The extended question meat content

How is the percentage of content calculated? And can it be composed of collagen protein?

Meat content

In the United Kingdom, the terms ‘lean meat content’ and ‘meat content’ are used as compositional characteristics for meat . The “lean meat content” is the percentage of raw lean meat, free of visible fat, in the or the content of lean meat raw material that has been processed. The meat content is the total percentage of meat, including fat (and possibly bone), calculated as raw meat that has been used as an ingredient in the preparation of the product.

Methodology calculating meat content

The determination is based on the method of Stubbs and More. One starts from the nitrogen factor F, the average nitrogen content of the processed lean meat raw material, calculated on the fat-free matter. From the analytical nitrogen content of the meat product found, one calculates the lean meat content:


%fat free meat= 100(% nitrogen/F)

The meat content is calculated by adding the analytical fat content of the product to the lean meat content: “meat content”=% lean meat + % fat = 100(% nitrogen/F) + % fat

Usually, the “fat-free meat” percentage calculated according to the former formula is called the “lean meat” content in our country. In fact, it is not. What is calculated here is ‘completely fat-free meat’, while the English definition defines ‘lean meat’ as ‘meat-free of visible fat’, which will be a few per cent more.

Nitrogen factor table

The nitrogen factor F depends on the product’s type(s) of meat raw material. Known values are as follows:

– breast meat3.90
– dark meat3.60
-entire carcass3.70
Turkey Meat
– breast meat3.90
– dark meat3.50
-entire carcass3.65
– of unknown origin3.55
– beef liver3.45
– pork liver3.65
Pig’s Blood3.20

Composite Meat Products

If mixtures of several meat raw have been used in unknown proportions, one usually takes the average of the relevant factors. When calculating the fat-free meat content or the meat content, only the meat nitrogen content (= the percentage of meat protein divided by 6.25) is taken into account. If protein-containing binders (e.g., non-meat proteins such as caseinate or soy protein) or other non-meat containing protein or nitrogen have been used in product preparation, then the total nitrogen content should be reduced by the nitrogen contribution from the non-meat ingredients.

Single product calculation

aangenomen: het betreft een product bereid uit meat content’=100(2,88/3,45) %+6,0%=89,5%

Composite product calculation

aangenomen: het product is bereid uit varkens- en en bevat als bindmiddel 1% vleesvreemd eiwit met een stikstofgehalte van 15% stikstoffactor F=(3,45+3,55)/2=3,50 vleesstikstofgehalte = 2,08% – 0,01 x 15%=1,93% ‘meat content’=100(1,93/3,50) %+32,0%=87,1%

Special Cases

For products that lose a lot of moisture during the cooking process or are prepared from pre-cooked (e.g. corned beef), the found ‘meat content’ can be more than 100%. It should be noted that it is not the percentage of ‘cooked meat’ that is calculated, but the amount of raw material that is the basis for it (the ‘ingoing raw meat’).

Certain types of single products (e.g. bacon, cooked ham and shoulder) require a calculation of the percentage of ‘added ’ in the UK. This content is derived from the ‘meat content’ and the sum of the percentages of added additives (other than water):

% ‘added water’ =100%-‘meat content’-% added additives

The total content of added excipients should include, for , , added phosphate, and nitrate (usually negligible) and (flour and sugars).

Calculation example (Table 1)

  • single product:
    • assumed: prepared from pork (see preceding calculation example)
    • meat content =89.5%
    • added phosphate, calculated as pentasodium triphosphate = (0.60-0.0243 x 18.0) % x 1.73 = 0.28
    • % “added water” =100%-“meat content – (contents of added phosphate, salt and carbohydrates) =100% – 89.5% – 0.28% – 3.0% – 1.0% = 6.2%.


In some (including those for smoked sausage), the collagen-free meat protein content is used as a -defining characteristic. It represents the percentage of ‘muscle protein’ in the product and is defined as the crude protein content (%total nitrogen x6.25) minus the percentage of connective tissue protein (% collagen protein=% hydroxyproline x 8)

Related articles to How do you calculate meat content in percentages?

Many customers and visitors to this page 'How do you calculate meat content in percentages?' also viewed the articles and manuals listed below:

We are a Food Tech firm in Food Safety Compliance. Experts in setting up and maintaining Food Safety Systems for companies in the Food Supply Chain. We are dedicated to breaking down the barriers for Transparency and Trust in the Global Food Supply Chain.
In our Partnership Program we would like to work together with (Non)Governmental Organizations, Universities, Multinationals and Food companies.

iMIS Food is a fully equipped Food Safety Compliance platform. Unique is the installation of an iMIS Food server at the Food company, for online and offline availability. The online (no travel costs) iMIS Food implementation process includes 6 to 10 days of support and has a lead time of 3 months.

Monthly iMIS Food Update

Would you also like to receive the monthly iMIS Food Update and be invited to our events? Then please fill in this form.

Food Safety news 11-2022

iMIS Food server FOGA

FOGA Organic Gum implementing iMIS Food Global

FOGA Organic Gum from Sudan started the implementation of iMIS Food Global. The iMIS Food server in Rotterdam is set up for FSSC22000 certification.
Youth world food day

Visiting Youth World Food Day 14th of October

There will be a great discussion about food at the Youth World Food Day. Food security, sustainability and awareness are essential topics every age to discuss. 

GMP Online Webinar for African SMEs/Smallholders

To enable SMEs in East Africa Good Manufacturing Procedures are key to maintain the quality of the food products and the power of the enterprises.