Magnesium Oil Spray — Dead Sea Magnesium Chloride, Ready to Use
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Greenway Biotech · Made in California since 1989
Dead Sea magnesium chloride.
Ready to spray, no mixing.
A pre-formulated topical magnesium chloride spray, mixed at a precise 1:1 ratio with reverse-osmosis filtered water — about 10 mg of elemental magnesium per spray. A popular addition to evening wind-down routines and post-activity body care. Spray on feet, legs, or shoulders; massage in; carry on with your day.
Find your size → See how to use itShips from California · 90-day guarantee · For external use only
1:1ratio
MgCl₂ to RO water
~10mg
Elemental Mg per spray
~1,800sprays
Per 8 oz glass bottle
35+yrs
Family-owned in California
01 / Choose your size
Right-sized for your routine.
Durations below assume daily topical use. The 8 oz bottle holds roughly 1,800 sprays — at 20 sprays a day, about three months; at 40 sprays a day, about six weeks.
| Size | Typical Duration | Sprays per Bottle | Best For |
|---|---|---|---|
| 8 oz | ~90 days at 20 sprays/day | ~1,800 sprays | Standard glass bottle |
| Product Type | Ready-to-use topical magnesium chloride spray — for external use only |
|---|---|
| Size | 8 oz (237 ml) glass bottle with sprayer |
| Key Ingredient | Magnesium Chloride (USP), Dead Sea origin, in RO-filtered water |
| Formula Ratio | 1:1 — equal parts magnesium chloride to RO water by weight |
| Elemental Mg per Spray | ~10 mg |
| Source / Origin | Magnesium chloride sourced from the Dead Sea; bottled in Madera, California |
| Grade / Purity | USP-grade magnesium chloride active |
| Ingredients | Magnesium Chloride, Aqua (RO-filtered water) |
| Vegan | Yes — magnesium chloride and water only |
| Bottle Material | Glass — prevents reactivity with the magnesium chloride solution |
| Testing | Independently tested for heavy metals; results consistently well below required limits |
| Safety | For external use only. Start on the feet; patch test sensitive areas. |
02 / Ideal for
One spray.
Many moments.
Designed for people who want fast, no-mix topical magnesium they can apply exactly where and when they want it.
Evening Wind-Down
10-20 sprays on the soles of the feet or calves 20-30 minutes before bed is a popular way to fold magnesium into a nightly routine.
After Activity
Spray directly onto tired or tight areas after exercise. The targeted spray reaches a specific muscle group without a full bath or a cream.
Pulse-Point Ritual
A few sprays on the inner wrists or back of the neck as part of an evening wind-down — a small, sensory cue to slow down.
Post-Workout
Popular among active people for spraying onto fatigued legs, arms, and shoulders after training, when the skin is clean and warm.
Sensitive Stomachs
A topical option for people who experience digestive discomfort with higher-dose oral magnesium and prefer to skip the digestive system.
No-Mix Convenience
Pre-formulated at a consistent 1:1 ratio — no measuring, no dissolving, no prep. Spray and go, at home or traveling.
03 / Why this one
Two ingredients.
Mixed with precision.
Magnesium chloride and filtered water — nothing else. The value is in the grade of the active, the precision of the ratio, and the glass it ships in.
1:1
A precise, consistent ratio.
Mixed at a 1:1 ratio — equal parts magnesium chloride to reverse-osmosis filtered water by weight. This is the standard concentration for topical magnesium oil, delivering about 10 mg of elemental magnesium per spray for predictable, repeatable use every time.
USP
Pharmaceutical-grade active.
The magnesium chloride is USP-grade — a purity standard with tighter impurity limits than industrial grades. The same Dead Sea raw material we sell in powder and bath-flake formats, here pre-dissolved and ready to spray.
🌊
Sourced from the Dead Sea.
Magnesium chloride refined from the mineral-dense brines of the Dead Sea — one of the most concentrated natural magnesium chloride sources on Earth, long valued for its rich mineral content.
