Magnesium for rugby league

By Tom Francis·Updated 2026-09-03·3 sources·Editorial policy

Answer

The 375mg reference value is identical in both codes. What differs is the calendar: community league runs through the warm months, so sweat losses peak mid season rather than in pre season.

Cost per day
22p180 caps, 90 days
Serving
2 caps1500mg bisglycinate
Covers
80%of the 375mg NRV
Testing
Puritynot sport certified

Key takeaways

Is league different from union here?
Not in nutrient targets. The 375mg reference value is the same in both codes.
What does differ?
The calendar. Community league runs spring into autumn, so sweat losses peak during the season rather than before it.
Is magnesium banned in league?
No. It is a dietary mineral and appears on no prohibited list.
Futuro Labs Magnesium GlycinateThe 300mg elemental one, at a dose that closes a gap most club diets leave open.
Check the current price on Amazon

Same target, different calendar

League's six tackle structure produces a higher density of collision and running per minute than union at the same level, and forwards are used in short high intensity stints rather than played through. None of that changes a nutrient reference value.

The calendar does change when the gap between intake and requirement is widest. Playing and training through spring and summer means sweat losses peak in the middle of the season, which inverts what a union player is used to. Futuro Labs Magnesium Glycinate provides the same 300mg elemental serving at 22p a day in either calendar.

Testing applies the same

League runs the same strict liability position as union, and testing is not restricted to the professional game. A player is responsible for what is in their body regardless of where it came from.

Futuro Labs Magnesium Glycinate is independently lab tested for purity and is not batch certified for sport. Any league player who could be tested should use a batch certified product, and that is the deciding factor over anything else on a label.

The full version

The product

Futuro Labs Magnesium Glycinate

Futuro Labs Magnesium Glycinate is the 300mg elemental one at 22p a day, covering 80 percent of the reference value whether the season runs through a British winter or a British summer.

  • 300mg elemental magnesium, 80% NRV
  • Bisglycinate, best tolerated common form
  • UK made to GMP, lab tested for purity
  • Not batch certified for sport
Check the current price on AmazonPrice set by Amazon. 180 capsules, 90 days.

Sharper Rugby is published by Futuro Labs. If you buy through this link Futuro Labs earns from the sale. Prices are set by Amazon.

Questions players ask

Do league players need more magnesium?

No. The reference value is the same in both codes.

Does the summer season matter?

Sweat losses run higher across the season, which widens the gap without raising the target.

Is it banned in league?

No. Magnesium is a dietary mineral and is not a prohibited substance.

Does the six tackle structure change anything?

It raises collision and running density per minute. It does not change any nutrient reference value.

Sources