Frequently Asked Questions
What is magnesium spray?
Topical magnesium spray made with pharmaceutical-grade magnesium chloride (USP). You spray it directly on your skin, where it absorbs transdermally (through the skin) into your bloodstream. Unlike pills that go through your digestive system, topical application bypasses your gut entirely—which matters if you have digestive issues or if oral magnesium upsets your stomach.
Why magnesium matters:
Magnesium is involved in 700-800 enzymatic functions in your body. That includes muscle and nerve function, blood glucose control, blood pressure regulation, protein synthesis, energy production, and sleep regulation. Around 70-80% of people are magnesium deficient—and it's getting worse.
Why we created this:
I grew up with severe allergies and asthma. Stress, poor sleep, and constant physical tension made everything worse. My body was always on high alert, muscles tight, never fully resting. Magnesium changed that. It's not just for allergy sufferers—anyone dealing with stress, poor sleep, muscle tension, or constant "on edge" feelings needs this mineral. We made it topical because your skin absorbs it efficiently, and you can target specific areas.
Magnesium Topical Spray 12oz (Extra Strength)
What it does:
Delivers 45mg of magnesium per spray directly through your skin. Supports over 700-800 enzymatic functions: muscle relaxation, nervous system regulation, stress reduction, sleep quality, post-workout recovery, and more.
What's in it:
100% pharmaceutical grade magnesium chloride (USP grade). No fragrances, harsh chemicals, or added scents. Just pure magnesium.
Size & Price:
12oz bottle - $29.99
Comes with magnesium crystals pre-filled. You add water, shake until dissolved, and it's ready to use.
How long it lasts:
6+ months with regular use (10 sprays daily)
Concentration:
Extra strength formula: 45mg magnesium per spray. You can adjust concentration by adding more or less water based on your tolerance.
Best for:
- Daily magnesium maintenance
- Whole-body application
- People who use magnesium regularly and want better value
- Larger households or sharing between family members
- Those who apply to multiple areas (stomach, feet, arms, legs, back)
Magnesium 4oz
What it does:
Same formula as the bigger bottle—pharmaceutical grade magnesium chloride but delivering a lower concentration of 25mg per spray. Smaller size for trying it out, travel, or keeping multiple bottles in different locations.
What's in it:
100% pharmaceutical grade magnesium chloride (USP grade). No fragrances, harsh chemicals, or added scents.
Size & Price:
4oz bottle - $19.99
How long it lasts:
Several months with regular use (5-10 sprays daily)
Best for:
- First-time users wanting to try magnesium spray
- Travel bottle (4oz though not 3oz)
- Keeping one at work, one at home, one in gym bag
- Targeted application to specific areas
- Gift size
How Magnesium Spray Works
The science:
Magnesium chloride, when sprayed on skin, penetrates the epidermis and enters underlying tissues. From there, it absorbs into your bloodstream through transdermal absorption. Once in your bloodstream, magnesium plays crucial roles throughout your body.
Why topical instead of oral?
Better absorption for some people: If you have digestive issues, oral magnesium can be hard to absorb. Topical application bypasses the gut entirely, ensuring the mineral reaches your bloodstream.
No digestive side effects: Oral magnesium commonly causes diarrhea, stomach upset, or digestive discomfort. Topical application avoids this completely.
Targeted application: You can spray directly on sore muscles, tense areas, or cramping spots for localized benefits.
Convenient: No pills to swallow. No timing around meals. Just spray and go.
Absorption rate:
The soles of your feet have large pores, making them ideal for absorption. Stomach, arms, legs, and back also absorb well. Thin-skinned areas absorb faster than thick-skinned areas.
What Magnesium Spray Supports
Sleep Quality
Magnesium regulates neurotransmitters like GABA, which has calming effects on the nervous system. This promotes relaxation and prepares your body for sleep. It also helps with muscle relaxation, which aids falling asleep—especially if you experience muscle tension at night.
How to use for sleep: Spray 10 times on stomach or feet 20-30 minutes before bed. Rub in and let air dry. Consistency matters—magnesium is most powerful for sleep when used nightly over time.
