Topical vs Oral Magnesium: Which Is Best for Athletic Recovery?

Walk down the sports nutrition aisle and magnesium comes in every format: fizzy powders, capsules, flakes for the bath, sprays and creams. The pitch for the cream is especially appealing: rub it into your calves after a long run, skip the tablets, skip the stomach trouble.

It is a good story. The research only backs half of it. Here is how oral and topical magnesium actually compare, and how to use each one sensibly.

Oral vs Topical at a Glance

Oral Magnesium: The Route with the Evidence

A 2017 review in Nutrients notes that the effectiveness of oral magnesium for treating a shortfall has been studied in detail, and that numerous studies show oral supplements work for treatment and prevention.

• The Upside: It is the well-studied way to raise your magnesium if your diet falls short.
• The Downside: A 2020 Cochrane review found oral magnesium was associated with mostly gut side effects, such as diarrhoea. Take it well away from a long run or race.
• The Target: Adult men need 400 to 420mg a day and adult women 310 to 320mg, with higher needs for very active people, according to a 2024 review.

Topical Magnesium: What the Evidence Says

The appeal of creams and sprays is that they skip the gut. The 2017 Nutrients review looked at the claims that magnesium is absorbed better through the skin, with fewer side effects, and concluded that the promotion of transdermal magnesium is scientifically unsupported. The authors called for larger and longer studies of magnesium creams to find out whether they make any difference to magnesium levels.

The research only backs half of the story.

So Why Use a Cream at All?

Because a slow self-massage at the end of a training day is a good habit in its own right. A cream gives you a reason to spend five minutes on your calves and hamstrings before bed. Just do not rely on it to fix a magnesium shortfall.

Photo: SportPlus.sg / Isis Ang

Which Should You Choose?

• Start with Food: Green leafy vegetables, whole grains, nuts, seeds and legumes are rich sources of magnesium.
• Choose Oral If: Your doctor finds you are low, or your diet cannot cover your needs. Pick a time well away from training.
• Choose a Cream If: You want a massage ritual after training or before bed. Enjoy it for that.
• For Cramps: Neither route has good evidence. The Cochrane review found no trials on exercise-associated cramps.

Make It Part of Your Wind-Down on ATHLO+

AporeNaturals Magnesium Cream is made with 20% magnesium chloride and is described by AporeNaturals as 100% natural, vegan and non-toxic, and suitable for daily use, even on sensitive skin. Use it as your excuse for an evening massage. The full range is on the AporeNaturals page.

Ready for the bigger picture? Read Magnesium for Muscle Recovery next.