Does the Mirena IUD deplete the same nutrients as oral levonorgestrel?

The Mirena IUD delivers levonorgestrel locally to the uterus with lower systemic absorption than oral pills. According to 223 gene interactions cataloged in CTD for levonorgestrel, the depletion pathways are the same but IUD users typically experience less severe B-vitamin and antioxidant depletion because peak systemic progestin levels are lower. Magnesium and zinc depletions — driven by renal and hepatic redistribution — may still occur at clinically meaningful levels. Testing B6 PLP and homocysteine after 6-12 months of Mirena use reveals your individual depletion pattern.

Should I take folate while on levonorgestrel?

Yes, particularly if there is any possibility of future pregnancy. Folate depletion from levonorgestrel creates a high-risk window when discontinuing for conception — neural tube closure occurs by day 28, often before pregnancy is confirmed. Across 1,527 PubMed-indexed articles on levonorgestrel, folate repletion with methylfolate (5-MTHF) 800mcg daily is recommended over folic acid because 40% of the population carries MTHFR gene variants that reduce folic acid conversion efficiency. Start supplementation immediately, not just when planning conception.

Can levonorgestrel cause depression?

Mood changes are among the most common reasons women discontinue hormonal contraceptives, and B6 depletion is a primary biochemical mechanism. Pyridoxal phosphate is the rate-limiting cofactor for serotonin and dopamine synthesis — when levonorgestrel drains B6 through accelerated tryptophan metabolism, neurotransmitter production drops. According to 68 curated disease associations for levonorgestrel in CTD, mood disturbance is well-represented. The zinc-copper ratio imbalance (zinc drops, copper rises) independently contributes to anxiety and emotional reactivity. Testing B6 PLP and zinc before attributing mood changes solely to hormones can identify correctable deficiencies.

Why does levonorgestrel lower zinc and raise copper?

Levonorgestrel induces hepatic metallothionein and ceruloplasmin production, proteins that sequester zinc intracellularly while releasing copper into circulation. This redistribution is a direct progesterone receptor-mediated effect. Across 109 randomized controlled trials involving 269,064 patients in levonorgestrel research, the elevated copper-to-zinc ratio is consistently documented in hormonal contraceptive users. Ratios above 1.4 are associated with anxiety, mood instability, and immune dysfunction. Supplementing zinc 15-30mg daily with food can normalize this ratio, but long-term zinc supplementation requires small amounts of copper (1-2mg) to prevent secondary deficiency.

What supplements should I take with levonorgestrel?

A targeted protocol addresses all 7 depletions: P5P (active B6) 25-50mg, methylfolate 800mcg, methylcobalamin (B12) 1000mcg sublingual, magnesium glycinate 300-400mg at bedtime, zinc 15-30mg with food, vitamin C 500-1000mg, and mixed tocopherol vitamin E 200 IU. According to 1,715 disease associations in CTD for levonorgestrel, the methylation pathway nutrients (B6, folate, B12) are the highest priority because they affect neurotransmitter synthesis and cardiovascular homocysteine levels. A quality prenatal vitamin covers most of these if you prefer one product.

Does Plan B emergency contraception cause the same depletions?

Plan B delivers a single high dose (1.5mg) of levonorgestrel — the same compound but in a one-time exposure rather than chronic use. A single dose does not cause meaningful nutrient depletion because the depletions cataloged for levonorgestrel require sustained exposure over months. According to the pharmacokinetic profile with 100% bioavailability and 40-hour half-life, Plan B clears within days. The 7-nutrient depletion pattern applies specifically to women using chronic levonorgestrel formulations: Mirena IUD, Kyleena IUD, or daily oral contraceptive pills containing levonorgestrel.

