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You’re eating reasonably well. You’re exercising. You’re trying to get enough sleep. But something still feels off – maybe your muscles cramp for no reason, or you lie awake at 2am staring at the ceiling, or you feel anxious without anything to be anxious about.
What if it’s not stress, or ageing, or “just how things are”? What if your body is simply running low on one mineral that affects over 300 processes in your body – and you have no idea?
Magnesium deficiency is one of the most common nutritional gaps in the world. An estimated 2.4 billion people globally – roughly 31% of the population – don’t get enough of it. In Asia, the numbers are even higher, with studies showing that over 64% of adults in the region consume below the estimated average requirement.
The tricky part? Magnesium deficiency rarely shows up on standard blood tests because only 1% of your body’s magnesium is in your blood. The rest is in your bones, muscles, and cells – where it does its actual work. So you can be significantly deficient without your bloodwork flagging anything.
Here are the seven signs your body might be telling you something.
This is the sign most people recognise – that sudden calf cramp at night, an eyelid that won’t stop twitching, or legs that feel like they need to move constantly when you’re trying to sleep.
Magnesium regulates calcium flow into muscle cells. When magnesium is low, calcium enters muscle cells unchecked, causing them to contract when they shouldn’t. The result is involuntary cramping, twitching, or that restless uncomfortable feeling in your legs at night.
This is particularly common in Singapore because of the tropical climate. You lose magnesium through sweat, and in Singapore’s humidity, you’re sweating significantly more than people in cooler climates – even if you don’t notice it. Runners and active individuals are especially vulnerable because exercise compounds the loss.
What to do: For immediate targeted relief, apply BetterYou Magnesium Oil Original Spray directly to the muscles that cramp. The transdermal magnesium absorbs through the skin and reaches the affected area within minutes. For ongoing prevention, take Magnesium Bisglycinate capsules daily – bisglycinate is the most absorbable oral form and doesn’t cause the digestive issues that cheaper magnesium forms can.
You get seven or eight hours, but wake up feeling like you barely rested. Or you fall asleep fine but wake at 3am and can’t get back to sleep. Or it takes you 45 minutes of tossing before you drift off.
Magnesium plays a direct role in activating your parasympathetic nervous system – the “rest and digest” mode that your body needs to enter before sleep becomes possible. It also regulates melatonin production and binds to GABA receptors, the neurotransmitter responsible for calming brain activity.
When magnesium is low, your nervous system stays in a state of low-grade activation. You might not feel obviously wired, but your body isn’t shifting into the deep relaxation needed for restorative sleep.
What to do: Build a magnesium-based bedtime routine. Apply BetterYou Magnesium Sleep Lotion (which combines magnesium with lavender and chamomile) to your chest and shoulders 20 minutes before bed. The magnesium relaxes your muscles while the aromatherapy calms your mind. For children who struggle with bedtime, the BetterYou Kids Magnesium Sleep Lotion is paediatrician approved and contains gentle botanicals including oat extract and calendula — making it part of a calming bedtime ritual. Alternatively, the Kids Magnesium Sleep Spray works for quick application.
Pair topical magnesium with oral Magnesium Bisglycinate taken an hour before bed for both surface-level muscle relaxation and deeper systemic support.
You feel on edge without a clear reason. Small things irritate you more than they should. You might describe it as a general sense of unease – not full-blown anxiety, but a persistent low-level tension that won’t switch off.
Magnesium modulates the HPA axis (hypothalamic-pituitary-adrenal axis) – the system that controls your stress response. When magnesium is adequate, your body produces an appropriate amount of cortisol in response to stress and then brings it back down. When magnesium is low, cortisol stays elevated longer than it should, keeping you in a state of heightened alert.
Research published in 2023 found a significant association between magnesium supplementation and reduced symptoms of depression and anxiety. A 2024 systematic review confirmed benefits for people with mild anxiety and insomnia.