🫙
Glass bottle — no plastic reactivity.
Concentrated magnesium chloride solutions can react with certain plastics and metals over time. The glass bottle prevents leaching and preserves the solution's integrity from the first spray to the last.
💡
Ready to use, no mixing.
Magnesium chloride powder needs measuring and dissolving. This spray arrives pre-formulated at a known concentration — consistent application with zero prep time, every single use.
⚗️
Tested for heavy metals.
Every batch is independently lab tested and screened for heavy metal content. Results are consistently well below required limits. We test because we believe in verifying quality, not just claiming it.
04 / The science
What "magnesium oil" really is — and what topical magnesium is not.
~10mg per spray
Elemental magnesium, 1:1 MgCl₂ solution
Despite the name, magnesium oil is not an oil. It is a highly concentrated solution of magnesium chloride in water that feels slightly slippery on the skin — which is where the "oil" nickname comes from. There is no oil in the formula: just magnesium chloride and reverse-osmosis filtered water at a 1:1 ratio by weight.
The chemistry behind the per-spray figure is fixed by molecular weight. Pure Magnesium Chloride Hexahydrate (MgCl₂·6H₂O) is about 11.96% elemental magnesium (24.305 g/mol Mg divided by 203.31 g/mol for the hexahydrate). At the 1:1 concentration and a typical spray volume, that works out to roughly 10 mg of elemental magnesium delivered per spray — which is how an 8 oz bottle holds approximately 17,700 mg of elemental magnesium across roughly 1,800 sprays.
Topical magnesium is applied directly to the skin, which is why many people reach for it as an alternative or complement to oral magnesium — it skips the digestive system entirely. The science on how much magnesium is absorbed through the skin (transdermal absorption) is actively studied and not fully settled. We position this as a topical body product, not a substitute for dietary magnesium or oral supplementation. What many shoppers value is the routine itself and the targeted, no-mix application.
For a deeper comparison of topical and oral magnesium, see Oral vs Transdermal Magnesium: Complete Guide.
Key Ingredients
Two ingredients. That is the entire formula.
Magnesium Chloride USP (MgCl₂)
The active wellness ingredient. USP-grade purity, Dead Sea sourced, ~12% elemental magnesium by weight. Highly soluble; pre-dissolved here at a 1:1 ratio.
Reverse-Osmosis Filtered Water (Aqua)
RO-filtered water is the carrier. Filtration removes dissolved minerals and contaminants for a clean, consistent base that keeps the solution stable in glass.
Full ingredients: Magnesium Chloride, Aqua (RO-filtered water).
Allergen note: Contains no common food allergens, no fragrance, no preservatives. As with any topical, patch test on a small skin area before broader use; discontinue if irritation occurs.
Technical Snapshot
| Product Format | Topical spray solution |
|---|---|
| Net Volume | 8 oz (237 ml) |
| Active Ingredient | Magnesium Chloride USP, Dead Sea origin |
| Active Chemical Formula | MgCl₂ (as hexahydrate, MgCl₂·6H₂O) |
| Formula Ratio | 1:1 magnesium chloride to RO water by weight |
| Elemental Mg per Spray | ~10 mg |
| Total Elemental Mg per Bottle | ~17,700 mg per 8 oz |
| Total MgCl₂ per Bottle | ~150,000 mg per 8 oz |
| Approx. Sprays per Bottle | ~1,800 |
| Carrier | Reverse-osmosis filtered water |
| Appearance | Clear, colorless solution; slightly slippery on skin |
| Bottle Material | Glass with spray top (prevents reactivity) |
| Packaged At | Greenway Biotech facility, Madera, California |
| Testing | Third-party lab tested; heavy metal screened |
What to Expect
First use: The spray feels slightly slippery, then tacky as it dries — that is the magnesium chloride, not residue. A mild tingling on first applications is common, especially on sensitive or freshly shaved skin, and usually fades as skin adapts.
