Peer-reviewed study
Low appetite can create nutrition gaps
Micronutrient and Nutritional Deficiencies Associated With GLP-1 Receptor Agonist Therapy: A Narrative Review
Kris Oddo, NASM-certified personal trainer, is the founder and head coach of Gains From Geebs (Geebs Coaching), a 1:1 online fitness coaching practice.
Quick answer
What this study found
When appetite drops hard, the nutrition plan has to protect protein, fluids, fiber, calcium/iron-rich foods, and clinician-directed lab follow-up when risk is present.
How strong is this kind of study?
- Reviews of many studies
- Controlled trials
- Observational
- Narrative reviewsThis study
Narrative review. Heavier plates are built from more studies, so they move less when the next one lands.
At a glance
What kind of study this is
Early or limited evidence
A review, a lab study, or an analysis of collected data. Useful for direction, not strong enough to settle a question.
- Design
- Narrative review
- Published
- 2026
- Journal
- Clinical Obesity
- Reference
- PMID 41549912
Honest limits
What this study does not prove.
This is not a diagnosis or supplement prescription. The review is mainly observational, and lab testing or supplementation belongs with qualified clinicians.
Kris's practical takeaway
Here's what to do with it.
When appetite drops hard, the nutrition plan has to protect protein, fluids, fiber, calcium/iron-rich foods, and clinician-directed lab follow-up when risk is present.
Ways to use it
Safe ways to apply it.
Low appetite still needs nutrition standards
Lower appetite does not make food quality optional
Protein and micronutrients are not optional
Related questions
Questions this research helps answer.
Related guides and studies
Keep learning about peptides.
FAQ
Quick questions
What is the practical takeaway from this study?
When appetite drops hard, the nutrition plan has to protect protein, fluids, fiber, calcium/iron-rich foods, and clinician-directed lab follow-up when risk is present.
What does this study not prove?
This is not a diagnosis or supplement prescription. The review is mainly observational, and lab testing or supplementation belongs with qualified clinicians.
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25 lbAverage fat loss across 15 completed clients tracked over 16 weeks. Individual results vary.
1 of 3
2 months coachedDown 10 pounds and carrying more confidence into daily life.
Justin · 24 · 2 months coached“I've lost 10 lb, which has definitely given me more confidence. I'm not as tired during work and I can lift things easier than before.”
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6 months coachedFrom zero pull-ups to five on his own.
Jon Miller · 27 · 6 months coached“Before I couldn't do a single pull-up, and now I can do five all on my own.”
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3 months coachedBetter technique, better health, and support to keep going.
Jhoan Rincon · 46 · 3 months coached“Kris changed the way I view my life. Even though I do not have much free time, he helps me push myself to keep going and never lets me give up.”
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Pick the one that fits your week.
You have read the argument. These are the options, and whichever one you pick carries into the application.
1 of 5
Most hands-onYou want a coach on training, food and accountability every day.- Daily replies, usually within the hour
- FaceTime meal prep: cook, portion, freeze the week
- Fully custom plan with Kris's own demo videos
Core 1:1You want a coach with you daily, without the concierge layer.- Custom training plan with demo videos
- Macros-based nutrition, no rigid meal plan
- Daily accountability at standard priority
New, self-drivenYou run your own week and want a coach reading the numbers.- Custom training and nutrition plan
- One recorded Loom review of your week
- Adjustments based on what the week showed
One-time guidanceYou want direction now without a monthly commitment.- A focused 45-minute Zoom with Kris
- A real diagnosis of what is holding back progress right now
- Guidance on training, nutrition, accountability, or schedule
Community membershipYou want a serious fitness community without a coaching contract.- Access to the Titan Forge Science-Based Telegram community
- Training, nutrition, recovery, and research discussion
- Shared accountability with like-minded lifters