Calming magnesium form, take in the evening to wind down
Pinned to evening, the best window for Magnesium Glycinate.
Calming magnesium form, take in the evening to wind down
Calming form of magnesium; supports wind-down. Best window is evening, optional food. Educational only, not medical advice.
Magnesium is a cofactor for ~300 enzymes, including those that build ATP, regulate nerve and muscle excitability, and synthesize GABA. Magnesium bisglycinate (often shortened to glycinate) binds magnesium to two glycine molecules, an amino acid that itself promotes calm, the combination is highly absorbable and gentle on the gut. Subclinical magnesium insufficiency is common because modern diets are low in leafy greens and seeds.
Calming form of magnesium with high bioavailability and low GI side effects. Common evening sleep-support pick.
Evening, 30 to 60 minutes before bed. Glycine's mild calming effect and magnesium's role in GABA synthesis make it a natural wind-down stack. Take it with or without food, glycinate absorbs reliably either way. If you also take calcium or zinc, separate them from magnesium by a few hours, they compete for the same divalent-cation transporters. If your reason for taking magnesium is daytime cramping or migraine prevention, splitting morning and evening doses is fine.
| Window | Fit | Note |
|---|---|---|
| Morning | Poor | Calming effect works against the day |
| Midday | Okay | Fine if the preferred window is not possible |
| Evening, 1-2h before bed | Best | Aligns with winding down |
Tap each to see why.
Generally fine together; some prefer to split for tolerance.
Both support wind-down, common bedtime pairing.
Magnesium supports vitamin D metabolism.
Minerals compete for transporters, space them apart.
Calming combination before bed.
Generally fine together; split for tolerance if needed.
Often discussed together for electrolyte balance.
Take together
Glycinate (or bisglycinate) for sleep, cramping, anxiety, and general use, no GI side effects at typical 200 to 400 mg elemental doses. Citrate is fine for general use and helps with constipation, intentionally mild laxative effect. Malate is sometimes used for daytime energy and fibromyalgia. Threonate is the only form that meaningfully crosses the blood-brain barrier, used specifically for cognitive support. Avoid oxide unless cost is the only consideration, it is poorly absorbed (~4 percent).
| Form | Notes |
|---|---|
| capsule | Standard delivery, neutral taste. |
| powder | Flexible dose, ideal when scaling up gram-level intake. |
Who takes it: People with trouble falling asleep, frequent muscle cramps, migraine sufferers (preventive evidence is reasonable), people on PPIs or diuretics (both deplete magnesium), people with type 2 diabetes (often low), and athletes who sweat heavily. Skip if you have severe kidney disease without clinician supervision.
Glycinate for sleep and tolerance, citrate for general use, oxide is cheap but poorly absorbed.
Vitamin D3
Fat-soluble; pair with a meal containing fat for better absorption.
Glycine
Supports sleep onset; take ~30 minutes before bed.
L-Theanine
Often paired with caffeine in the morning or used to wind down.
Zinc
Can cause nausea on an empty stomach; space from calcium and iron.
Vitamin B12
Energy-supportive; take earlier in the day.
On the science
The principles behind this guidance, solubility, circadian timing, and spacing, are explained on our science page.
OptimalNourish is strictly educational. We do not recommend dosages, diagnose conditions, or suggest treatments. Always consult a qualified healthcare professional before changing your supplement routine.
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