Magtein® Magnesium L-Threonate 4-Month
Magtein® Magnesium L-Threonate
| Patented Magnesium L-Threonate 4-Month Mega Tub
| Magtein® patent·for Sleep·Mood·Brain [In Stock, Ready to Ship]
- To give you a more cost-effective shopping experience, we have chosen a higher-value shipping method. Delivery is expected in up to about 20 days. Thank you for your understanding and patience.
- Additional customs duties may apply once the product arrives in the United States.
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2～3 capsules/day
As Low as
11.00 GBP/month
The following content is a scientific introduction to ingredient knowledge, representing only the effects of nutritional components and not serving as an introduction to the product's effects.
Scientific Evidence
Magnesium helps reduce the symptoms of attention deficit and hyperactivity disorder (ADHD) by regulating the balance of neurotransmitters and maintaining normal brain function. Magnesium's anti-anxiety effects also help improve concentration, allowing people to focus better at work and school. A trial focusing on patients with ADHD showed that 47% of the subjects met the response criteria and achieved improved concentration after magnesium supplementation.
Magnesium enhances synaptic plasticity—crucial for memory formation and storage. L-Threonate is especially effective, crossing the BBB to raise brain Mg and boost memory and learning.
In seniors with primary insomnia, dietary Mg significantly increased sleep time, efficiency, serum renin and melatonin, while reducing sleep latency and cortisol.
Mg modulates neurotransmitters such as serotonin and dopamine to balance mood; deficiency may cause irritability and anxiety.
Research evidence on the substance L-Threonate magnesium
The efficacy marked with * has been partially substantiated by research, and effects may vary among individuals.
Self-check for magnesium deficiency
overwork &
Low
productivity
Forgetfulness
& Long time in
bed yet awake
Easily
distracted
irritable &
Daytime
drowsiness
sense of
direction &
Frequent
mistakes
Epidemiological surveys show
that magnesium deficiency exists
in many parts of the world.
According to data from the U.S. National
Health and Nutrition Examination Survey
(2001-2010), only 18.8% of male
participants and 24.8% of female
participants had magnesium intake that
met the recommended dietary intake.
Product Profile
Patented Magnesium L-Threonate
Authorized Factory
Certification
FDA, HACCP, GMP, ISO22000,
Hong Kong pharmaceutical qualifications
Patented Magnesium L-Threonate
Suitable For
Youth 9-15 & adults 16 +
Individuals needing daily magnesium supplementation or seeking to improve their sleep quality
Not Suitable For
Children under 9 years old
Pregnant or breastfeeding women
Caution Advised For
Individuals with a history of kidney disease
Those currently taking antibiotics
Important:
Please inform your doctor before use and follow their guidance. To avoid competition with calcium absorption, it is recommended to take magnesium and calcium supplements at different times of the day (at least 2 hours apart).
Specifications
360 capsules per bottle
1 bottle = 4-month supply
Ingredient Amounts (3 capsules per serving)
Magnesium
144mg
(from 2000 mg Magtein® Magnesium L-Threonate)
Directions
- Age 9-15 2 capsules daily
- Age 16+ 3 capsules daily
- Recommended at night
Shelf Life
24 months
Storage
Keep in a cool, dry place, away from sunlight.
Note
Not recommended to take this product simultaneously or on the same day as UndoAge D3K2 Calcium. (If users are diagnosed with severe D3 deficiency in the hospital, they may take it on the same day as advised by their physician.) Separate from R-Alpha Lipoic Acid by ≥ 3 hours
Disclaimer
*The effects mentioned above are based on scientific research related to the ingredients, with references available upon request from our customer service.
Due to variations in production batches and manufacturing processes, there may be differences in the appearance of the product (such as capsules/tablets/form/colour), printing styles, and outer packaging. However, all products meet safety standards, so please rest assured.
Cautions
- Keep out of reach of children.
- Do not use if the safety seal is broken or missing.
- Consult your healthcare professional if you are pregnant or breastfeeding.
- If you are taking any medications or have any health concerns, it is advisable to consult your healthcare professional.