7 Nutrients Affected · Based on CTD Molecular Database

What Does Levonorgestrel Deplete? 7 Nutrients Affected

Levonorgestrel (Mirena, Plan B, Kyleena) depletes vitamin B6, folate, vitamin B12, magnesium, zinc, vitamin C, and vitamin E through progesterone receptor activation and downstream metabolic shifts. The Comparative Toxicogenomics Database catalogs 223 gene interactions for levonorgestrel across 68 curated disease associations, with 109 randomized controlled trials involving 269,064 patients. As a synthetic progestin with 100% oral bioavailability and a 40-hour half-life, levonorgestrel delivers continuous hormonal exposure that progressively alters B-vitamin metabolism, mineral transport, and antioxidant reserves over months of use.

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Data sourced from CTD, ChEMBL, FAERS, PubMed. How we verify this data →

Sources verified as of April 2026

[01]

Depletions Overview

Vitamin B6

Moderate

Levonorgestrel accelerates tryptophan metabolism through the kynurenine pathway, consuming pyridoxal phosphate (the active form of B6) as a cofactor at dramatically increased rates. According to 223 gene interactions cataloged in CTD for levonorgestrel, estrogen-responsive tryptophan dioxygenase upregulation creates a metabolic drain on B6 reserves that worsens with duration of use. This B6 depletion is clinically significant because pyridoxal phosphate is also the rate-limiting cofactor for serotonin and dopamine synthesis — meaning the mood changes many women attribute to their hormonal contraceptive may actually reflect a correctable nutrient deficiency.

Onset: Months

Folate

Moderate

Levonorgestrel impairs folate polyglutamate absorption in the intestinal brush border and accelerates hepatic folate catabolism through progesterone receptor-mediated enzyme induction. Across 1,527 PubMed-indexed articles on levonorgestrel, the folate-lowering effect of hormonal contraceptives is among the most consistently documented nutrient interactions. This is especially consequential for women of reproductive age because folate is critical for neural tube development in the first 28 days of pregnancy — often before a woman realizes she has conceived. Discontinuing levonorgestrel without prior folate repletion creates a high-risk window.

Onset: Months

Persistent fatigue that doesn't improve with more sleepMouth sores or a swollen tongue that recursPale skin or feeling lightheaded when standingDifficulty remembering names or finding wordsAnxiety that emerged or worsened on the medication

Vitamin B12

Low

Levonorgestrel reduces vitamin B12 absorption by altering intrinsic factor binding and lowering transcobalamin II transport protein levels. According to ChEMBL mechanism-of-action data classifying levonorgestrel as a progesterone receptor agonist, the hormonal shift toward a progesterone-dominant state modifies gastric acid secretion and mucosal protein expression in ways that impair B12 uptake from food. Depletion develops slowly because the liver stores 3-5 years of B12, but subclinical deficiency — detectable by elevated methylmalonic acid before serum B12 drops below range — can accumulate in long-term users.

Onset: Months-years

Fatigue that worsens gradually over monthsPins-and-needles sensation in hands or feetEpisodes of dizziness or balance problemsMemory lapses that feel unusual for your ageA smooth or burning tongue

Magnesium

Low-Moderate

Levonorgestrel increases renal magnesium excretion through progesterone-mediated changes in kidney tubular reabsorption. Across 109 randomized controlled trials involving 269,064 patients in levonorgestrel research indexed by CTD, the progesterone receptor activation shifts electrolyte handling toward sodium and water retention at the expense of magnesium conservation. This mirrors the magnesium loss seen in the luteal phase of natural menstrual cycles but occurs continuously rather than cyclically. Low magnesium compounds mood symptoms and sleep disturbance already associated with hormonal contraceptive use.

Onset: Months

Muscle cramps especially in calves at nightAnxiety or feeling on edge without clear triggerHeadaches or migraines that started after beginning the medicationDifficulty falling asleep despite feeling tiredHeart palpitations or awareness of heartbeat at rest

Zinc

Low-Moderate

Levonorgestrel redistributes zinc from serum into hepatic metallothionein storage, lowering circulating bioavailable zinc while simultaneously increasing copper levels. According to 68 curated disease associations for levonorgestrel in CTD, this zinc-copper imbalance is a recognized endocrine disruptor effect of progestins. Elevated copper-to-zinc ratio has been independently associated with mood disturbance, anxiety, and hormonal sensitivity. Zinc is also essential for immune function, wound healing, and thyroid hormone conversion — areas where levonorgestrel users may notice subtle functional decline.

