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ForumsCOA & Analytical TestingUnderstanding peptide purity percentages — what worked for you? Page 8

Understanding peptide purity percentages — what worked for you?

LondonLisa Wed, Apr 16, 2025 at 10:14 AM 38 replies 2,088 viewsPage 8 of 8
LibrarianMeg
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Jun 3, 2025 at 8:56 PM#36
lisa_labSD said:
If you are comparing against somebody else’s result, check that you are comparing the same measurement taken the same way.

That reframing is the part I needed. Sending this to two other people who asked me the same thing last week.

49 22Dr.NateNeph, PharmD_Rodriguez, julia.endo and 46 others
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newstart_MO
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Jun 6, 2025 at 9:06 AM#37

Adding the clinical framing, because it changes how the question reads. If two explanations both fit, the useful question is which one predicts something the other does not. That is answerable; arguing about which sounds more plausible is not.

50 23LibrarianMeg, bri_stats, pete_manc_UK and 47 others
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LipidDoc_ATL
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Jun 8, 2025 at 9:14 PM#38
newstart_MO said:
If two explanations both fit, the useful question is which one predicts something the other does not.

Adding a me-too, because a thread of one person's experience is not much use.

1 24AttorneyGrant
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julia.endo
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Jun 11, 2025 at 9:21 AM#39
newstart_MO said:
If two explanations both fit, the useful question is which one predicts something the other does not.

Adding the part of the answer the thread has not reached. The mechanism and the magnitude are separate questions. Agreeing that something happens says nothing about whether it happens enough to act on.

2 0jason_sac26, chris_chi24
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dan_philly
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Jun 13, 2025 at 9:26 PM#40

Adding the numbers, since they settle part of this. Give anything pharmacological four weeks before you judge it, and give anything measured weekly a four-point rolling average before you call it a trend.

24 22EndoResFellow, PharmacoVig_BOS, SurmountFan_IN and 21 others
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