Magnesium Citrate: How Much Is Too Much?

Today we’re answering a surprisingly common question in both Ireland and the UK:
“Should I drink the whole bottle of magnesium citrate?”

What Happens If You Take Too Much Magnesium Citrate?

If you consume an entire bottle of magnesium citrate—whether it's liquid or capsule form—you're almost guaranteed to experience diarrhoea. That’s your body’s way of flushing out the excess magnesium. It’s not dangerous in most cases, but it’s definitely uncomfortable and unnecessary.

Magnesium citrate is frequently used to relieve occasional constipation, which is often a sign of magnesium deficiency. However, taking too much at once won't help your body absorb more magnesium—it will just push everything through your bowels and waste what you don't use.

Unless you're under medical supervision, never take the whole bottle. Instead, start with a small amount and gradually increase your dosage to find your personal tolerance level.

Why We Don’t Recommend Pre-Made Liquid Magnesium Citrate

Most people asking about “drinking the whole bottle” are referring to ready-made liquid magnesium citrate, commonly found in supermarkets or pharmacies. This isn’t the form we recommend. Here’s why:

• Pre-made liquids and capsules aren’t ionic

• Once bottled, they begin to lose potency after 48 hours

• They're less bioavailable than powders mixed fresh

The Best Form: Ionic Magnesium Citrate Powder

Our MAG365 is an Ionic Magnesium Citrate Powder—formulated to activate instantly when mixed with hot water, forming a highly absorbable ionic solution.

• Better absorption than tablets or bottled liquids

• Fast-acting for constipation relief

• Easily adjustable dosage

You can also mix it with cold water, though it takes around 20 minutes to fully activate.

Bottom Line: Don’t Overdo It

If you’re struggling with constipation in the UK or Ireland, there’s no need to chug an entire bottle of magnesium citrate. Instead:

• Start small (around 1 teaspoon)

• Gradually increase your dosage

• Find your personal bowel tolerance

Powdered forms like MAG365 offer flexibility and fast relief, without the harsh side effects of overdoing it.

You can find MAG365 at your local health shop or pharmacy across the UK and Ireland or order online via the link below. If you have questions about dosage or product types, feel free to reach out—we’re always happy to help.

Thanks for watching and take care!

Shop MAG365 Ionic Magnesium Citrate Powder