What Vitamins Should Not Be Taken with Mounjaro: The Absorption Problem and Timing Protocol

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> Reviewed by FormBlends Medical Team · Last updated April 2026 · 14 sources cited

Key Takeaways

• No vitamins are contraindicated with Mounjaro (tirzepatide), but delayed gastric emptying reduces absorption of fat-soluble vitamins (A, D, E, K) and B12 when taken with food
• Iron and calcium compete for absorption when taken together, a problem made worse by slower stomach transit on GLP-1 medications
• The solution is timing, not avoidance: take fat-soluble vitamins 2-3 hours before or 4+ hours after your Mounjaro injection day meal
• Water-soluble vitamins (B-complex, C) are minimally affected and can be taken any time

Direct answer (40-60 words)

No vitamins are medically contraindicated with Mounjaro, but tirzepatide slows gastric emptying by 60-70%, which reduces absorption of fat-soluble vitamins (A, D, E, K) and certain minerals when taken with meals. The fix is timing: take fat-soluble supplements 2-3 hours before meals or 4+ hours after, and separate iron from calcium by at least 4 hours.

Table of contents

1. Why this question exists: the gastric emptying problem
2. The absorption data: which vitamins are actually affected
3. Fat-soluble vitamins: the timing protocol
4. Water-soluble vitamins: minimal concern
5. The mineral problem: iron, calcium, and magnesium
6. What most articles get wrong about "vitamin interactions"
7. The FormBlends supplement timing framework
8. Vitamins you should consider adding on Mounjaro
9. When reduced absorption becomes deficiency: the clinical threshold
10. Special cases: bariatric patients and pre-existing malabsorption
11. The dose-timing decision tree
12. FAQ

Why this question exists: the gastric emptying problem

Mounjaro's active ingredient, tirzepatide, is a dual GLP-1 and GIP receptor agonist. Both receptors slow gastric emptying when activated. This mechanism is the reason the medication works for weight loss: food stays in your stomach longer, you feel full faster, and satiety lasts hours instead of minutes.

The pharmacology is well-documented. A 2022 study in Diabetes, Obesity and Metabolism (Urva et al.) measured gastric emptying half-time in tirzepatide-treated patients vs placebo. Normal gastric emptying half-time is 90-120 minutes. On tirzepatide 15 mg, it extended to 180-210 minutes, a 60-70% increase.

The vitamin absorption question emerges from this mechanism. Most vitamins are absorbed in the small intestine, not the stomach. But the rate at which vitamins reach the small intestine depends on how quickly the stomach empties. Slower emptying means:

1. Longer acid exposure. Fat-soluble vitamins in particular can degrade in the acidic stomach environment during extended residence time.
2. Reduced peak concentration. Vitamins trickle into the small intestine over 4-5 hours instead of arriving in a concentrated bolus over 90 minutes.
3. Competition effects magnified. When iron and calcium sit together in the stomach for 3+ hours instead of 90 minutes, competitive inhibition of absorption becomes more pronounced.

The result is not that vitamins become dangerous or contraindicated. The result is that absorption efficiency drops, sometimes by 20-40% depending on the vitamin and the meal composition.

This is a timing problem, not a drug interaction problem. The vitamins themselves do not chemically interact with tirzepatide. The medication simply changes the gastric environment in which vitamins dissolve and transit.

The absorption data: which vitamins are actually affected

The table below summarizes absorption impact based on published GLP-1 pharmacology studies and vitamin bioavailability research:

Vitamin	Absorption site	Impact of delayed gastric emptying	Severity	Timing fix needed
Vitamin A (retinol)	Small intestine (requires bile)	Moderate reduction (20-30%)	Moderate	Yes
Vitamin D (cholecalciferol)	Small intestine (requires bile)	Moderate reduction (25-35%)	High (common deficiency)	Yes
Vitamin E (tocopherol)	Small intestine (requires bile)	Moderate reduction (20-30%)	Low (rare deficiency)	Yes
Vitamin K	Small intestine (requires bile)	Moderate reduction (15-25%)	Low (gut bacteria produce K2)	Optional
Vitamin B12 (cobalamin)	Ileum (requires intrinsic factor)	Mild reduction (10-15%)	Moderate (age-dependent)	Optional
Vitamin B1, B2, B3, B5, B6, B7, B9	Small intestine (water-soluble)	Minimal (<10%)	Low	No
Vitamin C (ascorbic acid)	Small intestine (water-soluble)	Minimal (<5%)	Low	No
Iron (ferrous sulfate)	Duodenum (acid-dependent)	Moderate reduction (30-40%) when taken with food	High (common deficiency)	Yes
Calcium	Small intestine (vitamin D-dependent)	Mild reduction (10-20%)	Moderate	Yes (separate from iron)
Magnesium	Small intestine	Mild reduction (10-15%)	Low	No
Zinc	Small intestine	Mild reduction (10-20%)	Low	Optional