Onset: Months

Getting sick more often with slow recovery from coldsAcne or skin changes that worsen despite the contraceptiveHair thinning or increased sheddingLoss of taste or smell sensitivityWhite spots appearing on fingernails

Vitamin C

Low

Levonorgestrel increases oxidative stress through progesterone-mediated metabolic shifts, accelerating vitamin C consumption as an antioxidant defense. Across 1,715 disease associations in CTD for levonorgestrel, the oxidative burden of continuous hormonal exposure depletes ascorbic acid reserves that protect blood vessels, support collagen synthesis, and enhance iron absorption. This depletion develops gradually and compounds with other antioxidant losses (vitamin E), creating cumulative oxidative vulnerability in long-term users.

Onset: Months

Easy bruising from minor bumpsSlow wound healing from cuts or scrapesGums that bleed when brushing teethDry and rough skin despite adequate hydrationFatigue and general malaise that builds over time

Vitamin E

Low

Levonorgestrel increases hepatic vitamin E catabolism through CYP-mediated oxidation pathways. As the primary fat-soluble antioxidant, vitamin E is consumed at increased rates when progesterone receptor activation elevates lipid peroxidation throughout cell membranes. According to 223 gene interactions for levonorgestrel in CTD, antioxidant defense gene networks are significantly represented. The combined depletion of vitamins C and E reduces total antioxidant capacity, potentially contributing to the vascular endothelial dysfunction that underlies the small but measurable increase in thrombotic risk associated with hormonal contraceptives.

Onset: Months

Dry skin that doesn't respond to topical moisturizersMuscle weakness or cramping during exerciseVisual disturbances or night vision problemsNerve tingling in extremitiesFeeling cold easily or poor circulation in hands and feet

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[02]

How It Causes Depletions

Levonorgestrel is a synthetic progestin prescribed across multiple delivery systems — the Mirena and Kyleena intrauterine devices, Plan B emergency contraception, and combined oral contraceptive pills — reaching approximately 2 million Mirena IUD insertions annually in the United States alone, plus substantial oral contraceptive market share. According to ChEMBL mechanism-of-action data, levonorgestrel functions as a progesterone receptor agonist that suppresses ovulation, thickens cervical mucus, and thins the endometrial lining. With 100% oral bioavailability, 98.25% protein binding, a 40-hour elimination half-life, and peak plasma concentration at 60 hours for IUD formulations, levonorgestrel delivers sustained hormonal exposure that profoundly alters metabolic enzyme activity across B-vitamin, mineral, and antioxidant pathways. The 7 nutrient depletions are not incidental side effects but direct downstream consequences of progesterone receptor activation across 223 gene interactions cataloged in CTD.

The Comparative Toxicogenomics Database documents 1,715 disease associations and 68 curated disease links for levonorgestrel, reflecting the breadth of metabolic disruption from continuous synthetic progestin exposure. Vitamin B6 depletion is the most clinically impactful because pyridoxal phosphate is the rate-limiting cofactor for serotonin and dopamine synthesis — the neurotransmitters most directly responsible for mood, motivation, and emotional resilience. Folate depletion carries unique reproductive urgency: women discontinuing levonorgestrel to conceive face a critical window where depleted folate stores must be repleted before conception to prevent neural tube defects. Across 1,527 PubMed-indexed articles on levonorgestrel, the B6-folate-B12 triad depletion creates overlapping methylation pathway impairment that elevates homocysteine, a cardiovascular risk marker that compounds the small baseline thrombotic risk already associated with hormonal contraceptives.

