Shizuka Sleep Magnesium Butter
Harnessing nature's gentle power to turn restless nights into peaceful sleep.
Shizuka (meaning "peaceful" in Japanese) Sleep Butter combines pure magnesium with organic butters and calming lavender.
Just one pea-sized application per arm (2.5g total) delivers 300mg of pure magnesium to to help promote uninterrupted sleep, ease muscle tension, and foster mental calm.
The Kosumosu Difference
Guided by the Hanakotoba meaning of Kosumosu (コスモス) – purity, harmony, and love – this handmade blend is lovingly formulated in small batches in Wimbledon, UK. We use only certified organic butters and oils, with absolutely no synthetic chemicals, artificial fragrances, or hidden additives.
The blend of organic butters creates a luxurious texture that absorbs quickly without excess greasiness. Users typically enjoy 1-2 months of use from each jar, with children often getting upwards of 3 months due to their smaller application needs.
Mangifera Indica Seed (Mango) Butter*, Cocos Nucifera (Coconut) Oil*, Magnesium Chloride, Aqua, Simmondsia Chinensis (Jojoba) Seed Oil*, Cera Alba (White Beeswax), Garcinia Indica Seed (Kokum) Butter*, Tocopherol (Vitamin E Oil)**, Dermasoft 1388 Eco**, Glyceryl Caprylate**, Lavender Essential Oil***
*Organic ingredient **Plant-based preservatives that are widely accepted in organic cosmetics ***Contains Linalool (naturally occurring in essential oils)
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Frequently Asked Questions
1-2 months. Each 110g jar lasts 44 nights using a pea-sized amount on each foot (2.5g total). Some users (like those with RLS) apply more butter for a month of relief, whereas others use as needed. Store in a cool, dry place to maintain freshness.
Most users feel more relaxed within 15-30 minutes of application. Regular use over 1-2 weeks often yields the best results, especially for those with depleted magnesium levels.
Shizuka Sleep is suitable for children 6 months and older. The gentle, natural ingredients are safe for little ones, and many parents find it helpful for establishing bedtime routines. For children, we recommend applying a tiny amount to the soles of their feet before bedtime. As always, do a small patch test first to ensure no sensitivity, and avoid application on broken skin.
While magnesium is beneficial during pregnancy, we always recommend consulting your healthcare provider before using any new products or while breastfeeding.
Many customers use Shizuka Sleep at night alongside other forms of magnesium taken during the day. However, it's important to note the recommended daily allowance for your age group. Speak to a healthcare provider if you're taking medications, have kidney issues, or have concerns about your total magnesium intake.
Many users report that regular nightly application helps reduce daily anxiety levels. Research suggests that magnesium plays a role in regulating neurotransmitters like GABA and glutamate, alongside regulating the stress response system and cortisol levels. Individual responses can vary.
Apply to clean, dry skin. Common areas include legs, feet, shoulders, neck, and lower back. Avoid broken skin or sensitive areas.
The butter absorbs well into skin, but we recommend allowing 5-10 minutes for complete absorption before dressing or getting into bed.
Our mineral-rich formula may sometimes create a tingling sensation as it interacts with your skin - a sign of the active ingredients at work. Everyone's body responds differently. If you experience any discomfort, pause use and speak with your healthcare provider.
Putting this on is the line in the sand to end my day and get ready to sleep. Lovely consistency that allows you to remove the right amount, then it just melts into the skin
Smells wonderful and is helping me relax before bedtime
Works like a charm and came beautifully packaged
Great mag cream, helps me to stay asleep through the night!
Toothpaste size amount on each foot and I'm feeling super relaxed and ready for bed. Permanent fixture in my pre-bed routine!