Best Magnesium Supplements in 2025

For years, magnesium was seen as just another mineral. But in 2025, it’s at the center of conversations about sleep, stress, brain health, and energy. Whether it’s a wellness influencer on TikTok recommending it for better sleep or a researcher presenting data on its role in longevity, magnesium is no longer overlooked. 

The benefits of magnesium are not just hype but backed by science. Magnesium regulates various biochemical reactions, including nerve function, muscle health, and energy production. Yet nearly half of adults worldwide are deficient, and the gap only widens with age. 

This blog explores why magnesium matters more as we age, the best supplement forms, and which brands are leading the way in 2025. 

Why Magnesium Matters More with Age 

When young, the body absorbs magnesium more efficiently. But as we age, absorption declines, and magnesium loss increases. Various factors contributing to this loss include stress, medications, and modern diets heavy in processed foods. Research links this deficiency with: 

• Insomnia and restless sleep 
• Anxiety, irritability, and brain fog 
• Muscle cramps and low recovery 
• Reduced bone density 
• Cardiovascular risks 

Magnesium deficiency isn’t just about daily discomfort; it accelerates biological ageing. Studies show magnesium supports mitochondrial ATP production, regulates inflammation, and maintains healthy DNA methylation, all of which play a role in longevity. 

How to Choose the Best Form of Magnesium? 

Choosing magnesium isn’t just about dosage; the form matters too. Here's a quick look at different magnesium forms and their primary actions. 

• Magnesium Glycinate – Gentle, calming, best for sleep and anxiety. 
• Magnesium Citrate – High absorption, supports digestion, mild laxative effect. 
• Magnesium L-Threonate – Unique for crossing the blood-brain barrier; linked to better memory and cognition. 
• Magnesium Malate – Supports energy and muscle recovery, popular among athletes. 
• Magnesium Oxide – Inexpensive, but poorly absorbed; mainly used as a laxative. 

Each form has its strengths but the best magnesium supplement in 2025 is the one that combines different forms for broader health benefits. 

7 Best Magnesium Supplements in 2025 

Decode Age Mag7 

Instead of relying on one form, Decode Age Mag7 combines a blend of seven highly bioavailable magnesium types, including magnesium glycinate, orotate, malate, and more, covering everything from calming the nervous system to boosting energy and sharpening cognition.  

It is manufactured under strict quality standards and is allergen-free, vegan, and third-party tested. Mag7 offers comprehensive support for sleep, stress resilience, muscle recovery, and brain health making it a top magnesium supplement in 2025. 

Who Should Choose This? 

Anyone who wants an all-in-one magnesium supplement to support longevity, combining benefits for sleep, energy, stress, and cognition. 

Thorne Magnesium Bisglycinate Powder 

Thorne Magnesium bisglycinate powder is highly absorbable and gentle on the gut, making it a favourite among those seeking stress relief and improved sleep. Being NSF Certified for Sport, it’s trusted by athletes who need assurance about purity and banned substance testing. 

Powder format makes it easy to add into water or shakes, though some may prefer capsules. It’s more focused on sleep and stress than other health goals. 

Who Should Choose This? 

Best for people who prioritise restful sleep and stress reduction with a powder that’s easy to dose. 

Nutricost Magnesium Citrate Powder 

Nutricost Magnesium Citrate Powder is one of the most budget-friendly magnesium options that comes in fruit punch flavour. Known for muscle cramp relief and digestion, it’s widely used by athletes and those with constipation. Being third-party tested adds credibility, though its mild laxative effect may not suit all. 

It’s more affordable but doesn’t provide the neurological or cognitive advantages of forms like threonate. Still, for cost-conscious consumers, it’s a reliable choice. 

Who Should Choose This? 

Best for those needing digestive balance and muscle recovery on a budget. 

Double Wood Magnesium Complex 

Double Wood’s MAG-8 Magnesium Complex is one of the most comprehensive magnesium formulas on the market in 2025. Unlike most magnesium supplements in the market, MAG-8 includes eight distinct forms of magnesium in one serving.  

Manufactured and tested in the USA, the formula undergoes rigorous third-party checks with Certificates of Analysis (COAs) available for full transparency.  

Who Should Choose This? 

Best for individuals who want a high-coverage, all-in-one magnesium blend that supports energy, muscle recovery, heart health, and relaxation, all backed by third-party testing. 

Pure Encapsulations Magnesium Citrate 

Pure Encapsulations magnesium citrate is a clean, filler-free, and highly bioavailable supplement. It is best suited for digestive regularity. It is third-party tested and produced under GMP certification, ensuring strict quality. However, its benefits are more niche, focusing on just digestion. Their products are free from unnecessary additives and many common allergens.  

Who Should Choose This? 

Best for those with digestive issues seeking a doctor-trusted brand. 

Momentous Magtein® Magnesium L-Threonate 

Momentous delivers Magtein® L-threonate, the only magnesium proven to cross the blood-brain barrier. Backed by MIT research, it’s a top choice for people who want better memory, focus, and long-term brain health. Certified for sport and third-party tested, it’s trusted by athletes and professionals alike.  

Who Should Choose This? 

Perfect for anyone wanting a targeted, clinically backed brain health formula. 

Doctor’s Best High Absorption Magnesium 

It is a budget-friendly, gentle-on-the-stomach option. Doctor’s Best provides a simple daily dose of magnesium that helps with mild cramps, relaxation, sleep, and filling nutritional gaps. While it doesn’t have advanced formulations, it’s reliable for everyday use. 

Conclusion 

Magnesium deficiency is one of the most overlooked health issues, and in 2025, the right supplement can make all the difference. If your goal is specific, like memory, digestion, or energy, single-form products may work well. 

But for those who want comprehensive support, taking magnesium complexes like Decode Age Mag7 can be a better and smart choice. By blending various bioavailable forms of magnesium, it helps deliver broad benefits, from sleep to cognition to energy. It is important to check if the product you choose is third-party tested, safe to use, and of high-quality.   

“Every step you take towards better health is a victory worth celebrating.” – Decode Age 

FAQs 

How much magnesium do adults need daily? 

The recommended dietary allowance (RDA) is 310–420 mg for adults, depending on age and gender. 

Which magnesium form is best for sleep in 2025? 

Magnesium glycinate is considered the most effective for sleep due to its calming effect on the nervous system. Many people find they fall asleep faster and wake less often when supplemented with glycinate in the evening. 

Are there any risks with magnesium supplements? 

In healthy individuals, magnesium is safe when taken as directed. Excessive intake may cause digestive upset, especially with citrate or oxide forms. Those with kidney issues should consult a healthcare provider before using magnesium supplements. 

Why choose Decode Age Mag7 over other magnesium products? 

Unlike single-form supplements, Decode Age Mag7 blends seven forms of magnesium, addressing sleep, cognition, energy, digestion, and muscle recovery together. It’s third-party tested, vegan, and tailored for longevity, making it one of the best magnesium supplements in 2025.