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SourceCheck creates one material-level comparison. PEL publishes the tool and sells the PEL products shown.

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This link opens PEL’s Tirz / GLP-2 listing directly. Match the actual amount and original source rather than inferring equivalence.

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The other supplier’s offer remains unverified. Record a precise unanswered question; do not invent a source or result.

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Download the comparison record. It is a purchasing worksheet, not a laboratory certificate or supplier certification.