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Did you know indoor light impacts the nutritional quality of your milk?

April 18, 2019

From food and beverages, to pharmaceuticals and cosmetics, exposure to light can have a negative impact on some of your favourite products.

In particular, exposure to indoor light such as LED, artificial or fluorescent light can affect how quickly your food deteriorates and degrades. In one of our household favourites, milk, recent studies have shown that after just 15 minutes of exposure to artificial light the flavour of milk begins to change.

But what is it that indoor light does to our food and drink that we need to be aware of? A bit of science for you – in essence, light reacts with the vitamin compounds releasing a form of oxygen that interacts with other nutrients and increases the rate they breakdown. The more light, the more of this form of oxygen, the more your milk is affected.

We know milk is full of nutrients and a great source of calcium, proteins, and vitamins. It is one of the main reasons so many of us buy it, either for ourselves or for our children to help them stay healthy. So what does indoor light do to the nutrients in the milk we buy?

Vitamin A – essential for our sight

Milk is packed with Vitamin A which our bodies need to ensure we have healthy eyes and vision. But did you know when milk is exposed to indoor light the Vitamin A inside it begins to degrade? In fact, after just 16 hours of indoor light milk will have lost 49% of its Vitamin A.

Riboflavin – fuelling our energy

Riboflavin, also known as vitamin B2, plays a significant role in the production of energy. Milk is an essential source of Riboflavin with a 300g glass providing over 40% of our daily requirement of Riboflavin. However, after just one hour of sunlight exposure, riboflavin levels in pasteurized whole milk drop by 28%. It has also been show that after just 4 hours, exposure to LED light degrades essential B vitamins.

Vitamin D – keeping our bones healthy

Vitamin D is essential for the absorption of calcium in the body and in boosting our metabolism. However, it too is susceptible to light damage, with up to 80% of milk’s vitamin D lost in just 14 days of exposure to indoor light.

But there is an answer

Simply put, it’s the bottle. Milk bottles can now be light-protected to keep in all the nutrients you’d expect to find in your milk. At Noluma we test how well packaging protects your milk from light damage, and only certify those that offer a gold standard of protection so you can make a more informed choice. Fresh milk protected from light remains fresher, tastier and more nutritious for longer. What’s not to like?