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Optimal Source LLC: Independent Lab Review (2 COAs Tracked)

Lab-verified evidence

An independent, evidence-first review of Optimal Source LLC — wondering if Optimal Source LLC is legit? Every number below is sourced from 2 third-party lab certificates of analysis, not vendor marketing. The aggregate lab metrics and purity distribution are free; certificate-level records, pricing & stock are TitrateLab Pro.

What the evidence says

Evidence window 2026-05-24 to 2026-08-18

Evidence through 2026-08-18. The 2 measured purity results averaged 99.9%; 0 were below 90%. In the last 12 months, 0 of 2 dose results were more than 10% under label; 1 were on target and 1 were over.

Measured purity

99.9%mean across 2 measured results

2 of 2 at or above 90% purity

Dose results: measured amount against the printed label

Last 12 months2 results · since 2025-08-23 · latest 2026-08-18

0 under (0.0%)
1 on target (50.0%)
1 over (50.0%)

All time2 results · 2026-05-24 to 2026-08-18

0 under (0.0%)
1 on target (50.0%)
1 over (50.0%)

How these figures were calculated

A dose result is a certificate that reports a measured amount against the amount printed on the label. Under means more than 10% below the label, over means more than 10% above it, and on target is everything in between, inclusive. Positive purity measurements form the purity mean. When the labeled compound was not detected, that result is reported as an identity failure instead of 0% purity. Finnrick results are excluded from dose figures because that lab measures against the vendor's batch claim rather than the label; their purity and identity results still count. Missing values are never counted as passes.

Missing evidence:

2 of 2 counted certificates lack a usable endotoxin result.

No flagged purity, identity, or underfill findings

Across 2 dose results and 2 reported identity/purity results, no result was more than 10% under label, no labeled compound went undetected, and no positive purity measurement fell below 90%.

This does not mean every product was tested. Overfills, endotoxin coverage, and missing evidence are reported separately on this page.

Dose results by compound

All time. Compounds with at least 5 dose results; the sample size is shown on every row.

1 more compound with fewer than 5 dose results (2 results in total) are not ranked: too few results to describe a pattern.

Endotoxin

Reported separately from purity and dose. Only classifiable results count: a result the lab reported as pass, borderline or fail. Silence is not a pass.

No classifiable endotoxin result is on file for any of the 2 counted records.

Complete Optimal Source LLC evidence

Full-resolution certificate images and the complete batch history.

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Purity distribution

all 2 reported results · purity %

Select a batch point ≥90% Below 90% Average

COAs tracked

third-party certs

On target, last 12 months

1 of 2

dose results within 10% of the label

Compounds

distinct peptides

Coverage

2026-05 → 2026-08

first → latest test

Compounds tested

1 distinct · 2 certs

Grouped by class, most-tested first. Tap any compound to expand its Optimal Source LLC certificate archive. Certificate details remain obscured until Pro.

Certificate archive

2 third-party COAs · Pro

The evidence count, aggregate lab metrics, batch-purity distribution, five worst valid underfills, and classifiable endotoxin results are public. The complete certificate archive and remaining certificate-linked results require TitrateLab Pro.

See every Optimal Source LLC batch we can verify.

Open all 2 certificates with images, labs, test dates, measured purity, fill accuracy, and the batch-by-batch history behind this dossier.

Buyer protection on eligible TitrateLab orders. Report a wrong or defective product within 7 days and we broker a refund or reship with the vendor. Test what we sold you, and if it comes back under 95% purity and more than 13% underdosed, we reimburse 50% of your lab report and reship the product free. Both conditions have to be met.

Unlock Optimal Source LLC — $12/mo or $33 lifetime

Coverage applies only to eligible orders placed through TitrateLab. Pro access does not certify a vendor or batch.

Per-compound purity

mean purity by peptide · Pro

Average assayed purity for each of 1 compounds — the batch-level breakdown behind the headline average. Tap the tile to unlock with Pro.

View per-compound purity · Pro

Community reviews

Pro-member sourced

No community reviews yet. Pro members can post the first.

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The aggregate metrics and purity distribution above are free. Pro links every measured result to its certificate, lab, method and test date, adds the per-compound breakdown, and unlocks live pricing, stock & the full review thread.

Inline purity, all 2 batches Certificate images & lab sources Per-compound breakdown Live price & $/mg Current stock Every full review

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Frequently asked

purity & lab evidence

Is Optimal Source LLC legit?

TitrateLab does not rank or recommend vendors; it reports what independent labs measured. Optimal Source LLC shows high measured purity (99.9% mean across 2 positive purity measurements). Dose accuracy is mixed and no recent result was under label: in the last 12 months 1 of 2 dose results were on target, 0 under label and 1 over; all time 1 of 2 on target, 0 under and 1 over. These results describe tested batches, not every product or shipment.

What is Optimal Source LLC's average purity?

99.9% mean measured purity across 2 positive third-party lab results; 2 were at or above 90% and 0 were below.

How many Optimal Source LLC lab certificates has TitrateLab tracked?

2 third-party certificates from 2026-05-24 to 2026-08-18, covering 1 compound.

How accurate are Optimal Source LLC's doses?

Dose accuracy is mixed and no recent result was under label: in the last 12 months 1 of 2 dose results were on target, 0 under label and 1 over; all time 1 of 2 on target, 0 under and 1 over. A dose result compares the measured amount with the amount printed on the label: under is more than 10% below, over is more than 10% above, on target is everything in between. Finnrick results are excluded because that lab measures against the vendor's batch claim. Missing values are never counted as passes.

Has Optimal Source LLC failed an endotoxin test?

No classifiable endotoxin result is on file for any of the 2 counted records.

Answers are derived from the third-party lab certificates TitrateLab tracks for this vendor and describe tested purity only. This is research-use-only information, not medical advice and not a recommendation to purchase or use any product.

Head to head Compare Optimal Source LLC vs Peptaris Side-by-side lab purity, in-spec rate & COA count — independent evidence.

How this is sourced. TitrateLab tracks certificates of analysis posted by the community and verified against the issuing lab. Purity, test dates, and compound names shown here are the same facts published on each public certificate page — aggregated, never edited. Dose results compare the measured amount with the printed label and are reported as under, on target or over; Finnrick results are excluded from dose figures. Results reflect the batches that were tested and are not a guarantee of every order. Scores come only from lab data — no vendor pays for placement, and customer orders or Pro never move a grade. Browse the COA corpus →