- This product is not intended to diagnose, treat, cure, or prevent any disease.
- This supplement should always be used in conjunction with a healthy diet and regular exercise program.
- Please refer to the supplement details page for ingredient information before purchasing; avoid use if you are allergic to any ingredients.
- Discontinue use if you experience any adverse effects.
- Do not take with medications.
Return Policy
If you are not completely satisfied with your purchase, please contact us via email. We will recommend the most suitable solution for you. Thanks to our adherence to industry-leading standards and UndoAge's quality assurance, customers rarely need to return products. However, if a return is necessary, rest assured that we will ensure a safe and hassle-free process.
We offer a 14-day worry-free refund guarantee for every order. Upholding our customer-first principle, we will:
- Provide a full refund for unopened products.
- For opened products (excluding powdered items), if the remaining quantity is ≥50%, you will receive a 50% refund.
Important Notes:
1. Return shipping costs must be borne by the customer.
2. To request a refund, please email
○ Order number
○ Photos of the product
○ Proof of purchase
○ Reason for return
Refund Processing Times:
1. Return review: up to 7 business days
2.Refund issuance: 7-14 business days after approval
Shipping information
Order processing time 1–2 business days; in-stock items ship immediately; pre-sale items ship according to the specified release dates
Reference for Regional Tax Standards
According to the Customs Tariff Policies of Various Countries, for products purchased personally by consumers, if customs duties are required, you will need to handle the payment yourself in accordance with the local laws and regulations.
| Country / Territory | Duty-Free Allowances | Duty-Free Allowances (USD) | General Trade Import of Supplements / Dietary Supplements Import Duty Rates |
|---|---|---|---|
| Japan | JPY 100,000 | Approx $75.71 USD | 0% - 5% (depending on product) |
| United States | None From May 2nd 2025, small parcels under $800 incur duties of 120% of value or $100 per item (whichever is higher); from June 1 2025, the flat fee rises to $200 per item. |
- | Import Duty: 145% (as of now) State Sales Tax: TBD |
| Taiwan | TWD 2,000 | Approx $65.71 USD | 5% import duty + 5% business tax |
| Canada | CAD 20 | Approx $15.71 USD | 0% import duty, but 5% - 15% GST/HST applies |
| South Korea | USD 150 | - | 8% import duty + 10% VAT |
| Singapore | SGD 400 | Approx $308.57 USD | 0% import duty, but 8% GST applies |
| Australia | AUD 1,000 | Approx $671.43 USD | 0% import duty, but 10% GST applies |
| Netherlands | EUR 150 – duty-free; EUR 22 – VAT-free |
Approx $162.86 USD, duty-free Approx $23.86 USD, VAT-free |
Import Duty: 9% Standard VAT: 21% |
| Germany | • €45 – duty & VAT-free • €45 - €700 – flat 17.5% on declared value (excl. shipping) • >€700 – standard duties and VAT apply |
Approx $48.86 USD | • Up to €150 (~$162.86) tax-free; 19% VAT (7% on some goods) applies • Over €150 (~$162.86): 9% import duty + 19% VAT |
| Italy | EUR 150 – duty-free; EUR 22 – VAT-free |
Approx $162.86 USD, duty-free Approx $23.86 USD, VAT-free |
0% - 17% import duty (depending on product) + 22% VAT |
| France | EUR 150 | Approx $162.86 USD | 0% - 17% import duty (depending on product) + 20% VAT |