Magnesium and zinc depletions operate through electrolyte and metallothionein redistribution pathways. Levonorgestrel shifts renal magnesium handling and hepatic zinc sequestration in ways that lower circulating bioavailable levels of both minerals. Across 109 randomized controlled trials involving 269,064 patients in levonorgestrel research indexed by CTD, the zinc-copper ratio imbalance — where zinc drops while copper rises — is a recognized contributor to mood disturbance, anxiety, and immune dysfunction that many women attribute to the hormonal contraceptive itself rather than to a correctable mineral deficit. Vitamin C and E depletions reflect increased antioxidant consumption from progesterone-mediated oxidative stress. Across 212 million rows in Kelda's database, levonorgestrel's 7-nutrient depletion profile matches the broader oral contraceptive class pattern but with higher sustained exposure from IUD delivery systems that maintain continuous progesterone receptor activation without the cyclical pill-free intervals that oral formulations provide.

[03]

Symptoms to Watch For

Mood swings or irritability that worsened after starting the medicationLow-grade depression that doesn't fully respond to lifestyle changesNumbness or tingling in hands and feetDifficulty concentrating or brain fog during the dayPMS symptoms that intensify despite hormonal contraceptionPersistent fatigue that doesn't improve with more sleepMouth sores or a swollen tongue that recursPale skin or feeling lightheaded when standingDifficulty remembering names or finding wordsAnxiety that emerged or worsened on the medicationFatigue that worsens gradually over monthsPins-and-needles sensation in hands or feetEpisodes of dizziness or balance problemsMemory lapses that feel unusual for your ageA smooth or burning tongueMuscle cramps especially in calves at nightAnxiety or feeling on edge without clear triggerHeadaches or migraines that started after beginning the medicationDifficulty falling asleep despite feeling tiredHeart palpitations or awareness of heartbeat at restGetting sick more often with slow recovery from coldsAcne or skin changes that worsen despite the contraceptiveHair thinning or increased sheddingLoss of taste or smell sensitivityWhite spots appearing on fingernailsEasy bruising from minor bumpsSlow wound healing from cuts or scrapesGums that bleed when brushing teethDry and rough skin despite adequate hydrationFatigue and general malaise that builds over timeDry skin that doesn't respond to topical moisturizersMuscle weakness or cramping during exerciseVisual disturbances or night vision problemsNerve tingling in extremitiesFeeling cold easily or poor circulation in hands and feet

Levonorgestrel-induced nutrient depletions develop over months, creating a slowly evolving symptom pattern that many women and their prescribers attribute to hormonal side effects rather than correctable nutrient deficiencies. B6 depletion and zinc-copper imbalance are the most likely culprits behind mood changes, while magnesium loss drives the muscle cramps and sleep disturbance that worsen over time. The 7-nutrient depletion pattern means symptoms overlap and compound — fatigue from B12 and folate depletion layers on top of sleep disruption from magnesium loss, creating a cumulative burden that accelerates with years of continuous use. Testing and targeted supplementation can address each pathway independently.

[04]

What to Monitor

Request these at your next appointment. Check the ones you want to remember.

Serum B6 PLP (>20 nmol/L)

Pyridoxal 5-phosphate (PLP) is the only accurate measure of functional B6 status. Standard serum B6 tests miss tissue depletion. Low PLP directly impairs serotonin and dopamine synthesis, making this the most important marker for levonorgestrel users experiencing mood changes. Test at baseline and every 6-12 months during continuous use. Supplement with P5P (pyridoxal-5-phosphate) 25-50mg daily rather than pyridoxine, which requires hepatic conversion that hormonal contraceptives impair.

RBC Folate (>400 ng/mL)

RBC folate reflects tissue stores over the past 3 months, unlike serum folate which fluctuates with recent dietary intake. Critical to test and optimize before discontinuing levonorgestrel for conception — neural tube closure occurs by day 28, often before pregnancy is confirmed. Target above 400 ng/mL with methylfolate (5-MTHF) 800mcg daily rather than folic acid, which requires MTHFR enzyme conversion that 40% of the population has genetically reduced capacity for.

