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ForumsNutrition & SupplementationProbiotics on GLP-1 — anyone have experience?

Probiotics on GLP-1 — anyone have experience?

PeptideSynthNJ Wed, Jan 8, 2025 at 10:29 PM 12 replies 1,744 viewsPage 1 of 3
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PeptideSynthNJ
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Jan 8, 2025 at 10:29 PM#1

This is the version of the explanation I wish somebody had given me, written down before I forget what confused me. It is about protein intake, and it is deliberately narrow — everything I am not confident about is marked as such.

What is actually established

On a suppressed appetite the winning strategy is protein density per unit of volume, not per calorie. Isolate powders, Greek yoghurt and cottage cheese, egg whites, lean fish, and tinned tuna all deliver a lot of protein in a small physical volume. Front-load it: appetite is usually least suppressed in the first hours after waking and worst on the day or two after dosing, so get the majority in early in the day and early in the week.

The condition it depends on

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.

The practical version

The arithmetic that makes it tractable: reference weight in kg times 1.6 gives the target; divide by four for a per-sitting figure; then find four foods that hit that figure in a volume you can actually finish. Most people need two of the four to be liquid or semi-liquid early on.

What I am not sure about

What would genuinely help is knowing how people are hitting a protein target on a genuinely suppressed appetite, because volume is the binding constraint rather than willingness. If the honest answer is that nobody knows, that is a useful answer and I would rather have it.

— PeptideSynthNJ · corrections welcome and will be edited into this post with credit
14 9wanda_boise, NurseAsh_DET, BenResearch_OR and 11 others
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NurseKim_ATL
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Jan 9, 2025 at 12:27 AM#2
PeptideSynthNJ said:
On a suppressed appetite the winning strategy is protein density per unit of volume, not per calorie.

No disagreement with PeptideSynthNJ. One condition attached. The RDA is the wrong reference and it is worth understanding why. 0.8 g/kg is the intake at which nitrogen balance is not negative in healthy weight-stable adults — a floor for deficiency prevention, not an optimum, and derived in a population that is not in a deficit. In a substantial energy deficit, protein requirement rises because amino acids are being oxidised for energy and because muscle protein synthesis is blunted. The literature on preserving lean mass during weight loss lands around 1.4 to 2.0 g/kg of reference body weight, which is roughly two to two and a half times the RDA.

13 8raj_cambridge, ingrid_STO, pete_nash and 10 others
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Dr.ObesityLA
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Jan 9, 2025 at 2:25 AM#3
PeptideSynthNJ said:
On a suppressed appetite the winning strategy is protein density per unit of volume, not per calorie.

I will push back on the powder-first advice. It works and it also trains people out of eating food, and when the drug stops the habits are what remain. Getting protein from meals is slower and holds up better afterwards.

Last edited: Jan 9, 2025 at 3:25 AM
12 7tampaLisa73, KarenAZ_mom, zoe_NC and 9 others
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Dr.PeteFamMed
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Jan 9, 2025 at 4:23 AM#4

Short answer first, then the reasoning. Distribution matters less than total but it is not nothing. Roughly 25 to 40g per sitting with enough leucine to trigger synthesis, three or four times a day, is more effective than the same total in one enormous evening meal — and on a suppressed appetite the enormous evening meal is the one you will not finish anyway.

11 6Dr.BariatricHTX, LindaRN_retired, tommy_boulder and 8 others
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raj_cambridge
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Jan 9, 2025 at 4:02 PM#5
NurseKim_ATL said:
The RDA is the wrong reference and it is worth understanding why.

Same pattern here, and in the same order.

10 5RickReta_CO, PharmHunterJen, TomTeleRx and 7 others
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