Why do I wake up at night and still feel tired?
Fragmented sleep — waking several times and never feeling rested — is frequently tied to an over-active nervous system at night. Magnesium acts as a natural “brake” on that system: it supports GABA, the calming neurotransmitter that helps you wind down, and it helps regulate the stress hormone cortisol. When magnesium is low, the nervous system stays more excitable, which shows up as trouble staying asleep and that tense, unable-to-switch-off feeling at bedtime.Why do my legs and calves cramp at night?
Muscles need magnesium to relax after they contract. Calcium drives contraction; magnesium balances it and allows the muscle to release. When magnesium is low, muscles are slower to let go, which is why night-time leg and calf cramps, foot cramps, and even eyelid or muscle twitches are classic signs of inadequate magnesium. The same deficiency that disturbs your sleep can be what’s cramping your legs — which is why the two so often happen together.How do I know if I’m low on magnesium?
Magnesium is involved in over 300 enzymatic reactions in the body, so a shortfall shows up in many ways at once. Common signs include muscle cramps and twitches, poor or restless sleep, anxiety and feeling on edge, low energy or fatigue, and tension headaches. Up to half of adults don’t get enough magnesium from diet alone, and stress, intense exercise, and certain medications deplete it faster. A blood test only captures a small fraction of your body’s magnesium, so symptoms are often the more useful signal — but persistent or severe symptoms always warrant a doctor’s visit to rule out other causes.Which type of magnesium is best for sleep and cramps?
Not all magnesium is the same, and this is where many single-form supplements fall short:- Glycinate — the most recommended form for sleep and calm; gentle on digestion.
- Malate — associated with energy and muscle recovery.
- Citrate — well-absorbed and supports metabolism and regularity.
- Oxide — high in elemental magnesium; also studied for migraines.
- Hydroxide — supports digestion.
How Spectrum 5 fits
Spectrum 5 Magnesium Complex combines all five of those forms — glycinate, malate, citrate, oxide, and hydroxide — at 500mg per serving, plus marine-sourced Aquamin minerals that add over 72 trace minerals. The glycinate component is specifically associated with sleep, while the broad blend supports the muscle relaxation that helps prevent night-time cramps. It’s GMP-certified, made in the USA, and third-party tested. It isn’t a sedative and isn’t habit-forming — it works by correcting a shortfall and supporting your body’s natural pathways.How to take it and when to expect results
For sleep, take it 30–60 minutes before bed; for muscle recovery, within about 30 minutes after exercise; for general support, any consistent time with food works best for absorption. Most people notice sleep and relaxation improvements within 1–2 weeks, with fuller benefits over 4–6 weeks of daily use. See benefits for sleep and benefits for muscles for more.When to talk to a doctor
A 2-capsule serving delivers 500mg, which is above the 350mg upper limit set for supplemental magnesium, so check with your doctor before taking more than the serving size. People with chronic kidney disease should not supplement magnesium without medical supervision, and you should separate magnesium from certain antibiotics and tell your prescriber if you take blood-pressure medication. If cramps or sleep problems are severe, sudden, or persistent, see a healthcare provider to rule out other causes.Related: Spectrum 5 Overview · Magnesium Types Guide · Benefits for Sleep · Benefits for Muscles · FAQ