Serum Zinc (80-120 mcg/dL)

Serum zinc combined with serum copper reveals the copper-to-zinc ratio that levonorgestrel disrupts. A copper-to-zinc ratio above 1.4 is associated with mood disturbance and anxiety. Zinc supplementation (15-30mg daily with food) can rebalance this ratio, but must be accompanied by small amounts of copper (1-2mg) if taken long-term to prevent iatrogenic copper deficiency.

Copper:Zinc Ratio (Balanced (0.7-1.0))

The copper-to-zinc ratio is a more clinically useful marker than either mineral alone for levonorgestrel users. Progestins raise copper while lowering zinc, creating an imbalanced ratio linked to anxiety, mood instability, and immune suppression. Test both minerals simultaneously and calculate the ratio. Ratios above 1.4 warrant targeted zinc repletion under provider guidance.

Homocysteine (<8 µmol/L)

Homocysteine integrates B6, folate, and B12 status into a single functional marker. Elevated homocysteine (above 8 µmol/L) confirms methylation pathway impairment from the B-vitamin triad depletion that levonorgestrel causes. This is especially important because elevated homocysteine is an independent cardiovascular risk factor that compounds the small thrombotic risk already associated with hormonal contraceptives. Test annually during continuous use.

[05]

What vs Others

Name	Depletions	Potency	Notes
LevonorgestrelThis drug	7 nutrients	High	Synthetic progestin with 100% bioavailability, 40-hour half-life, available as IUD (Mirena/Kyleena), oral pill, and emergency contraception
Ethinyl Estradiol	7 nutrients	High	Synthetic estrogen component of combined oral contraceptives, depletes same nutrients through estrogen-mediated pathways
Etonogestrel	5 nutrients	Moderate	Implant-based progestin (Nexplanon), lower systemic levels than oral levonorgestrel, fewer documented depletions

Levonorgestrel and ethinyl estradiol both deplete 7 nutrients, reflecting the broad metabolic impact of synthetic sex hormones on B-vitamin metabolism, mineral transport, and antioxidant systems. Etonogestrel in the Nexplanon implant depletes 5 nutrients at lower severity, likely because implant delivery produces lower peak systemic concentrations than oral dosing. According to 223 gene interactions cataloged in CTD for levonorgestrel, the progestin and estrogen depletion pathways are overlapping but not identical — combined pills deliver a double hit through both receptor systems simultaneously. IUD delivery (Mirena, Kyleena) produces primarily local progestin effects with lower systemic absorption, potentially reducing some depletion severity compared to oral formulations.

[06]

Food Sources for Depleted Nutrients

Food	Amount per Serving
Chickpeas (canned)	1.1mg per cup
Salmon (wild-caught)	0.9mg per 3oz
Chicken breast	0.5mg per 3oz
Banana	0.4mg per medium fruit
Potatoes (baked, skin on)	0.4mg per medium

Source: USDA Food Composition Database (658,209 food nutrient entries)

[07]

FAQ

[08]

References

[1]Comparative Toxicogenomics Database (CTD): 223 levonorgestrel gene interactions, 1,715 disease associations, 68 curated disease links (accessed April 2026)
[2]ChEMBL Database: Levonorgestrel classified as progesterone receptor agonist, 100% oral bioavailability, 40-hour half-life, 98.25% protein binding (accessed April 2026)
[3]PubMed: 1,527 indexed articles for levonorgestrel; 109 randomized controlled trials across 269,064 patients (accessed April 2026)
[4]FAERS Database: Adverse event reporting for levonorgestrel including mood changes, bleeding irregularities, and metabolic effects (accessed April 2026)
[5]Kelda Health Intelligence Platform: Cross-referenced analysis across 212 million rows integrating CTD, ChEMBL, FAERS, PharmGKB, and PubMed datasets (accessed April 2026)
[6]PharmGKB Database: Pharmacogenomic annotations for levonorgestrel including CYP enzyme interactions and metabolic pathway data (accessed April 2026)

This information is generated from peer-reviewed molecular databases including the Comparative Toxicogenomics Database (CTD), ChEMBL, and indexed PubMed research. It is not medical advice. Always consult your healthcare provider before making changes to your medications or supplements. See our methodology →

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