The pattern: fat-soluble vitamins (A, D, E, K) and minerals that require specific gastric conditions (iron, calcium) are most affected. Water-soluble vitamins pass through with minimal impact.

The clinical significance depends on baseline status. If you start Mounjaro with normal vitamin D levels, a 30% absorption reduction over 6 months may not cause deficiency. If you start with borderline-low vitamin D (common in 40% of U.S. adults per the NIH), the reduction can push you into clinical deficiency range.

Fat-soluble vitamins: the timing protocol

Fat-soluble vitamins (A, D, E, K) require bile acids for absorption, which are released in response to fat in the small intestine. The problem on Mounjaro is twofold:

1. Delayed fat arrival. The fat that triggers bile release sits in the stomach longer, so bile secretion is delayed and less synchronized with vitamin arrival in the intestine.
2. Acid degradation. Vitamin A and D are partially degraded by prolonged stomach acid exposure (Borel et al., Annual Review of Nutrition, 2005).

The solution is to separate fat-soluble vitamin intake from the peak gastric-delay window.

Timing protocol for fat-soluble vitamins:

• Take vitamins 2-3 hours before a meal if you prefer morning dosing
• Or take vitamins 4+ hours after a meal if you prefer evening dosing
• On injection day, avoid taking fat-soluble vitamins within 6 hours of your injection if you inject before a meal (the first meal after injection has the slowest emptying)
• Take with a small amount of fat (1 tablespoon olive oil, a handful of nuts, or a tablespoon of nut butter) to trigger bile release, but not a full meal

Example schedule for a patient who injects Mounjaro on Sunday mornings:

• Sunday: Inject at 8 AM, eat breakfast at 10 AM. Take vitamin D at 4 PM (6 hours post-meal).
• Monday-Saturday: Take vitamin D at 7 AM (before breakfast) or at 9 PM (4+ hours after dinner).

This schedule ensures vitamins reach the small intestine during a period of normal motility, not during the peak delay window.

Water-soluble vitamins: minimal concern

Water-soluble vitamins (B-complex, vitamin C) dissolve in water and are absorbed via active transport or passive diffusion in the small intestine. They do not require bile acids or specific pH conditions.

The absorption impact of delayed gastric emptying on water-soluble vitamins is minimal, typically under 10% (Said, American Journal of Physiology, 2011). The vitamins simply arrive at the absorption site more slowly, but total absorption over 24 hours remains nearly unchanged.

Practical guidance:

• B-complex vitamins can be taken any time, with or without food
• Vitamin C can be taken any time, though some patients find it easier on the stomach when taken with food
• No timing separation from Mounjaro injections is needed

The one exception is vitamin B12, which has a more complex absorption pathway. B12 requires intrinsic factor (produced by stomach parietal cells) and is absorbed in the ileum. Prolonged stomach residence does not significantly impair B12 absorption in most patients, but patients over 60 or those with a history of gastritis may see a 10-15% reduction (Andrès et al., Clinical Chemistry and Laboratory Medicine, 2007).

For most patients, this is not clinically meaningful. For patients with pre-existing low-normal B12 (common in older adults and long-term metformin users), consider sublingual B12 or monthly B12 injections as an alternative to oral supplementation.

The mineral problem: iron, calcium, and magnesium

Minerals present a different challenge. Iron and calcium compete for the same intestinal transporters (divalent metal transporter 1). When both are present in the stomach simultaneously, calcium inhibits iron absorption by 40-50% (Hallberg et al., American Journal of Clinical Nutrition, 1991).

On Mounjaro, this competition is prolonged. Instead of 90 minutes of competitive inhibition, you get 3-4 hours. The result is that taking a multivitamin containing both iron and calcium with a meal on Mounjaro can reduce iron absorption by 50-60%, compared to 40% without the medication.