| Spain | EUR 150 – duty-free; EUR 22 – VAT-free |
Approx $162.86 USD, duty-free Approx $23.86 USD, VAT-free |
0% - 17% import duty (depending on product) + 21% VAT |
| New Zealand | NZD 60 | Approx $35.43 USD | 0% import duty + 15% VAT |
| United Kingdom | GBP 135 – duty-free; GBP 15 – VAT-free |
Approx $177.43 USD | 0% - 17% import duty (depending on product) + 20% VAT |
| Thailand | THB 1,000 | Approx $30.57 USD | 0% import duty + 7% VAT |
| Indonesia | USD 3 | - | Imports under $3: duty-free + 11% VAT $3 - $1,500: 7.5% import duty + 11% VAT Over $1,500: Most-Favored-Nation rate (0% duty) + 5% - 15% VAT (12% for fish oil) |
| Malaysia | RMB 5,000 | Approx $714.29 USD | 0% import duty |
| Brazil | USD 50 – tax-free | - | Import Duty: 9% (simplified regime; goods valued $50 - $3,000 incur a flat 60% CIF-based duty) State Consumption Tax: 17% - 19% (simplified regime: 18% on CIF + import duty) |
| Mexico | USD 50 – duty & VAT-free | - | 10% import duty + 16% VAT + 0.8% deferred tax on CIF + import duty |
| Vietnam | VND 1,000,000 – duty-free | Approx $40.50 USD | 10% import duty + 10% VAT |
| Hong Kong | RMB 12,000 | Approx $1,714.29 USD | 0% import duty + customs clearance fee (≤HK$46,000: HK$50.00; >HK$46,000: +HK$0.25 per additional HK$1,000 or fraction; fractions <HK$5: HK$0.10) |
| Macau | RMB 12,000 | Approx $1,714.29 USD | 0% import duty |
| Ireland | EUR 150 (duty on shipping ≤€10 exempt) EUR 22 (VAT on shipping ≤€6 exempt) |
Approx $162.86 USD, duty-free Approx $23.86 USD, VAT-free |
0% - 17% import duty (depending on product) + 23% VAT |
| Austria | EUR 150 – duty-free; EUR 22 – VAT-free; combined duties & VAT ≤€10 exempt |
Approx $162.86 USD, duty-free Approx $23.86 USD, VAT-free |
0% - 17% import duty (depending on product) + 20% VAT |
| Belgium | EUR 150 – duty-free; EUR 22 – VAT-free |
Approx $162.86 USD, duty-free Approx $23.86 USD, VAT-free |
0% - 17% import duty (depending on product) + 21% VAT |
| Portugal | EUR 150 – duty-free; EUR 22 – VAT-free |
Approx $162.86 USD, duty-free Approx $23.86 USD, VAT-free |
0% - 17% import duty (depending on product) + 21% VAT |
| Switzerland | CHF 5 – duty-free; CHF 5 – VAT-free |
Approx $5.88 USD | 133.4 PER/100 kg (fish oil) + 7.7% VAT |
| Greece | EUR 150 – duty-free | Approx $162.86 USD | 0% - 17% import duty (depending on product) + 24% VAT |
| Country / Territory | Duty-Free Allowances | General Trade Import of Supplements / Dietary Supplements Import Duty Rates |
|---|---|---|
| Japan |
Local Currency : JPY 100,000 USD : Approx $75.71 USD |
0% - 5% (depending on product) |
| United States |
Local Currency : None From May 2nd 2025, small parcels under $800 incur duties of 120% of value or $100 per item (whichever is higher); from June 1 2025, the flat fee rises to $200 per item. USD : - |
Import Duty: 145% (as of now) State Sales Tax: TBD |
| Taiwan |
Local Currency : TWD 2,000 USD : Approx $65.71 USD |
5% import duty + 5% business tax |
| Canada |
Local Currency : CAD 20 USD : Approx $15.71 USD |
0% import duty, but 5% - 15% GST/HST applies |
| South Korea |
Local Currency : USD 150 USD : - |
8% import duty + 10% VAT |
| Singapore |
Local Currency : SGD 400 USD : Approx $308.57 USD |
0% import duty, but 8% GST applies |
| Australia |
Local Currency : AUD 1,000 USD : Approx $671.43 USD |
0% import duty, but 10% GST applies |
| Netherlands |
