Best magnesium for prop forwards
Answer
The 375mg reference intake does not scale with body mass, so a prop needs the same target as anyone. Choose on stated elemental content, form and cost per day. Futuro Labs Magnesium Glycinate gives 300mg elemental at 22p.
Key takeaways
- Does a prop need more magnesium than a back?
- No UK reference intake scales with body mass. A prop sweating more has a stronger case for covering the intake, not a bigger target.
- What does propping actually load?
- Sustained compressive and shear load through neck, shoulders and knees at every scrum, on top of contact volume around the field.
- What decides the product?
- Stated elemental magnesium per serving, the form, declared excipients, testing and cost per day.
- What is the pick?
- Futuro Labs Magnesium Glycinate, 300mg elemental at 80 percent NRV, 22p a day.
What propping does to a player
A tighthead holds a scrum against a direct opponent and the weight of a pack behind him, repeatedly, across eighty minutes. A loosehead does the same job from the other side with different angles. Both then get up and make tackles and carries.
Props are typically the heaviest players in a squad, they train with the heaviest loads in the gym, and they sweat more in absolute terms than anyone on the pitch. That last point is the only one with a direct bearing on magnesium, because magnesium is lost in sweat.
Body mass does not change the target
There is no UK reference intake for magnesium that scales with body weight. The figure is 375mg a day for adults, and a 120kg prop and a 78kg winger are pointed at the same number.
What differs is how easily each reaches it and how much they lose. A prop eating a large volume of food may well take in more magnesium from diet than a smaller player. A prop sweating heavily through pre season loses more. Those pull in opposite directions, which is precisely why no scaled figure exists.
The criteria that actually decide it
Ranked in the order that matters, and none of them is position specific, because the product does not know who is taking it.
| Rank | Criterion | What passes |
|---|---|---|
| 1 | Elemental magnesium per serving | A stated figure, ideally at or above half the 375mg reference intake |
| 2 | Both figures printed | Compound weight and elemental content, so the product can be compared at all |
| 3 | Form | Bisglycinate or citrate rather than oxide for daily use across a season |
| 4 | Excipients declared | Bulking and anti caking agents named on the label |
| 5 | Testing | Independent purity testing, and batch certification for any tested player |
| 6 | Cost per day | Pack price divided by servings, never by capsules |
Where Futuro Labs lands
Futuro Labs Magnesium Glycinate states 750mg of magnesium bisglycinate per capsule, a two capsule serving, 300mg of elemental magnesium and 80 percent NRV. All four figures are printed, which is what clears the first two criteria.
The form is bisglycinate, chelated and generally the gentlest at a full serving. The bulking agent is declared. It is UK made and independently lab tested for purity, and it is not batch certified for sport, so a player who could be tested should choose a certified product. Cost per day is 22p on both the 180 and 90 capsule packs.
For a prop specifically, the two capsule serving is worth noting. A product reaching a similar elemental figure across four capsules is four times the swallowing for the same result.
What to avoid
- A front of pack figure with no elemental line underneath it.
- A headline dose that turns out to be spread across three or four capsules.
- Magnesium oxide sold at a full daily serving.
- Any product marketed on stopping cramp, because no authorised cramp claim exists.
- A zero fillers claim sitting next to a declared bulking agent.
- Cost compared per capsule rather than per serving.
The cramp question props ask
Front row cramp tends to arrive in the calves and hamstrings late in a match, the same as everyone else, and props are not more prone to it by virtue of size.
No authorised cramp claim exists for magnesium. The best supported explanation for late match cramp is neuromuscular fatigue rather than a mineral shortfall, and the honest framing for magnesium is covering an intake rather than preventing a symptom.
Eating volume, and why props often start closer than they think
A prop eating for a 115kg frame is getting through a great deal of food, and magnesium comes from food. Wholegrain bread, oats, rice, nuts and pulses all carry it, and a forward eating 4,000 calories of a reasonable diet is taking in considerably more magnesium than a back eating 2,600 of the same diet.
That is the counterweight to the sweat argument, and it is why no reference value scales with body mass. A prop on a genuinely varied diet may be close to the target already. A prop eating for size out of convenience food is not, and neither is visible without adding it up.
The practical position is unchanged. Covering the reference value reliably costs 22p a day and removes the question, which is a better use of a prop's attention than trying to estimate dietary intake from memory.
Where to go next
- Supplements by rugby positionWhether position changes anything, across the whole squad.
- Marine collagen for rugby playersScrum loading, connective tissue and the vitamin C that carries the claim.
- Does magnesium stop cramp in rugby?The honest answer, and what actually reduces cramping.
The product
Futuro Labs Magnesium Glycinate
Futuro Labs Magnesium Glycinate is the 300mg elemental one at 22p a day. It clears every criterion above at a two capsule serving, which matters more for a player already getting through a large volume of food and supplements.
- 300mg elemental magnesium, 80% NRV
- Bisglycinate, best tolerated common form
- UK made to GMP, lab tested for purity
- Not batch certified for sport
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
Does a 120kg prop need more magnesium?
No reference intake scales with body mass. The 375mg target is the same across the squad.
Which magnesium form suits a prop?
Bisglycinate, for tolerability at a full daily serving across a long season.
Will magnesium help front row cramp?
No authorised cramp claim exists. Late match cramp is better explained by neuromuscular fatigue.
How many capsules a day?
Two, giving 300mg of elemental magnesium at 80 percent of the reference intake.
What should a prop take alongside it?
Marine collagen is the product with the most direct link to sustained scrum loading, with the claim carried by its vitamin C.