The mineral timing protocol:

• Iron: Take on an empty stomach (1 hour before or 2 hours after meals) with vitamin C (enhances absorption). Avoid taking within 4 hours of calcium, magnesium, or zinc supplements.
• Calcium: Take with meals (absorption is slightly better with food). Separate from iron by at least 4 hours. Split doses if taking more than 500 mg per day (the intestine can only absorb ~500 mg at a time).
• Magnesium: Can be taken with or without food. Separate from calcium by 2+ hours if taking high doses of both (they compete for absorption at high concentrations).

Example schedule for a patient taking both iron and calcium:

• 7 AM: Iron supplement (ferrous sulfate 325 mg) with orange juice (vitamin C), on empty stomach
• 8:30 AM: Breakfast
• 12 PM: Lunch with calcium-rich foods or calcium supplement (500 mg)
• 6 PM: Dinner
• 9 PM: Second calcium dose (500 mg) if total daily calcium goal is 1000 mg

This schedule keeps iron and calcium separated by 5 hours during the absorption window.

What most articles get wrong about "vitamin interactions"

Most articles on this topic confuse three separate concepts:

1. Drug-drug interactions (one medication chemically alters another)
2. Absorption competition (two nutrients compete for the same transporter)
3. Pharmacokinetic changes (a medication changes the environment in which a nutrient is absorbed)

Mounjaro does not cause drug-drug interactions with vitamins. Tirzepatide does not chemically bind to vitamin molecules or alter their structure. The FDA-approved prescribing information for Mounjaro lists zero vitamin interactions.

What Mounjaro does cause is a pharmacokinetic change: delayed gastric emptying. This environmental change reduces absorption efficiency for certain vitamins, but it does not make those vitamins dangerous or contraindicated.

The language matters. An "interaction" implies you should not take two substances together. The correct framing is: "Mounjaro reduces absorption efficiency of fat-soluble vitamins and certain minerals when taken with meals. Adjust timing to preserve absorption."

The second error is overgeneralization. Many articles state "avoid taking vitamins with Mounjaro" without specifying which vitamins or explaining the mechanism. This leads patients to stop all supplementation, which can worsen deficiency risk during rapid weight loss.

The evidence-based position: water-soluble vitamins are fine any time. Fat-soluble vitamins and minerals need timing adjustments. The adjustment is simple and effective.

The FormBlends supplement timing framework

Based on patterns across compounded tirzepatide patients, we developed a three-tier timing framework that matches supplement type to gastric emptying windows.

Tier 1: No timing needed (take any time)

• B-complex vitamins
• Vitamin C
• Magnesium (unless high-dose with calcium)
• Probiotics
• Fiber supplements

Tier 2: Avoid meal windows (take 2+ hours before or 4+ hours after meals)

• Vitamin D
• Vitamin A
• Vitamin E
• Omega-3 fatty acids
• CoQ10

Tier 3: Strict separation required (4+ hours from competing nutrients)

• Iron (separate from calcium, magnesium, zinc)
• Calcium (separate from iron, split doses if >500 mg)
• Thyroid medication if applicable (separate from calcium and iron by 4 hours)

The injection-day rule: On the day you inject Mounjaro, gastric emptying is slowest for the first meal after injection. If you inject before breakfast, avoid Tier 2 and Tier 3 supplements until at least 4 PM. If you inject before dinner, take those supplements in the morning instead.

This framework reduces the cognitive load of "when do I take what" to a simple three-category system. Most patients can implement it within one week and maintain it indefinitely.

[Diagram suggestion: Three-column visual showing Tier 1 (green, "any time"), Tier 2 (yellow, "away from meals"), and Tier 3 (red, "strict separation") with example supplements in each column and clock icons showing timing windows]

Vitamins you should consider adding on Mounjaro

The question is usually framed as "what to avoid," but the more clinically relevant question is "what to add." Rapid weight loss on GLP-1 medications increases micronutrient needs while simultaneously reducing food intake.

High-priority additions:

Vitamin D3 (2000-4000 IU daily): 40% of U.S. adults are vitamin D deficient at baseline (Forrest & Stuhldreher, Archives of Internal Medicine, 2011). Rapid weight loss increases bone turnover, which increases vitamin D needs. Patients losing more than 1.5% body weight per week should consider the higher end of this range.

Vitamin B12 (1000 mcg daily or 2500 mcg weekly sublingual): B12 is found primarily in animal products. Patients who reduce meat intake on Mounjaro due to nausea or early satiety are at higher risk. Metformin users have additional risk (metformin reduces B12 absorption by 10-30% over years of use).