Muscle Relaxation & Recovery
Magnesium is essential for proper muscle contraction and relaxation. It helps reduce cramps, soreness, and tension. Athletes use it post-workout to speed recovery. People with chronic tension use it daily for relief.
How to use for muscles: Spray directly on sore muscles, cramping areas, or tense spots (calves, thighs, back, shoulders, neck). Massage in. Apply after workouts or whenever you feel tightness. Keep a bottle in your car—spray immediately when cramps hit.
Stress & Anxiety Reduction
Magnesium supports the nervous system and helps regulate stress hormones. Low magnesium levels are associated with increased anxiety. Topical application creates a calming bedtime ritual and delivers the mineral your nervous system needs to stay balanced.
How to use for stress: Apply to stomach or arms during the day or evening. Use as part of a wind-down routine. The act of application itself becomes a calming pause.
Restless Legs Syndrome
Magnesium deficiency is linked to restless legs. Direct application to legs and feet before bed can help reduce that uncomfortable "need to move" sensation.
How to use for restless legs: Spray generously on legs and feet before bed. Massage in thoroughly.
Other Uses
Natural deodorant: 2-3 sprays under each arm on clean, dry skin. Let dry before dressing. Wait at least 12 hours after shaving to avoid irritation. Works by neutralizing odor-causing bacteria while delivering magnesium.
PMS & menstrual cramps: Apply to lower abdomen and lower back during menstrual cycle. Supports muscle relaxation and may help with cramps and discomfort.
Headaches & migraines: Some users apply to temples, neck, and shoulders. Magnesium deficiency is linked to migraines in some people.
How to Use
Step 1: Prepare the spray
Your bottle comes with magnesium crystals already inside. Fill to the top with water (tap water is fine). Recap and shake vigorously until crystals completely dissolve. Attach sprayer.
Step 2: Apply to clean skin
Spray 5-10 times on the desired area. Common application sites:
- Feet (especially soles—best absorption)
- Stomach (large surface area, good absorption)
- Arms and legs (convenient, good for targeted areas)
- Back and shoulders (good for muscle tension)
Step 3: Rub in and let dry
Massage the spray into your skin to encourage absorption. Let air dry—don't rinse immediately. For maximum absorption, leave on for 20-30 minutes before showering (though most people leave it on overnight or all day).
Step 4: Use consistently
Magnesium works best with regular use. Daily application over weeks allows your body to rebuild magnesium stores. You're not looking for an instant fix—you're supporting a foundational mineral your body needs constantly.
Adjusting concentration:
If the spray feels too strong (causes excessive tingling), add more water to the area to dilute it. If you want stronger concentration, add less water. Start with the bottle filled to the top, then adjust based on your response.
What to Expect
The Tingling/Itching Sensation
This is normal. Most people experience tingling, itching, or slight stinging when they first apply magnesium spray. This is widely recognized as a natural sign of magnesium deficiency—your body is pulling magnesium in rapidly.
What to do:
- It should subside with regular use as your magnesium levels improve
- If uncomfortable, rinse the area with water after 20 minutes (still allows absorption time)
- Start by applying to feet, which tend to be less sensitive
- Dilute the spray by adding more water to your bottle
- Apply to moistened skin rather than completely dry skin
The sensation typically decreases significantly after 1-2 weeks of consistent use.
Timeline for Results
Immediate (same day): Some people notice muscle relaxation and calming effects within hours of first application.
Within days: Sleep improvements often show up within 3-7 days. Muscle cramps may reduce noticeably.
Within weeks: Stress resilience, consistent energy levels, and overall tension reduction become more apparent.
Within months: Deep restoration of magnesium stores. Maximum benefits for sleep, stress, muscle function, and overall wellbeing.
Remember: Magnesium deficiency develops over time. Restoring levels also takes time. Consistency matters more than any single application.
Safety & Considerations
Who can use it?
Most people can safely use topical magnesium. It's generally well-tolerated and bypasses the digestive issues associated with oral supplementation.
Who should be cautious?
