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Yeast extract is a concentrated paste made from yeast, used as a spread or flavouring. The figures here describe a mixed sample including Marmite and own-brand products. It provides protein and several B vitamins. Per 100g, it contains 41g of protein, 11g of salt, 15µg of vitamin B12 and 2620µg of folate.

Protein is needed for the growth and repair of body tissues. Vitamin B12 and folate help the body make red blood cells, and vitamin B12 also supports normal nerve function. Yeast extract has a high salt content, which is worth noting for people monitoring their salt intake. The amount consumed affects how much salt and other nutrients it provides. Full nutrient figures are in the tables below.

Nutrition per 100g

Nutrient

Per 100g

Energy

180 kcal

Energy

763 kJ

Fat

0.4g

Carbohydrate

3.5g

of which sugars

1.6g

Fibre

0g

Protein

41g

Salt

11g

Alcohol

0g

Water

27g

Cholesterol

0mg

Vitamins and minerals per 100g

Nutrient

Per 100g

Vitamin A (retinol equivalent)

0µg

Vitamin D

0µg

Vitamin C

0mg

Thiamin (B1)

4.1mg

Riboflavin (B2)

12mg

Niacin (B3)

64mg

Vitamin B6

1.6mg

Vitamin B12

15µg

Folate

2620µg

Calcium

70mg

Iron

2.9mg

Magnesium

160mg

Phosphorus

950mg

Potassium

2100mg

Sodium

4300mg

Zinc

2.7mg

Copper

0.2mg

Iodine

49µg

About these figures

Values are per 100g of the food as described (Mixed sample including Marmite and own brands). "Trace" means only a very small amount was found. Nutrients that were not measured are not shown. Salt is calculated from sodium.

Further reading and references

  • Public Health England. McCance and Widdowson's The Composition of Foods Integrated Dataset 2021. GOV.UK.

Article history

The information on this page is written and peer reviewed by qualified clinicians.
  • 4 Nov 2026 | Latest version
  • 3 Nov 2026 | Originally published