Week 1-2: Skin typically adapts and the tingling diminishes. Many shoppers settle into a consistent evening or post-activity pattern and find the routine becomes a familiar cue.
Month 1+: The habit is established. Whether or not transdermal absorption is part of the effect, the targeted, no-mix routine is the reliable part shoppers come back for.
05 / How to use
Spray.
Massage.
Carry on.
Three favourite patterns. New to topical magnesium? Start with the Evening tab and the feet.
Evening Wind-Down
Quick answer: 10-20 sprays on the soles of the feet, calves, or shoulders 20-30 minutes before bed. Massage in; socks optional.
- About 20-30 minutes before bed, spray 10-20 sprays onto the soles of the feet, calves, or shoulders.
- Massage gently into the skin to help it absorb.
- Pull on a pair of cotton socks if applying to the feet, or let it absorb and leave on overnight.
- Rinse off after 20-30 minutes if you prefer — you still get the benefit of the application while limiting how long the salt solution sits on skin.
Tip: The feet are the best starting point — thicker skin means less tingling. For more on this routine, see Benefits of Magnesium Oil on Feet.
After Activity
Quick answer: 5-10 sprays directly on each worked area after exercise. Massage in; rinse after 20-30 minutes if preferred.
- After exercise — ideally after a shower, when skin is clean — spray 5-10 sprays directly onto each tired or tight area.
- Massage in circular motions to help it absorb.
- Let it sit for 20-30 minutes, then rinse if you prefer.
- For larger areas like the full back or both legs, the spray covers ground faster than a cream and leaves no greasy residue.
Tip: For full-body coverage, a soak with Epsom Salt or Magnesium Chloride Bath Flakes complements targeted daily spray use.
Sensitive Skin & Tingling
Quick answer: Start on the feet, use fewer sprays, dilute 1:1 with distilled water if needed, and follow with moisturizer.
A temporary tingling or itching sensation is common when first using magnesium oil — especially on sensitive, thin, or freshly shaved skin. It is a normal response to concentrated magnesium chloride at the skin's surface, not an allergic reaction, and typically fades with regular use as skin adapts.
- Start on the feet: thicker skin, lower sensitivity — the ideal first site.
- Use fewer sprays at first: begin with 5-10 and increase gradually over 1-2 weeks.
- Dilute if needed: mix 1 part spray with 1 part distilled water in a separate glass bottle for sensitive areas.
- Rinse after 20-30 minutes: limits how long the concentrated solution sits on skin.
- Follow with moisturizer: magnesium chloride is a salt and can feel drying; our Magnesium Cream works well as a follow-up.
- Avoid broken or freshly shaved skin: significantly more sensitive — skip or dilute heavily nearby.
Note: Tingling typically decreases with consistent use. If irritation persists or worsens, discontinue use and consult your healthcare provider.
06 / Directions
Start on the feet.
Start small.
Make it routine.
A simple four-step approach for your first bottle. Build up gradually as your skin adapts.
-
01
Hold and spray.
Hold the bottle 1-2 inches from clean skin and spray onto the target area — feet, calves, shoulders, arms. Start with the soles of the feet if you are new to topical magnesium.
-
02
Massage in.
Gently massage the spray into the skin to help it absorb. A mild tingling on first uses is common and typically fades within 1-2 weeks of regular use.
-
03
Leave on, then rinse if you like.
Leave on for at least 20-30 minutes. Rinse off afterward if you prefer, and follow with a moisturizer — especially helpful for sensitive skin or after applying to larger areas.
-
04
Keep it consistent.
Most shoppers settle into 10-20 sprays once or twice a day. Regular use tends to fit a routine better than occasional heavy application. Build up gradually from a lower starting amount.
Good to Know
For external use only — this product is not formulated for oral consumption. Avoid eyes, broken skin, and open wounds. If you have kidney concerns, cardiovascular concerns, or take medications that affect magnesium levels, consult your healthcare provider before use. Pregnant or nursing individuals should seek medical advice before starting a new magnesium routine.