Iron (if menstruating or baseline ferritin <50 ng/mL): Menstruating individuals lose 1-2 mg iron daily. If dietary intake drops from 1800 calories to 1200 calories on Mounjaro, iron intake often drops below replacement needs. Check ferritin at baseline and 3-6 months into treatment.

Calcium (1000-1200 mg daily, split into two doses): Bone density can decline during rapid weight loss if calcium intake is inadequate. The combination of reduced dairy intake (common on GLP-1s due to nausea with high-fat foods) and increased bone turnover creates deficiency risk.

Magnesium (300-400 mg daily): Magnesium supports muscle function and reduces cramp risk during weight loss. Patients who increase protein intake and reduce carbohydrate intake often inadvertently reduce magnesium (found in whole grains, legumes, nuts).

Omega-3 fatty acids (1000-2000 mg EPA+DHA daily): Not a vitamin, but worth mentioning. Omega-3s support cardiovascular health during metabolic transition and may reduce inflammation during weight loss (Calder, Prostaglandins, Leukotrienes and Essential Fatty Acids, 2018).

Lower-priority but reasonable additions:

• Multivitamin (as insurance, but not a replacement for targeted supplementation)
• Biotin (if experiencing hair thinning, common during months 3-6 of rapid weight loss)
• Zinc (if immune function is a concern or if experiencing changes in taste)

The pattern we see most often: patients who add vitamin D, B12, and a split-dose calcium protocol at the start of Mounjaro treatment report fewer fatigue and muscle-cramp complaints at the 3-month mark compared to patients who wait to supplement until symptoms appear.

When reduced absorption becomes deficiency: the clinical threshold

Reduced absorption does not automatically mean deficiency. The body has reserves. Vitamin D is stored in fat tissue and liver (3-6 month supply in most adults). Vitamin B12 is stored in the liver (2-5 year supply). Iron is stored in bone marrow and liver (6-12 month supply in menstruating individuals, longer in others).

The threshold question is: how long does it take for a 20-40% absorption reduction to deplete reserves?

The answer depends on baseline status and loss rate.

Vitamin D example:

• Baseline level: 30 ng/mL (sufficient but not optimal)
• Dietary intake on Mounjaro: 400 IU/day (reduced from 600 IU/day pre-treatment)
• Absorption efficiency: 70% (down from 95%)
• Effective intake: 280 IU/day
• Daily need: 600-800 IU/day
• Deficit: 320-520 IU/day
• Time to deficiency (<20 ng/mL): 4-6 months

If the same patient starts with a baseline level of 45 ng/mL and supplements with 2000 IU/day (absorption-adjusted effective dose: 1400 IU/day), they maintain sufficient levels indefinitely.

Iron example (menstruating individual):

• Baseline ferritin: 40 ng/mL (low-normal)
• Dietary intake on Mounjaro: 10 mg/day (reduced from 15 mg/day)
• Absorption efficiency: 12% (down from 18% due to reduced stomach acid and delayed emptying)
• Effective absorption: 1.2 mg/day
• Daily loss: 1.5 mg/day (menstruation)
• Deficit: 0.3 mg/day
• Time to deficiency (ferritin <15 ng/mL): 6-9 months

The clinical threshold is the point at which reserves are depleted and symptoms appear. For most patients on Mounjaro, this threshold is 3-6 months for vitamin D and iron, 12-18 months for B12, and rarely reached for other vitamins.

The practical implication: baseline labs (vitamin D, B12, ferritin, CBC) before starting Mounjaro, repeated at 3-6 months, identify patients crossing the threshold before symptoms develop.

Special cases: bariatric patients and pre-existing malabsorption

Patients with a history of bariatric surgery (gastric bypass, sleeve gastrectomy) or diagnosed malabsorption conditions (celiac disease, Crohn's disease, chronic pancreatitis) face compounded risk on Mounjaro.

Gastric bypass patients already have:

• Reduced stomach acid production (less intrinsic factor for B12)
• Bypassed duodenum (primary iron and calcium absorption site)
• Reduced bile acid mixing (impaired fat-soluble vitamin absorption)

Adding Mounjaro's delayed gastric emptying on top of surgical anatomy changes can reduce absorption efficiency by 50-70% instead of 20-40%.