This creates a vicious cycle: stress depletes magnesium, and low magnesium amplifies your stress response — which depletes magnesium further. You can read more about how cortisol and stress hormones affect your body and the role of the gut-brain axis in mental wellbeing.
What to do: Address both the magnesium deficiency and the stress cycle. Magnesium Bisglycinate crosses the blood-brain barrier more effectively than other forms, making it the best choice for mood and anxiety support. For a comprehensive approach, consider combining it with PS128 and PS23 psychobiotics – PS23 has been clinically shown to reduce cortisol levels, which complements magnesium’s calming effects on the nervous system.
You read the same email three times and still can’t absorb it. You walk into a room and forget why. Conversations feel like they’re happening through a filter. You know you’re capable of sharp thinking – it just isn’t happening.
Magnesium is essential for synaptic plasticity – the brain’s ability to form and strengthen connections between neurons. It also regulates NMDA receptors, which are critical for learning, memory formation, and sustained attention. When magnesium levels drop, these processes slow down, and the subjective experience is mental fog.
This is especially relevant if you work in a high-pressure office environment in Singapore, where most of the population already struggles with vitamin D deficiency — another nutrient that affects cognitive function. The combination of low magnesium and low vitamin D can compound brain fog significantly.
What to do: Start with Magnesium Bisglycinate daily and check your vitamin D status. For a complete focus and concentration approach, consider adding Efamol Efalex Brain Formula for DHA (the brain’s structural fatty acid) and PS128 for dopamine support through the gut-brain axis.
Your joints feel stiff in the morning. Your body aches after sitting for too long. Recovery from exercise takes longer than it used to. You might chalk it up to ageing, but magnesium deficiency can make these symptoms worse — or even cause them.
Magnesium has anti-inflammatory properties and helps regulate calcium deposition. When magnesium is low, calcium can deposit in soft tissues and joints rather than in bones where it belongs, contributing to stiffness and discomfort. Magnesium also supports the production of joint lubricating compounds and helps muscles around joints relax properly.
What to do: Apply BetterYou Magnesium Oil Joint Spray directly to stiff joints. It combines magnesium chloride with glucosamine for targeted joint support. For post-exercise recovery, BetterYou Magnesium Gel provides concentrated, sustained-release magnesium specifically designed for before and after physical activity. Combining topical with oral magnesium and omega-3 supplements for systemic anti-inflammatory support creates a comprehensive joint care approach.
For women going through perimenopause or menopause, magnesium deficiency can intensify symptoms that are already challenging – particularly hot flushes, sleep disruption, mood swings, and anxiety.
Magnesium helps regulate oestrogen metabolism and supports the nervous system transitions that happen during hormonal changes. When magnesium is adequate, the body handles these shifts more smoothly. When it’s depleted — which stress, poor sleep, and ageing all contribute to — every hormonal symptom amplifies.
Studies have also shown a connection between magnesium status and PMS severity. Women with lower magnesium levels tend to experience more intense cramps, bloating, and mood changes in the days before their period.
What to do: The BetterYou Magnesium Menopause Spray is specifically formulated for this — combining magnesium chloride with ylang-ylang and clary sage essential oils that support hormonal balance. It’s GenM certified (a menopause-friendly product certification) and can be used alongside oral magnesium for comprehensive support. For PMS and general women’s health, Efamol Evening Primrose Oil provides GLA that further supports hormonal balance. Read more about supplements for women’s health.
You slept eight hours. You ate well. You didn’t overexert yourself. And yet, by 2pm, you feel exhausted. Not sleepy exactly – just drained.
Magnesium is required for ATP production — adenosine triphosphate, the molecule your cells use as energy. Every cell in your body needs magnesium to produce and use energy. When magnesium is insufficient, energy production at the cellular level becomes less efficient, and you feel it as a persistent, unexplained tiredness that rest doesn’t fix.
