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    "title": "Your v4 peptide pen is metering wrong and here’s why",
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            "value": "2026-08-06",
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            "value": "Why a reusable metal dial pen can meter the wrong volume: check 3 ml glass cartridge fit before technique for repeatable dispensing of reconstituted peptide.",
            "source": "Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-v4-peptide-pen-metering-wrong-here-s-why)",
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            "attribute": "section",
            "value": "What it is",
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            "attribute": "section",
            "value": "Metal vs plastic: the tolerance gap that ruins repeatability",
            "source": "Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-v4-peptide-pen-metering-wrong-here-s-why)",
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            "attribute": "section",
            "value": "Glass cartridge tolerances and dead volume",
            "source": "Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-v4-peptide-pen-metering-wrong-here-s-why)",
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            "attribute": "section",
            "value": "Bacteriostatic water is the whole game",
            "source": "Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-v4-peptide-pen-metering-wrong-here-s-why)",
            "evidence": "https://www.preppinpeppers.com/blogs/the-lab/your-v4-peptide-pen-metering-wrong-here-s-why"
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            "value": "Reconstitution technique that actually preserves the peptide",
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            "value": "What most researchers get wrong about the v4 pen",
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            "value": "Related reading",
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            "attribute": "cites",
            "value": "Bacteriostatic Water for Injection, USP , FDA/DailyMed label (0.9% benzyl alcohol) - dailymed.nlm.nih.gov",
            "source": "Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-v4-peptide-pen-metering-wrong-here-s-why)",
            "evidence": "https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=87d6e9dc-fe3b-4593-ac9a-d7493d1959c7"
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            "category": "source",
            "entity": "Your v4 peptide pen is metering wrong and here’s why",
            "attribute": "cites",
            "value": "Bohannon, Postgrad Med 1999: Insulin delivery using pen devices. Simple-to-use tools may help young and old alike - pubmed.ncbi.nlm.nih.gov",
            "source": "Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-v4-peptide-pen-metering-wrong-here-s-why)",
            "evidence": "https://pubmed.ncbi.nlm.nih.gov/10560468/"
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            "category": "source",
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            "attribute": "cites",
            "value": "Jonker et al., Int J Clin Pharmacol Ther 2021: First pre-filled pen device with highly purified human menopausal gonadotropin (HP-hMG, Menopur) in liquid is shown to be bioequivalent to powder for reconstitution - pmc.ncbi.nlm.nih.gov",
            "source": "Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-v4-peptide-pen-metering-wrong-here-s-why)",
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            "attribute": "cites",
            "value": "Lingen et al., Endocr Connect 2023: Advantages and disadvantages of connected insulin pens in diabetes management - pmc.ncbi.nlm.nih.gov",
            "source": "Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-v4-peptide-pen-metering-wrong-here-s-why)",
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            "value": "Gansulin Pen · Reusable Click-Dial, 3 ml (1-60 Units)",
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            "value": "Gansulin-Compatible 3 ml Glass Cartridge for Pens (10-Pack)",
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            "q": "What is a v4 peptide pen?",
            "a": "A refillable, dial-a-dose dispensing tool with a machined metal body that accepts a 3 ml glass cartridge and delivers 0.01 ml of reconstituted peptide solution per click for repeatable research measurements."
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            "q": "Why does a metal pen body matter for peptide research?",
            "a": "Metal does not flex under plunger pressure, so each click advances the exact same distance."
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            "a": "Reconstitute gently by running bac water down the vial wall, let it sit 5 minutes, draw through a blunt fill needle, and prime once per cartridge; do not dial past your target and back."
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