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ForumsCOA & Analytical TestingAmino acid analysis for peptide identity — beyond mass spec Page 2

Amino acid analysis for peptide identity — beyond mass spec

PeptideSynthNJ Wed, May 27, 2026 at 3:38 AM 21 replies 716 viewsPage 2 of 5
lisa_labSD
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May 27, 2026 at 3:56 AM#6
PeptideSynthNJ said:
Distribution matters less than total but it is not nothing.

DEXA scan update relevant to protein intake:

Scanned at months 0, 6, and 12. Here are the body comp numbers:

BaselineMonth 6Month 12
Total mass251 lbs236 lbs208 lbs
Fat mass111 lbs71 lbs43 lbs
Lean mass149 lbs154 lbs155 lbs
Body fat %44%34%22%

Lean mass preserved — actually GAINED 1-2 lbs thanks to progressive overload + 1.5g/kg protein. The protein intake discussion needs to include body comp data, not just scale weight.

15 10stefan_berlin, Dr.EM_Chicago, pete_RVA and 12 others
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JenPlateau
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May 27, 2026 at 4:04 AM#7

Following on from PharmD_Rodriguez — and this may be the naive question:

How people are hitting a protein target on a genuinely suppressed appetite, because volume is the binding constraint rather than willingness?

14 9TrialNerd_Beth, HPLC_Greg, LibrarianMeg and 11 others
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paige_pharma
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Omaha, NE
May 27, 2026 at 4:11 AM#8
lisa_labSD said:
DEXA scan update relevant to protein intake: Scanned at months 0, 6, and 12.

Adding the part of the answer the thread has not reached. The mental-health dimension is under-measured in the trial literature and the reports here are consistent enough to take seriously. On the positive side: reduced anxiety around food, better self-image, more confidence. On the difficult side: grief for the years lost, identity disruption, relationships built around eating, and the loss of food as a coping mechanism with nothing put in its place. Rarer but real: anhedonia and emotional flatness. Regulators have started asking for validated patient-reported outcomes in this class; the existing data gap is not evidence of absence.

13 8adam_van, Dr.SurgeonPGH, rachel_ABQ and 10 others
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PeptideSynthNJ
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Princeton, NJ
May 27, 2026 at 4:18 AM#9

OP back with an update, since a thread like this is useless without one.

Front-loading was the answer. Same total intake, same drug, but two thirds of the protein before midday and I am hitting the target most days now.

12 7MikeKY_noInsulin, Dr.RaviCardio, jennifer_SEA and 9 others
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anders_CPH
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Copenhagen, DK
May 27, 2026 at 4:52 AM#10
paige_pharma said:
The mental-health dimension is under-measured in the trial literature and the reports here are consistent enough to take seriously.

True, and anyone with reduced kidney function needs that target set by a clinician rather than a forum. High protein is safe in normal kidneys and is not automatically safe in impaired ones.

Correct me if the detail matters more than I have assumed.

34 7ChrisMacros, KetoKyle, CanadaChris and 31 others
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