For external use only. Discontinue use if irritation occurs.
07 / Compare
Spray, cream, flakes,
or powder?
All deliver magnesium chloride topically (the powder also covers DIY and soaks). Here is how the spray fits.
| Format | Typical Use | Convenience | Best For | Notes |
|---|---|---|---|---|
| Magnesium Oil Spray (this product) | Targeted topical, larger areas | Ready to use, no mixing | Fast daily application | 1:1 ratio, ~10 mg Mg/spray; vegan (MgCl₂ + water) |
| Magnesium Cream | Targeted topical with conditioning | Scoop and massage | Dry skin, daily massage | Adds shea, coconut, beeswax; not vegan |
| Magnesium Chloride Bath Flakes | Bath and foot soaks | Dissolve in water | Whole-body soaks | Food-grade flakes; external use only |
| Epsom Salt (Magnesium Sulfate) | Bath soaks; garden use | Dissolve in water | Classic bath ritual | Different chemistry (MgSO₄·7H₂O) |
| Magnesium Chloride USP | DIY oil, soaks, oral solution | Measure and dissolve | Custom concentrations, value | Same Dead Sea active in bulk powder form |
08 / Decision
Is the spray
the right format for you?
A short fit-check so you can decide quickly.
A Great Fit If You
- Want fast, targeted topical magnesium with no mixing or measuring
- Prefer a consistent, pre-formulated 1:1 concentration
- Like to cover larger areas (legs, back) quickly without a greasy residue
- Experience digestive discomfort with higher-dose oral magnesium
- Want a vegan topical option — magnesium chloride and water only
- Are building an evening wind-down or post-workout routine
Consider Another Option If
- You want skin-conditioning butters in the same step — try Magnesium Cream
- You want a whole-body soak — try Epsom Salt or Magnesium Chloride Bath Flakes
- You want to control your own concentration or make larger batches — try Magnesium Chloride USP powder
- You have very sensitive skin that reacts even to diluted application (the cream may be gentler)
09 / Build the routine
Spray for speed.
These complete the routine.
Many shoppers build a layered routine — spray for fast daily use, a cream for dry skin, and a soak for whole-body wind-down.
Skincare
Magnesium Cream
Moisturizing cream blended with magnesium chloride, shea, coconut butter, and beeswax. Ideal as a follow-up after rinsing the spray from sensitive skin.
DIY BaseMagnesium Chloride USP
The same Dead Sea magnesium chloride in bulk powder form — make your own oil at a custom concentration, or use for soaks and foot baths.
Bath SoakEpsom Salt (Magnesium Sulfate)
USP-grade magnesium sulfate for relaxing full-body soaks. Pairs well with targeted daily spray use as part of a complete routine.
Bath SoakMagnesium Chloride Bath Flakes
Large-flake magnesium chloride for bath soaks — the chloride form in a full-bath format for those who prefer it over Epsom salt. External use only.
10 / Safety & handling
Read this before
your first spray.
A short safety summary. For external use only. Keep out of reach of children.
- External use only: this product is not formulated for oral consumption. Avoid spraying near the eyes or onto open wounds or broken skin.
- Patch test sensitive areas. For the face or scalp, dilute first (1:1 with distilled water) and patch test before full application. A mild tingling elsewhere is common and usually fades with regular use.
- Consult your healthcare provider before use if you have kidney concerns, cardiovascular concerns, or take medications that affect magnesium levels. Pregnant or nursing individuals should seek medical advice before starting a new magnesium routine.
- Storage: store in a cool, dry place out of direct sunlight; keep the glass bottle upright and secured. The solution is chemically stable and needs no refrigeration. Do not store in metal containers — magnesium chloride can react with certain metals.
- First aid: for eye contact, flush with clean water for 15 minutes and seek medical attention if irritation persists. For skin irritation, rinse with water and discontinue use. If ingested, do not induce vomiting; contact Poison Control (1-800-222-1222) or seek medical attention.