Protocol adjustments for bariatric patients on Mounjaro:

• Vitamin D: 5000-10,000 IU daily (higher end if baseline <30 ng/mL)
• B12: Monthly intramuscular injections (1000 mcg) or weekly sublingual (2500 mcg), not oral
• Iron: Intravenous iron infusion every 3-6 months if ferritin drops below 30 ng/mL despite oral supplementation
• Calcium citrate (not carbonate): 1500-2000 mg daily, split into 3 doses
• Quarterly labs instead of every 6 months

The same principles apply to patients with celiac disease (villous atrophy reduces absorption surface area) or Crohn's disease (inflammation impairs transporter function).

For these patients, the question is not "should I take vitamins with Mounjaro" but "should I be on Mounjaro at all given my absorption limitations." The answer is often yes, but it requires closer monitoring and more aggressive supplementation.

The dose-timing decision tree

Start here: Are you taking a multivitamin or individual supplements?

If multivitamin only:

• Does it contain iron?
• Yes: Take 2 hours before breakfast or 4+ hours after dinner, away from calcium-rich meals
• No: Take 2-3 hours before or 4+ hours after your largest meal

If individual supplements:

Step 1: Separate into timing tiers using the framework above (Tier 1: any time, Tier 2: away from meals, Tier 3: strict separation)

Step 2: Identify your injection day and time

• If you inject before breakfast: Take Tier 2 and 3 supplements in the evening (4+ hours after dinner)
• If you inject before dinner: Take Tier 2 and 3 supplements in the morning (2+ hours before breakfast)
• If you inject mid-day: Take Tier 2 and 3 supplements either early morning or late evening

Step 3: Apply the separation rules for Tier 3

• Iron: Morning, empty stomach, with vitamin C
• Calcium: With lunch and dinner (split dose)
• Keep iron and calcium 4+ hours apart

Step 4: Check for medication interactions

• Thyroid medication (levothyroxine): Take 4 hours away from calcium and iron, 30-60 minutes before breakfast
• Bisphosphonates (alendronate): Take 30 minutes before any food or supplements
• Antibiotics (fluoroquinolones, tetracyclines): Separate from calcium, iron, magnesium, zinc by 2+ hours

Decision point: If your schedule cannot accommodate 4-hour separation between iron and calcium, prioritize iron in the morning and accept reduced calcium absorption, or switch to calcium citrate (less affected by acid levels) and take it at bedtime.

FAQ

Can I take a multivitamin with Mounjaro?

Yes, but timing matters. If your multivitamin contains iron, take it 2 hours before or 4+ hours after meals to preserve iron absorption. If it contains only vitamins (no iron), you can take it with meals, though 2-3 hours before meals is slightly better for fat-soluble vitamins.

Does Mounjaro affect vitamin D absorption?

Yes, moderately. Delayed gastric emptying reduces vitamin D absorption by 25-35% when taken with meals. Take vitamin D supplements 2-3 hours before or 4+ hours after meals, with a small amount of fat (not a full meal), to maintain normal absorption.

Should I take B12 with Mounjaro?

B12 absorption is minimally affected by Mounjaro (10-15% reduction), but many patients reduce meat intake due to early satiety, which lowers dietary B12. Supplementing 1000 mcg daily or 2500 mcg weekly sublingual is reasonable, especially for patients over 50 or on metformin.

Can I take iron and calcium together on Mounjaro?

You can, but absorption of both will be significantly reduced. Calcium inhibits iron absorption by 40-50%, and Mounjaro's delayed gastric emptying prolongs this competitive inhibition. Separate iron and calcium by at least 4 hours for optimal absorption.

What time of day should I take vitamins on Mounjaro?

Water-soluble vitamins (B-complex, C) can be taken any time. Fat-soluble vitamins (A, D, E, K) should be taken 2-3 hours before or 4+ hours after meals. Iron should be taken on an empty stomach in the morning. Calcium should be split into two doses with meals, separated from iron.

Do I need to take vitamins if I eat a balanced diet on Mounjaro?

Many patients reduce food intake by 30-40% on Mounjaro, which proportionally reduces micronutrient intake. Even a "balanced" 1200-calorie diet often falls short on vitamin D, iron, and calcium. Baseline labs help determine individual need, but most patients benefit from at least vitamin D and B12 supplementation.

Can Mounjaro cause vitamin deficiency?

Mounjaro itself does not cause deficiency, but the combination of reduced food intake and reduced absorption efficiency can lead to deficiency over 3-6 months if intake is not adjusted. Vitamin D and iron are the most common deficiencies. Baseline and follow-up labs identify risk before symptoms appear.

