If someone has persistent:

Knee pain
Hip pain
Shoulder pain
Joint stiffness
Swelling
Reduced mobility

the cause should be evaluated rather than assuming the problem is a mineral deficiency.

A balanced diet can support overall health, but it isn’t the same thing as repairing damaged cartilage.

Can Magnesium Help Nerve Function?

Yes—but again, the viral claim exaggerates what that means.

Magnesium is involved in normal nerve impulse transmission and muscle contraction.

A severe magnesium deficiency can cause neurological and muscular problems.

But that doesn’t mean every nerve problem is caused by low magnesium.

Nerve symptoms can have many causes, including:

Diabetes
Vitamin deficiencies
Certain medications
Nerve compression
Alcohol-related nerve damage
Thyroid disorders
Kidney disease
Neurological conditions

Therefore, unexplained numbness, tingling, burning, or weakness deserves proper evaluation rather than automatic magnesium treatment.

What About Anxiety?

This is another area where social media has gotten ahead of the evidence.

Magnesium has become popular as a natural approach to anxiety, and there are studies investigating this relationship.

A systematic review found some promising results, but the researchers emphasized that the studies were heterogeneous and often small, meaning larger and better-designed trials are needed.

So it would be more accurate to say:

Magnesium may have a role in some people’s anxiety symptoms, particularly when magnesium status is low, but it isn’t established as a universal treatment for anxiety.

And What About Depression?

The claim that this powder can make depression disappear is even more problematic.

Depression is a serious medical condition with many possible biological, psychological, and social contributors.

The National Center for Complementary and Integrative Health emphasizes that complementary approaches should not replace conventional treatment or delay professional care for depression. (nccih.nih.gov)

Magnesium research in relation to depression is still developing, and the evidence isn’t strong enough to tell people that taking a particular powder will cure depression.

If someone is experiencing persistent sadness, loss of interest, hopelessness, or other symptoms of depression, getting appropriate medical or mental-health care is much more important than trying an internet remedy.

Can Magnesium Fix Insomnia?

This is one of the most popular magnesium claims online.

Unfortunately, the evidence is not nearly as definitive as viral posts suggest.

NCCIH reports that there is very little research on magnesium for insomnia. Reviews have produced conflicting results, and some of the available studies are low quality.

So magnesium might be useful for some people, but:

“Two tablespoons every morning will eliminate insomnia” is not supported by good evidence.

Persistent insomnia can have many causes, including stress, medications, sleep apnea, depression, anxiety, irregular schedules, caffeine, alcohol, and other medical conditions.

The Biggest Problem With “Two Tablespoons”

The dose is what makes the viral claim particularly concerning.

A tablespoon is a relatively large volume.

Two tablespoons is six teaspoons.

And the amount of elemental magnesium in a product depends on the specific compound and formulation.

The NIH’s tolerable upper intake level for magnesium from supplements and medications is 350 mg per day for adults, unless a healthcare professional recommends otherwise. This limit does not include magnesium naturally present in food.

That doesn’t mean 350 mg is a universal treatment dose. It is a safety limit for supplemental/medication magnesium for healthy people.