This is different from the tiredness caused by poor sleep (sign #2). Sleep-related fatigue improves when you sleep better. Magnesium-related energy depletion persists even when sleep is adequate because the issue is at the cellular metabolism level.
What to do: Oral Magnesium Bisglycinate is the priority here since systemic magnesium levels need to increase for cellular energy production to improve. For a relaxing boost, BetterYou Magnesium Body Lotion with shea butter, coconut oil and vitamin E provides transdermal magnesium alongside skin nourishment – a daily moisturising routine that doubles as supplementation. BetterYou Magnesium Bath Flakes are another option — a 20-minute magnesium bath after a long day helps both energy restoration and muscle recovery.
Several factors specific to life in Singapore compound the risk of magnesium deficiency.
Tropical heat and humidity. You lose magnesium through sweat. Even non-exercising adults in Singapore sweat more than people in temperate climates simply from the environmental heat. Air-conditioned environments reduce sweating but also reduce the thirst signal that prompts fluid and electrolyte intake.
High-stress culture. Singapore’s demanding work environment means chronically elevated cortisol, which directly depletes magnesium stores. The more stressed you are, the faster you lose magnesium — and the more you need it.
Processed food prevalence. Hawker centre and convenience meals, while delicious and practical, are often low in magnesium-rich foods like dark leafy greens, nuts, and whole grains. Modern food processing strips magnesium from many ingredients.
Indoor lifestyle. As we covered in our vitamin D deficiency article, most Singaporeans spend the vast majority of their time indoors. This limits not just vitamin D production but also exposure to magnesium-rich whole foods that outdoor, agrarian lifestyles naturally provide.
Not all magnesium supplements are the same. Choosing the right form depends on your primary symptoms.
For sleep and anxiety: Magnesium Bisglycinate capsules (oral, crosses blood-brain barrier) plus BetterYou Sleep Spray or Sleep Lotion (topical, with lavender)
For muscle cramps and general deficiency: BetterYou Magnesium Oil Original Spray (fast topical relief) plus Bisglycinate capsules (systemic support)
For sports recovery: BetterYou Magnesium Gel (concentrated, sustained release for pre/post workout)
For joint stiffness: BetterYou Magnesium Joint Spray (magnesium + glucosamine, targeted application)
For menopause symptoms: BetterYou Magnesium Menopause Spray (magnesium + ylang-ylang and clary sage)
For children’s sleep: BetterYou Kids Sleep Spray or Kids Sleep Lotion (paediatrician approved, ages 1+)
For relaxation and skin care: BetterYou Magnesium Body Lotion (shea butter + coconut oil + magnesium)
Browse the full range of magnesium products to find the right format for your needs.
How do I know if I’m magnesium deficient?
Standard blood tests only measure serum magnesium (1% of total body magnesium), so they often miss deficiency. The most practical approach is to assess your symptoms — if you have two or more of the signs listed above, magnesium supplementation is worth trying. You can also request a red blood cell (RBC) magnesium test from your doctor, which gives a more accurate picture than standard serum tests.
How much magnesium do I need daily?
The recommended daily allowance is approximately 400-420mg for adult men and 310-320mg for adult women. However, people under chronic stress, those who exercise regularly, or those living in tropical climates like Singapore may need more. Most studies showing clinical benefits use doses of 200-400mg of elemental magnesium from supplements, in addition to dietary intake.
Can I take too much magnesium?
Magnesium from food is safe in any amount because your kidneys efficiently remove the excess. From supplements, extremely high doses (above 5,000mg) can cause loose stools – which is actually the body’s natural way of indicating it has enough. Magnesium bisglycinate and transdermal forms are the least likely to cause this effect. If you experience loose stools, simply reduce the dose.
How long does it take to correct magnesium deficiency?
Most people notice improvements in sleep quality and muscle cramps within 1-2 weeks. Anxiety and mood improvements typically take 2-4 weeks. Full replenishment of magnesium stores can take 4-6 weeks of consistent daily supplementation.
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