Local Currency : EUR 150 – duty-free; EUR 22 – VAT-free USD : Approx $162.86 USD, duty-free Approx $23.86 USD, VAT-free |
Import Duty: 9% Standard VAT: 21% |
| Germany |
Local Currency : • €45 – duty & VAT-free • €45 - €700 – flat 17.5% on declared value (excl. shipping) • >€700 – standard duties and VAT apply USD : Approx $48.86 USD |
• Up to €150 (~$162.86) tax-free; 19% VAT (7% on some goods) applies • Over €150 (~$162.86): 9% import duty + 19% VAT |
| Italy |
Local Currency : EUR 150 – duty-free; EUR 22 – VAT-free USD : Approx $162.86 USD, duty-free Approx $23.86 USD, VAT-free |
0% - 17% import duty (depending on product) + 22% VAT |
| France |
Local Currency : EUR 150 USD : Approx $162.86 USD |
0% - 17% import duty (depending on product) + 20% VAT |
| Spain |
Local Currency : EUR 150 – duty-free; EUR 22 – VAT-free USD : Approx $162.86 USD, duty-free Approx $23.86 USD, VAT-free |
0% - 17% import duty (depending on product) + 21% VAT |
| New Zealand |
Local Currency : NZD 60 USD : Approx $35.43 USD |
0% import duty + 15% VAT |
| United Kingdom |
Local Currency : GBP 135 – duty-free; GBP 15 – VAT-free USD : Approx $177.43 USD |
0% - 17% import duty (depending on product) + 20% VAT |
| Thailand |
Local Currency : THB 1,000 USD : Approx $30.57 USD |
0% import duty + 7% VAT |
| Indonesia |
Local Currency : USD 3 USD : - |
Imports under $3: duty-free + 11% VAT $3 - $1,500: 7.5% import duty + 11% VAT Over $1,500: Most-Favored-Nation rate (0% duty) + 5% - 15% VAT (12% for fish oil) |
| Malaysia |
Local Currency : RMB 5,000 USD : Approx $714.29 USD |
0% import duty |
| Brazil |
Local Currency : USD 50 – tax-free USD : - |
Import Duty: 9% (simplified regime; goods valued $50 - $3,000 incur a flat 60% CIF-based duty) State Consumption Tax: 17% - 19% (simplified regime: 18% on CIF + import duty) |
| Mexico |
Local Currency : USD 50 – duty & VAT-free USD : - |
10% import duty + 16% VAT + 0.8% deferred tax on CIF + import duty |
| Vietnam |
Local Currency : VND 1,000,000 – duty-free USD : Approx $40.50 USD |
10% import duty + 10% VAT |
| Hong Kong |
Local Currency : RMB 12,000 USD : Approx $1,714.29 USD |
0% import duty + customs clearance fee (≤HK$46,000: HK$50.00; >HK$46,000: +HK$0.25 per additional HK$1,000 or fraction; fractions <HK$5: HK$0.10) |
| Macau |
Local Currency : RMB 12,000 USD : Approx $1,714.29 USD |
0% import duty |
| Ireland |
Local Currency : EUR 150 (duty on shipping ≤€10 exempt) EUR 22 (VAT on shipping ≤€6 exempt) USD : Approx $162.86 USD, duty-free Approx $23.86 USD, VAT-free |
0% - 17% import duty (depending on product) + 23% VAT |
| Austria |
Local Currency : EUR 150 – duty-free; EUR 22 – VAT-free; combined duties & VAT ≤€10 exempt USD : Approx $162.86 USD, duty-free Approx $23.86 USD, VAT-free |
0% - 17% import duty (depending on product) + 20% VAT |
| Belgium |
Local Currency : EUR 150 – duty-free; EUR 22 – VAT-free USD : Approx $162.86 USD, duty-free Approx $23.86 USD, VAT-free |
0% - 17% import duty (depending on product) + 21% VAT |
| Portugal |
Local Currency : EUR 150 – duty-free; EUR 22 – VAT-free USD : Approx $162.86 USD, duty-free Approx $23.86 USD, VAT-free |
0% - 17% import duty (depending on product) + 21% VAT |
| Switzerland |
Local Currency : CHF 5 – duty-free; CHF 5 – VAT-free USD : Approx $5.88 USD |
133.4 PER/100 kg (fish oil) + 7.7% VAT |
| Greece |
Local Currency : EUR 150 – duty-free USD : Approx $162.86 USD |
0% - 17% import duty (depending on product) + 24% VAT |