$6.00/mg

$59.99 · 10mg · 99.2% purity

5 COAs

Buy code MERIT · 10% off

Best value

🇨🇳 Qing Li Peptide 60

Lowest $/mg among scored sellers

$0.00/mg

— · 5mg · 99.7% purity

1 COA

Buy

Most tested

🇺🇸 Verified Peptides 87

15 independent COAs on file

$2.94/mg

$29.40 · 10mg · 99.1% purity

15 COAs

Buy

Average price

$6.37/mg

range $0.00–$28.00/mg

Sellers

from $0.45

45-day trend

-1.7%

vs 45-day avg $/mg

66 of 77 sellers have a current price· 23 stale hidden· 9 unverified hidden

	Vendor	Price	$/mg	vs avg	Purity	COAs	Merit
🇺🇸	Glacier Aminos ✓ verified at source · just now	$59.99· 10mg	$6.00/mg	-5.9%	99.2%	5	99	Buy code MERIT · 10% off
🇺🇸	Hydro Research Peptides ✓ verified at source · just now	$0.45· 5mg	$0.09/mg	-98.6%	99.9%	4	97	Buy code MERIT · 15% off
🇺🇸	Moglabs ✓ verified at source · just now	$28.00· 5mg	$5.60/mg	-12.2%	99.1%	2	96	Buy
🇺🇸	BioLongevity Labs ✓ verified at source · just now	$55.97· 5mg	$11.19/mg	+75.6%	99.8%	7	96	Buy code MERIT · 15% off
🇺🇸	Peptide Crafters ✓ verified at source · just now	$25.50· 5mg	$5.10/mg	-20%	99.2%	4	94	Buy code CRAFTERS10 · 10% off
	Nova Peptides ✓ verified at source · just now	$34.99· 5mg	$7.00/mg	+9.8%	—	—	94	Buy
🇺🇸	Ignite Peptides ✓ verified at source · just now	$30.00· 5mg	$6.00/mg	-5.9%	99.5%	2	93	Buy code MERIT · 10% off
🇺🇸	Polaris Peptides ✓ verified at source · just now	$40.00· 5mg	$8.00/mg	+25.5%	99.0%	1	90	Buy
🇺🇸	Peptidology ✓ verified at source · just now	$53.09· 15mg	$3.54/mg	-44.5%	99.1%	3	89	Buy
🇺🇸	Peptide Plugs ✓ verified at source · just now	$40.00· 10mg	$4.00/mg	-37.3%	99.2%	2	89	Buy

Top Merit pick

🇺🇸 Glacier Aminos
✓ verified at source · just now
99

$6.00/mg -5.9% vs avg

$59.99

10mg

99.2% purity 5 COAs

Buy code MERIT · 10% off
🇺🇸 Hydro Research Peptides
✓ verified at source · just now
97

$0.09/mg -98.6% vs avg

$0.45

5mg

99.9% purity 4 COAs

Buy code MERIT · 15% off
🇺🇸 Moglabs
✓ verified at source · just now
96

$5.60/mg -12.2% vs avg

$28.00

5mg

99.1% purity 2 COAs

Buy
🇺🇸 BioLongevity Labs
✓ verified at source · just now
96

$11.19/mg +75.6% vs avg

$55.97

5mg

99.8% purity 7 COAs

Buy code MERIT · 15% off
🇺🇸 Peptide Crafters
✓ verified at source · just now
94

$5.10/mg -20% vs avg

$25.50

5mg

99.2% purity 4 COAs

Buy code CRAFTERS10 · 10% off
Nova Peptides
✓ verified at source · just now
94

$7.00/mg +9.8% vs avg

$34.99

5mg

no purity

Buy
🇺🇸 Ignite Peptides
✓ verified at source · just now
93

$6.00/mg -5.9% vs avg

$30.00

5mg

99.5% purity 2 COAs

Buy code MERIT · 10% off
🇺🇸 Polaris Peptides
✓ verified at source · just now
90

$8.00/mg +25.5% vs avg

$40.00

5mg

99.0% purity 1 COA

Buy
🇺🇸 Peptidology
✓ verified at source · just now
89

$3.54/mg -44.5% vs avg

$53.09

15mg

99.1% purity 3 COAs

Buy
🇺🇸 Peptide Plugs
✓ verified at source · just now
89

$4.00/mg -37.3% vs avg

$40.00

10mg

99.2% purity 2 COAs

Buy

Prices observed from public storefronts (last 24h), normalized to $/mg. "Evidence" is Merit's 0–100 Merit Score, derived only from observable verification evidence (methodology on /about); "Purity" is the latest independent COA. Some buy links are affiliate links — Merit may earn a commission at no extra cost to you, and where a vendor offers one, the code shown gets you a discount at their checkout. Affiliate status never affects price data, ranking, or the Merit Score (full policy on /disclosure). Research use only.

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Compound reference

About DSIP

CAS

62568-57-4

Molecular formula

C35H48N10O15

Sequence

WAGGDASGE

Typical dose range

100-250 mcg/day subcutaneous, administered ~3 hours before bedtime; some studies used 25 nmol/kg (~21.4 mcg/kg)

Half-life

~15 minutes in vitro; ~4-5 minutes in animal studies; human elimination data limited

Independent evidence

COAs for DSIP

125 third-party tests across 36 vendors. Each card links to the full report.

All 125 COAs for DSIP →

Measured purity over time

DSIP

Who's worth your money for DSIP

Watch DSIP

About DSIP

COAs for DSIP

12 citations indexed for DSIP

Therapeutic Peptides in Aesthetic, Metabolic and Endocrine Conditions: Effects, Safety, Clinical Applications, and Future Perspectives

Peptide-Based Approaches for Pain Relief and Healing in Wounds

Predicting Sanitation Behaviors: Comparison of Willingness to Pay Techniques for Sanitation Services in Urban Dhaka, Bangladesh

Ion-Pair Speciation in Aqueous Alkali Fluorides from Nuclear Magnetic Resonance of &lt;sup&gt;19&lt;/sup&gt;F

Therapeutic Peptides in Orthopaedics: Applications, Challenges, and Future Directions

Equity and Social Care in Medicaid through Community Care Hubs

Ion-Pair Speciation in Aqueous Alkali Fluorides from Nuclear Magnetic Resonance of <sup>19</sup>F