- People with kidney disease or impaired kidney function (difficulty processing magnesium)
- Those taking certain medications (antibiotics, heart medications—check with your doctor)
- People with very sensitive skin (test small area first)
- Pregnant or nursing women (consult healthcare provider first)
Avoid:
- Freshly shaved skin (wait at least 12 hours after shaving)
- Open wounds or broken skin
- Sensitive mucous membranes
- Eyes and face (unless specifically applying for headaches—use caution)
Can you use too much?
The kidneys control magnesium homeostasis, filtering the blood and excreting any excess the body does not need. Consequently,magnesium overdose from topical application is extremely rare—unlike oral or intravenous sources, which can sometimes lead to high levels in susceptible individuals Start with 5-10 sprays daily and increase gradually if needed.
Drug interactions:
Magnesium can interact with certain medications. Check with your doctor if you take:
- Antibiotics (tetracyclines, quinolones)
- Bisphosphonates (osteoporosis drugs)
- Diuretics
- Heart medications
- Proton pump inhibitors
- Or anything other medication.
Storage:
Store at room temperature away from direct sunlight. Keep tightly closed when not in use. Keep out of reach of children.
Magnesium & Allergies/Asthma
Why magnesium matters for allergy sufferers:
Stress exacerbates allergies and asthma. When you're stressed, your body is on high alert—your immune system overreacts, inflammation increases, and you become more reactive to triggers. Magnesium supports stress reduction and nervous system regulation, which indirectly supports better management of allergies and asthma symptoms.
The connection:
- Low magnesium levels have been associated with increased asthma symptoms
- Magnesium helps with inflammation, and asthma is an inflammatory condition
- Poor sleep makes allergies worse—magnesium supports sleep quality
- Muscle tension (including respiratory muscles) worsens during stress—magnesium relaxes muscles
Not a replacement for treatment:
Magnesium spray is not an asthma or allergy treatment. It supports foundational wellness—sleep, stress management, muscle function—which affects how your body handles everything, including allergen exposures. Always follow your doctor's treatment plan for allergies and asthma.
Choosing Between Sizes
Get the 4oz if:
- You're trying magnesium spray for the first time
- You want a travel size (4oz though, not 3oz)
- You're targeting only one specific area (like feet for sleep)
- You want to test your tolerance before committing to a larger size
- You want multiple bottles in different locations
Get the 12oz if:
- You've tried magnesium spray and know you like it
- You're applying to multiple areas or your whole body
- You want the best value per ounce
- You're using it for the whole family
- You use it daily and don't want to reorder frequently
Value comparison:
12oz = better cost per ounce for regular users
4oz = lower upfront cost for testing or specific uses
Frequently Asked Questions
Is this actually oil?
No. "Magnesium oil" is a common term, but it's not an oil—it's a water-based solution. When magnesium chloride dissolves in water, it feels slightly oily or slippery on your fingers, which is why people call it "oil." It won't stain clothes and isn't greasy.
Will it stain my clothes?
No. Let it dry before dressing, and you're fine. The solution is clear and water-based. But if you have any concerns, always colorfast test first.
Can I shower after applying?
Yes, but wait 20-30 minutes first to allow maximum absorption. Most people apply before bed and shower in the morning, or apply after a shower.
Can I use this on my face?
It's not ideal for use on the face. Some people use it for tension headaches on the back of the neck.
Can kids use this?
Yes, but start with smaller amounts and more diluted concentration. Consult your pediatrician for appropriate use in children.
How does this compare to Epsom salt baths?
Epsom salts (magnesium sulfate) require a bath and deliver a different form of magnesium. Magnesium chloride spray absorbs more readily through skin, works faster, and is far more convenient. You can use it daily without needing a 20-minute bath. Sprays are better for targeted areas and daily maintenance.
How does this compare to oral magnesium supplements?
Topical advantages:
- Bypasses digestive system (no stomach upset or diarrhea)
- Targeted application to specific areas
- Immediate localized benefits for muscles
- Better for people with digestive issues
Oral advantages:
- May raise systemic magnesium levels more significantly
- Easier for some people (just swallow a pill)
Many people use both: Oral for systemic levels, topical for targeted relief and sleep support.
