Understory Nutrition
4-minute read

Nearly 1 in 4 people on a GLP-1 is diagnosed with a nutrient deficiency within 12 months. These 5 things decide whether you end up healthier, or just skinnier.

Appetite dropped by two thirds. The body's requirements didn't move. Here is what happens in that gap, and what the people who stay on the medication past month three do about it.

Formulated for adults on GLP-1 therapy. Taken alongside your medication, never instead of it. Third-party tested. Every dose disclosed.

The nausea that spikes with every dose increase. The constipation that runs for weeks. The burps that taste like rotten eggs in the middle of a meeting. None of it is bad luck and none of it is weakness. At the top dose, 44 out of every 100 people on semaglutide report nausea. Between 40 and 70 percent develop some digestive side effect. It is the most predictable thing about these medications.

What almost nobody is told is what happens underneath it.

1

Appetite went down. Requirements didn't.

Two dials on a navy faceplate: APPETITE turned nearly to zero, REQUIREMENTS still near maximum.

These medications cut appetite 60 to 80 percent within weeks, and they cut everything, not just the junk. The foods carrying iron, B12, folate and zinc shrink with the rest. The body's requirements haven't moved an inch.

60%+
of people on GLP-1 medications eat below estimated requirements for calcium and iron. Average vitamin D intake sits near 20% of the recommendation.

Nothing is broken. A third of the food simply carries a third of the nutrients.

2

Nearly one in four is deficient within a year. Nobody is checking.

Open academic journal on a desk with one line highlighted: there are currently no consensus guidelines for micronutrient monitoring.

In a study of 461,382 people on these medications, 12.7 percent were newly diagnosed with a nutritional deficiency within six months.

12.7% → 22.4%
Six months to twelve. The rate nearly doubles inside a year. Butsch et al., Obesity Pillars, 2025.

A 2026 review across 480,825 adults called deficiency on these drugs a common consequence, not a rare adverse effect. A peer-reviewed obesity journal has recommended a daily complete multivitamin and mineral with iron, zinc, B12 and folate as the interim standard, specifically because no screening standard exists.

The fatigue, the cold hands, the hair in the drain. One explained thing, not three mysteries.

3

Nobody has written the protocol for this yet.

Two doorways labeled SURGICAL and PHARMACY. Under the first, a protocol booklet, pill organizers, a calendar and a lab form. Under the second, only an injection pen and a pill bottle.

Bariatric surgery shrinks intake about as much as these medications do. So in 2008 the surgical societies wrote a mandatory, lifelong supplement protocol, updated in 2016 with 92 recommendations. B12. Iron. Folate. Thiamine. Lab work on a schedule.

2008 vs 0
Eighteen years of nutritional guidelines behind one door. Zero consensus guidelines for micronutrient monitoring behind the other.

That isn't a prescriber's failure. 83 percent of physicians say they don't have time to counsel on nutrition, and 62 percent say they weren't trained for it. Fifteen minutes, and no protocol to hand anyone. Eighteen years of catching up behind one door, two behind the other.

4

The usual fixes make the gap wider.

Broccoli, eggs, garlic and raw steak, each crossed out, labeled IRON, B12, FOLATE and ZINC.

The standard advice for sulfur burps is to cut broccoli, eggs, garlic and red meat. Those are the four densest sources of iron, B12, folate and zinc, the exact nutrients already running short. The most common remedy for the most humiliating symptom deepens the underlying problem.

And the drugstore multivitamin bought to cover it was built for a normal gut with normal intake.

31% vs 8%
Black stools on ferrous sulfate, the iron in most multivitamins, vs. ferrous bisglycinate, at equivalent doses. Two randomized studies, n=482. Constipation and nausea followed the same pattern.

Folic acid needs an enzyme conversion that 30 to 40 percent of people carry a gene variant for. Methylfolate skips it. Good instincts. Wrong tools.

5

Side effects end nearly twice as many prescriptions as cost does.

Bar chart of reasons for stopping within 180 days: adverse reactions 26.8%, cost 14.4%, non-adherence 11.2%.
26.8% vs 14.4%
Share of people who stopped within 180 days because of adverse reactions vs. because of cost. Real-world analysis, n=1,374. Nausea is the single most-cited reason.

Month three is where most people who quit, quit. And stopping has a documented price: a meta-analysis of eight trials put regain at 9.69 kg over the following year, roughly two-thirds of what was lost.

Staying comfortable and staying on the medication turn out to be the same problem. Staying on it is the whole point.

For the first time in decades, the kitchen is just a room. That is the thing worth protecting.
The protocol, written down

The nutrients the research names, in the forms a slowed gut can handle. Two capsules.

Engraved capsule opened to show its contents: iron bisglycinate, B12 methylcobalamin, folate L-5-MTHF, zinc bisglycinate, ginger, peppermint and B. coagulans.

Half of it is a multivitamin. That part isn't the point. The point is the forms, and the digestive-comfort half that no multivitamin has.

  • Iron as ferrous bisglycinateThe 8% form, not the 31% form.
  • B12 as methylcobalaminThe active form. No conversion step, better tissue retention than cyanocobalamin.
  • Folate as L-5-MTHFBypasses the enzyme step 30–40% of people carry a variant for.
  • Zinc as bisglycinate43% higher bioavailability than zinc gluconate in a randomized crossover.
  • Ginger, peppermint and a spore-form probioticDigestive comfort support. Bacillus coagulans survives stomach acid and needs no refrigeration.
  • BioPerineShown in human studies to raise absorption of nutrients taken alongside it.
Will it interfere with the medication?
The FDA labels for these medications state that in clinical pharmacology trials, no clinically relevant drug–drug interactions were observed with the oral medications tested. Absorption timing can shift, which is why there is timing guidance: take with food, or in the evening. Alongside your medication. Never instead of it.
Another pill on a stomach that's already nauseous?
Two small capsules a day. With food, or in the evening.
Is this one of those "natural Ozempic" things?
No. This product does not replicate, replace or mimic any medication, and it isn't intended to. It's the nutrition protocol that should have come with it.
What am I actually getting?
Every dose disclosed. No proprietary blends. Third-party tested, batch certificate available.
$49per month
  • Under 5% of what a month of the medication can cost. It protects the other 95%.
  • One-time purchase or subscribe. Cancel in one click.
  • 60-night guarantee. A full titration cycle to judge it.
See the full protocol

Ingredient panel, doses and sourcing on the next page.

This is what the informed ones do.

Not damage control. The protocol, run properly.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Understory Nutrition is a dietary supplement taken alongside prescribed medication and does not replace it. Consult your prescriber before adding any supplement, particularly if you take other oral medications.

Figures cited are from published ingredient-level and population research, not studies of this product: Butsch et al., Obesity Pillars 2025 (n=461,382); Clinical Obesity 2026 narrative review (n=480,825); ASMBS Allied Health Nutritional Guidelines 2008/2016; Milman et al., randomized iron-form studies (n=482); real-world 180-day discontinuation analysis (n=1,374); meta-analysis of 8 RCTs on post-cessation regain; physician nutrition-counseling survey (83% / 62%); Wegovy and Zepbound FDA prescribing information §7.2.