Apr 6, 2025 at 7:18 PM#6
This is exactly the kind of data-driven post I love seeing here. Just ordered my first batch of QSC tirz based on posts like this.
Quick question — did you notice the 10mg dose working notably better than 7.5mg? I've read some people plateau and the jump from 7.5→10 doesn't do much. Trying to decide if I should stay at 7.5 longer before increasing.
48 18ingrid_STO, pete_nash, hank_denver and 45 others
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Apr 7, 2025 at 2:48 AM#7
Honestly the jump from 7.5 to 10 was subtle for me. The biggest leap in effectiveness was 2.5→5mg. After that the curve flattens. I moved to 10mg because my weight loss had slowed (only 2 lbs in weeks 11-12) and I wanted to push through.
If you're still losing consistently at 7.5, there's no rush to increase. Higher doses = more potential side effects and you burn through your supply faster. I'd say stay at 7.5 until you hit a clear 2-week plateau.
Last edited: Apr 7, 2025 at 8:48 AM
47 17InsuranceTom, WendyG_ATL, SaraMom3 and 44 others
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Apr 7, 2025 at 10:18 AM#8
Adding to the community data pool — I tested QSC tirz from Batch #TZ-2025-1204 (December order) at Janoshik:
- Purity: 97.4%
- Identity: Confirmed
Slightly lower than ChrisMacros's but still well above spec. Interesting to see the batch-to-batch variance. I've compiled 34 QSC tirz Janoshik results now:
| Range | Count | % |
|-------|-------|---|
| 98-100% | 12 | 35% |
| 96-97.9% | 18 | 53% |
| 94-95.9% | 3 | 9% |
| <94% | 1 | 3% |
Mean purity: 97.3%. That one sub-94% result (93.1%) was from an early 2025 batch and may have been a storage issue on the buyer's end. Pretty impressive consistency overall. 📈
46 16LindaRN_retired, tommy_boulder, hyun_seoul and 43 others
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Sigma-Aldrich — Research-Grade Standards
Certified reference materials, analytical reagents, and research-grade standards for peptide verification. Trusted by laboratories worldwide.
Shop Reference StandardsApr 7, 2025 at 5:48 PM#9
that table is gold. A mean of 97.3% across 34 independent consumer tests is remarkable for a gray-market peptide supplier. For comparison, some compounding pharmacies have had FDA citations for products testing below 90%.
Thanks everyone for the great discussion. This is why community-driven testing matters — no single test tells the full story, but 34 data points paints a very clear picture. QSC tirz is the real deal. 🔬
45 15SaraMom3, Dr.MetabolicMD, RetaRick_CA and 42 others
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