What if I'm already taking oral magnesium?
You can use both. Topical magnesium provides localized benefits and bypasses digestive absorption issues. Check with your doctor to ensure you're not exceeding safe levels (though excess topical magnesium is rare).
Does this really work or is it placebo?
Research on transdermal magnesium is mixed. Some studies show benefits; others are inconclusive. What we know: magnesium is essential for the body, many people are deficient, and thousands of customers report improved sleep, reduced muscle tension, and stress relief. Whether it raises systemic magnesium levels as much as oral supplementation is debated—but the localized benefits for muscles and the ritual of application clearly help many people.
USP grade—what does that mean?
United States Pharmacopeia grade. It means our magnesium chloride meets or exceeds the purity standards set by the USP. This is pharmaceutical-grade quality—the same standard used for medications. You're getting clean, pure magnesium, not industrial-grade material.
Combining Magnesium with Other Allergy Defender Products
Magnesium + Allergen Spray:
Perfect combination. The spray reduces environmental allergens in your living space. Magnesium supports your body's stress response and sleep quality—both of which affect how you handle allergen exposures. Less stress + better sleep = more resilient body = better allergen tolerance.
Magnesium + Supplements (EnviroDefender, HistaDefender, DetoxDefender):
Excellent pairing. Supplements support how your body processes allergens and histamine internally. Magnesium addresses foundational wellness—sleep, stress, muscle tension. These are complementary strategies. Poor sleep and high stress make you more reactive to everything. Magnesium tackles that piece.
Complete system approach:
Many customers use all of it together:
- Allergy Asthma Clean Allergen Spray by Allergy Defender reduces what's in your environment
- Supplements support internal processing of triggers
- Magnesium restores sleep and reduces stress
- Together: comprehensive support from multiple angles
Pricing & Ordering
Magnesium 4oz: $19.99
Magnesium 12oz: $29.99 (better value per ounce)
Subscriptions:
Available for auto-refill. Never run out. Can be skipped or cancelled anytime.
Shipping:
Free shipping to contiguous United States.
Guarantee:
30-day risk-free guarantee. If you're not satisfied, contact customer support.
The Allergy Defender Story
I nearly died from an allergy-induced asthma attack when I was five. My father, a chemist, formulated our mineral-based allergen spray to give me my life back. But reducing environmental allergens was only part of the solution. Stress, poor sleep, and constant physical tension made everything worse. Magnesium changed that for me.
Magnesium isn't just for allergy sufferers—it's for anyone whose body is constantly tense, stressed, or struggling to rest. We made it topical because it works, it's convenient, and it bypasses all the digestive issues that make oral magnesium problematic for so many people.
This is part of our mission: giving people tools to reclaim their lives—whether that's reducing allergens in their space, supporting their internal systems with supplements, or helping their bodies finally rest with magnesium.
Tips for Success
1. Be consistent
Magnesium works best with daily use over time. One application won't fix years of deficiency. Commit to 2-4 weeks of consistent use.
2. Start with feet
They're less sensitive and have excellent absorption. Once you adjust to the sensation, expand to other areas.
3. Make it a ritual
Apply before bed as part of your wind-down routine. The consistency helps, and the act itself becomes a signal to your body that it's time to relax.
4. Combine with gratitude practice
After applying magnesium and getting into bed, think about things you're grateful for. This mental shift + magnesium's physical effects = better sleep.
5. Track your sleep
Notice patterns. Are you falling asleep faster? Sleeping deeper? Waking less? Track it so you can see the effects.
6. Don't give up during the tingly phase
It gets better. Push through the first week or two. Dilute if needed. The tingling means it's working—your body needs this mineral.
7. Use it after workouts
Spray on worked muscles immediately after exercise. Supports faster recovery and reduces soreness.
8. Keep a bottle in your car
For immediate cramp relief. Leg cramp while driving? Pull over, spray, rub in. Relief within minutes for many people.
Need Help?
Contact us: Use the "Let's Chat" feature or visit allergydefender.com/pages/customer-support.
Start simple: If unsure which size, start with the 4oz. If you love it, upgrade to 12oz for better value on your next order.