Vitamin C is such a widely accepted treatment for the common cold that we seek it out in lots of products such as fortified juices, cough drops, and tea.

C1 Diet Beverage From Snapple Snapple announced it would introduce a fortified juice to be marketed as an alternative to meal replacement drinks such as Slim-Fast.

Nowadays, you can also find calcium in fortified orange juice and bread.

In 2012, Ribena released a new range of fortified juices named "Ribena Plus".

He repressurised the cabin, opened the helmet of his suit, and treated himself to a long, cold sip of fortified orange juice.

Vitamin D is also found in fortified orange juice, fortified soy milk, oily fish (such as salmon), egg yolks, and liver.

If you're drinking fortified juices or other beverages, be sure to shake them well before pouring, as the calcium often sinks to the bottom.

Along with eating calcium-rich whole foods like dark, leafy greens, look for fortified orange juice, breads, waffles, and soy milk.

"So if you drank five or six glasses of fortified orange juice and ate salmon every day, you would get all you need," Holick said.

Breakfast foods are a great start - fortified orange juice has up to 240 milligrams of calcium, and fortified cereals deliver up to 1,000 milligrams per cup.