Open Community Question @TrailKnees_UT • 30-44F • 1000mg ER Dinner / 200mg Mg • Week 12

▲ 26 Helpful • 2 Peer Replies

Metformin ER 1000mg + Magnesium Glycinate 200mg (12 wks update): Prescribed for PCOS-related insulin resistance and persistent dawn fasting glucose hanging... — what worked for others here?

Prescribed for PCOS-related insulin resistance and persistent dawn fasting glucose hanging around 112 mg/dL. Initially took 500mg IR with breakfast and experienced severe mid-morning abdominal cramping and nausea. Switched to Metformin ER 1000mg taken strictly with my largest evening meal (protein and vegetable heavy, under 30g net carbs). To address lingering nocturnal calf spasms and mild constipation, I incorporated 200mg elemental magnesium glycinate, spaced exactly 2.5 hours after dinner right before bed to prevent any potential divalent cation binding or GI hypermotility. Fasting glucose over 12 weeks has stabilized at 88-94 mg/dL on my Dexcom G7, fasting insulin dropped from 16 to 7.8 uIU/mL, and my morning dawn effect spikes flattened out completely. Zero nausea or loose stools remaining.

⚕ Pinned FDA / NIH / PubMed Clinical Context • Nourhan Mansour — Literature & Label Auditor

Food increases the extent of Metformin ER absorption by nearly 50% while blunting Cmax spikes. Separating divalent cation minerals like magnesium by at least two hours prevents competitive interference with gastrointestinal absorption and intestinal transit dynamics.

Connected Clinical Guides: Condition: Type 2 Diabetes Condition: Diabetes Type 2 Condition: Prediabetes Rx: Metformin Rx: Metformin Hcl Rx: Tirzepatide Supplement: Vitamin B12 Supplement: Magnesium Glycinate Supplement: Berberine

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Verified Peer Replies (2)

@NightShiftNurse_MN • Verified Cohort Member • Week 26

Spacers between metformin and divalent cations (magnesium, calcium, iron) are a smart clinical habit. Separating them by over two hours prevents any competitive transport interference in the small intestine while avoiding additive bowel-stimulating effects.

@SunbeltGardener_FL • Age 60+ • Week 20

Spacing magnesium by 2 hours at bedtime makes a noticeable difference. Combining evening dinner ER with late magnesium eliminated my muscle cramps and kept my morning glucose under 100 mg/dL consistently.