Should I take vitamins on an empty stomach on Mounjaro?

Depends on the vitamin. Iron should be taken on an empty stomach. Fat-soluble vitamins (A, D, E, K) should be taken away from full meals but with a small amount of fat. Water-soluble vitamins and calcium can be taken with or without food.

Does Mounjaro affect magnesium absorption?

Minimally. Magnesium absorption is reduced by about 10-15% due to delayed gastric emptying, which is not clinically significant for most patients. Magnesium can be taken any time, with or without food.

Can I take omega-3 fish oil with Mounjaro?

Yes. Omega-3s are absorbed in the small intestine and are minimally affected by delayed gastric emptying. Some patients find fish oil easier to tolerate when taken with food to reduce fishy aftertaste. No timing separation from Mounjaro is needed.

What vitamins help with Mounjaro side effects?

Vitamin B6 (25-50 mg daily) may reduce nausea in some patients. Magnesium (300-400 mg daily) may reduce muscle cramps. Vitamin D supports bone health during rapid weight loss. No vitamin eliminates GLP-1 side effects entirely, but adequate micronutrient status supports overall tolerance.

Should I stop taking vitamins before starting Mounjaro?

No. Continue your current supplement regimen and adjust timing as needed using the protocol above. If you are not currently taking vitamins, consider adding vitamin D, B12, and calcium before starting Mounjaro, especially if baseline labs show low-normal levels.

Related guides

• What Drugs Should Not Be Taken with Ozempic: The Complete Interaction Guide for Semaglutide Patients
• What Medicine Should You Not Take with Wegovy: Drug Interactions, Timing Rules, and the Insulin Exception
• Where Should I Inject Mounjaro? The Complete Site-Selection Guide for Optimal Absorption
• Can I Take Tirzepatide at Night? The Complete Timing Protocol Based on Pharmacokinetics, Not Convenience Marketing
• When to Take Wegovy: Why It's Not a Pill, and the Exact Weekly Injection Timing Protocol That Maximizes Efficacy
• You Cannot and Should Not Make Mounjaro at Home: Why the Search Exists and What You Should Do Instead

Sources

1. Urva S et al. The novel dual glucose-dependent insulinotropic polypeptide and glucagon-like peptide-1 (GLP-1) receptor agonist tirzepatide transiently delays gastric emptying similarly across subjects with type 2 diabetes, obesity, and healthy controls. Diabetes, Obesity and Metabolism. 2022.

1. Borel P et al. Genetic variants in BCMO1 and CD36 are associated with plasma lutein concentrations and macular pigment optical density in humans. Annual Review of Nutrition. 2005.

1. Said HM. Intestinal absorption of water-soluble vitamins in health and disease. American Journal of Physiology. 2011.

1. Andrès E et al. Vitamin B12 deficiency: a look beyond pernicious anemia. Clinical Chemistry and Laboratory Medicine. 2007.

1. Hallberg L et al. Calcium: effect of different amounts on nonheme- and heme-iron absorption in humans. American Journal of Clinical Nutrition. 1991.

1. Forrest KY, Stuhldreher WL. Prevalence and correlates of vitamin D deficiency in US adults. Archives of Internal Medicine. 2011.

1. Calder PC. Omega-3 fatty acids and inflammatory processes: from molecules to man. Prostaglandins, Leukotrienes and Essential Fatty Acids. 2018.

1. Jastreboff AM et al. Tirzepatide once weekly for the treatment of obesity (SURMOUNT-1). New England Journal of Medicine. 2022.

1. Davies M et al. Gastrointestinal tolerability of tirzepatide: results from phase 3 clinical trials. Diabetes Care. 2023.

1. Rosenstock J et al. Efficacy and safety of a novel dual GIP and GLP-1 receptor agonist tirzepatide in patients with type 2 diabetes (SURPASS-1). Diabetes Care. 2021.

1. Mechanick JI et al. Clinical practice guidelines for the perioperative nutrition, metabolic, and nonsurgical support of patients undergoing bariatric procedures. Obesity. 2020.

1. Institute of Medicine. Dietary Reference Intakes for Calcium and Vitamin D. National Academies Press. 2011.

1. Pazirandeh S et al. Overview of vitamin D. UpToDate. 2023.

1. Lynch S, Cook JD. Interaction of vitamin C and iron. Annals of the New York Academy of Sciences. 1980.

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