Cruise: Expert reveals why you should always pack this unlikely item for cruise holidays

Stewart advised those heading on a cruise to take probiotics – before the trip and during. Probiotics may improve digestive health, heart health and immune function, to name just a few.

“Many of us take vitamin, mineral and digestive supplements when we’re at home,” he wrote.

“Should you fall into this category, don’t forget to pack a supply with you.

“We suggest taking a probiotic to help regulate your digestion while onboard and travelling.