11 / FAQ
Common questions.
Honest answers.
If your question is not here, contact our team at questions@greenwaybiotech.com.
Why does magnesium oil sometimes itch or tingle?
Magnesium oil can cause a temporary tingling sensation due to the concentrated magnesium chloride interacting with nerve endings at the skin's surface. This is normal, not an allergic reaction, and typically lessens with regular use. Starting on the soles of the feet — where skin is thicker — is the most common way to minimize it when starting out. The Sensitive Skin tab in the How to Use section has step-by-step tips.
How many sprays should I use per application?
Start with 10-20 sprays per application and increase gradually as your skin adapts. Each spray delivers approximately 10 mg of elemental magnesium. Most shoppers use 10-20 sprays once or twice daily. If you are new to topical magnesium, begin at the lower end on the feet and build up over 1-2 weeks.
Where should I spray for an evening routine?
For an evening wind-down, spray onto the soles of the feet, calves, or shoulders 20-30 minutes before bed. The soles of the feet are a popular choice — the skin there is thicker so tingling is less common, and pulling on socks after applying makes overnight use effortless. See What Are the Benefits of Magnesium Oil on Feet?
How long does one 8 oz bottle last?
An 8 oz bottle holds approximately 1,800 sprays. At 20 sprays per day, one bottle lasts about 90 days; at 40 sprays per day, about 45 days. Your actual duration depends on how many areas you treat and how many sprays you use per area.
Can I use magnesium oil on my face or scalp?
The skin on the face and scalp is more sensitive than the legs or torso. If you apply there, dilute with an equal part distilled water in a separate bottle, patch test first, and avoid contact with the eyes. Rinse thoroughly after 20-30 minutes to avoid buildup on those areas.
Can I use the spray alongside oral magnesium?
Many people use both, as they serve different purposes. Topical application is localized and skips the digestive system, while oral magnesium supports whole-body intake. Introduce changes gradually and consult your healthcare provider if you are unsure about total magnesium intake, especially if you have kidney concerns. See Oral vs Transdermal Magnesium.
What is the 1:1 ratio and why does it matter?
The formula uses equal parts magnesium chloride to RO-filtered water by weight — the standard concentration for topical magnesium oil. It delivers a meaningful ~10 mg of elemental magnesium per spray while staying practical for daily use. Higher concentrations are possible but may increase skin sensitivity; lower concentrations reduce the magnesium delivered per spray.
How does the spray compare to making my own at home?
Both use the same USP-grade Dead Sea magnesium chloride. The ready-to-use spray gives you a consistent 1:1 concentration with no measuring or dissolving. Making your own with Magnesium Chloride USP powder gives you flexibility for custom concentrations and larger batches at a lower per-ounce cost. See How to Make Magnesium Oil Using Magnesium Chloride.
Is this product vegan?
Yes. The spray contains only magnesium chloride and reverse-osmosis filtered water — no animal-derived ingredients. (For comparison, our Magnesium Cream contains beeswax and is not vegan.)
Why a glass bottle instead of plastic?
Concentrated magnesium chloride solutions can react with certain plastics and metals over time. A glass bottle prevents leaching and keeps the solution stable and consistent from the first spray to the last. It is also reusable and recyclable.
Who should consult a healthcare provider before use?
Individuals with kidney concerns, cardiovascular concerns, or who take medications that affect magnesium levels should consult their healthcare provider before using magnesium products. Pregnant or nursing individuals and those taking medications should also seek medical advice first. If you are unsure about your magnesium intake, signs of low magnesium levels is a helpful starting point.
Ready to start?
Pick your size. We'll ship it.
Available in an 8 oz glass bottle. Ships from our family-operated facility in Madera, California. Backed by our 90-day money-back guarantee — if it is not the right fit, we will make it right.
Choose your size →Ships from California · 90-day guarantee · For external use only