How much salt is in a stick of butter? (why butter contains salt)

In this article, we will answer the question “How much salt is in a stick of butter?” and discuss how much salt butter contains, what are the types of butter and what are the benefits and drawbacks of adding salt to butter.

How much salt is in a stick of butter?

The amount of salt in a stick of butter varies with the brand of the butter stick that you are going to use. Officially, the amount of salt added to butter making is between 0.75 to 2.5 %, however, most of the salted butter in the United States contains 1.5 % salt or less (1).

In general, one stick of butter is equivalent to 4 ounces or 113 g. This means the salt content is generally 1.7 g (0.06 oz) but can vary between 0.8 g (0.028 oz) to 2.8 g (0.1 oz), depending on the type and brand.

Therefore, to know exactly how much salt the butter contains, it is necessary to read the label carefully regarding the nutritional information of the product (2).

What are the types of butter?

There are many types of butter and the definition of butter varies, depending on the country. For instance, in the United States butter should have a minimum of 80 g of milk fat in 100 g of product and no more than 16 g of moisture (2).

This definition is similar in other countries, such as Japan and Australia. In the European Union, butter should have a minimum of 82 % of milk fat in unsalted butter and a minimum of 80 % of milk fat in salted butter. Reduced-fat butter is defined as having 60 % and half-fat as having 39 % of milk fat in the composition.

Unsalted butter contains only fresh pasteurised milk cream as a starter ingredient. Milk cream is churned and dehydrated to obtain butter. Salted butter is added by salt and has a longer shelf life after the removal of excess buttermilk (3).

In the United States, there is also butter grading to define the quality. Grade AA butter distinguishes a product with high quality and butter with improved pleasing flavour.

Cultured butter is obtained by adding a lactic acid culture to the sweet cream before its churning. This results in a butter with improved aroma due to the formation of volatiles related to diacetyl, which are characteristic of the product (1). 

What are the benefits of adding salt to butter?

The most important benefit of adding salt to butter is the improvement of the shelf life, in addition to the improvement of the flavour. Salt is a flavour enhancer and is appreciated in butter. However, its use is important mostly due to safety reasons.

While unsalted butter has a shelf life of about 2 weeks in the refrigerator and 5 months in the freezer, salted butter has a shelf life of 2 months in the fridge and 6 to 9 months in the freezer (2).

Salt is effective in suppressing the growth of many microorganisms and is used as a food preservative. Salt can inhibit most yeasts and moulds, but cannot eliminate the total viable psychrotrophic bacteria or some pathogens, such as Listeria monocytogenes, which can grow in water even at temperatures below 40 °F (5 °C) (3).

Therefore, high hygienic conditions are required to produce butter and prevent microbial contaminations and spoilage. Unsalted butter, on the other hand, can support the growth of Escherichia coli, Salmonella, Listeria monocytogenes and yeasts.

What are the drawbacks of adding salt to butter?

The drawback of adding salt to butter is related to the risk of the ingestion of high amounts of sodium. A diet that includes foods containing high levels of sodium is related to a higher incidence of hypertension in the population (4).

Hypertension can lead to other negative health outcomes, such as heart stroke and heart disease, which are both important causes of death in many countries.

Health authorities recommend the reduction of sodium in the diet to reduce the death number as a consequence of a bad diet containing high quantities of salt. 

Butter is considered a food with a high concentration of salt and its consumption should be limited. Alternatively, the addition of salt to butter should be reduced, according to the recommendation of health professionals. 

Other FAQs about Salt that you may be interested in.

How to dissolve salt?

How to get salt out of cooked meat?

Conclusion:

In this article, we answered the question “How much salt is in a stick of butter?” and discussed

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References

1.-

Clark S, Costello M, Drake M, Bodyfelt F, editors. The sensory evaluation of dairy products. Springer Science & Business Media; 2009 Jul 30.

2.-

Lee CL, Liao HL, Lee WC, Hsu CK, Hsueh FC, Pan JQ, Chu CH, Wei CT, Chen MJ. Standards and labeling of milk fat and spread products in different countries. journal of food and drug analysis. 2018 Apr 1;26(2):469-80.

3.-

Budhkar YA, Bankar SB, Singhal RS. Microbiology of cream and butter. Encyclopedia of food microbiology. 2014;1:728-37.

4.-

Karppanen H, Mervaala E. Sodium intake and hypertension. Progress in cardiovascular diseases. 2006 Sep 1;49(2):59-75.