Lactic Acid Fermentation Equation, Reactants, and Products

the equation of lactic acid fermentation

Lactic acid fermentation equation is of great importance as it says the total pathway or process of lactic acid fermentation in a short sentence.

Lactic acid fermentation equation and reactants:

The Lactic acid fermentation equation is usually described as.

Glucose ­­­­­­­+ ADP + NADH → Lactic acids + ATP + NAD+.

Although the lactic acid fermentation equation must be written more clearly to make good sense.

the equation of lactic acid fermentation

In Figure 1, you can see the lactic acid fermentation equation where lactic acid fermentation occurs in two steps.

the equation of lactic acid fermentation
Figure 1: Two-step Process of Lactic Acid Fermentation

In the first step, Glucose is converted to pyruvic acids through the glycolysis process. In glycolysis, 2 ADP and 2NAD+ are converted to 2 ATP and 2NADH.

In the second step, pyruvic acid is converted to lactic acid with the conversion of 2NADH to 2NAD+. In this step, NAD+ is regenerated to continue the glycolytic process.

Therefore, the lactic acid fermentation equation is written as the following formula.

Glucose ­­­­­­­+ 2ADP +2NAD+ → Pyruvic acid + 2 ATP +2NADH; Pyruvic acid + 2NADH → Lactic acids + 2 NAD+.

  • The lactic acid fermentation reactants are Glucose, ADP, NADH. Other carbohydrates such as lactose, maltose, etc are also involved in lactic acid fermentation.
  • The lactic acid fermentation products are lactic acid, ATP, NAD+. There is a large collection of products of lactic acid fermentation that are given on our website.
  • Pyruvic acid is an intermediate product of both alcoholic and lactic acid fermentation. But it is an end product of glycolysis.

But there are several equations of Lactic acid fermentation, as lactic acid is produced in different ways.

In homolactic pathway, lactic acid fermentation equation is

Glucose + 2 ADP + 2 Pi → 2 lactate + 2 ATP.

In heterolactic pathway, lactic acid fermentation equation is

Glucose + ADP + Pi → lactate + ethanol + CO2 + ATP.

In Bifidium pathway, lactic acid fermentation equation is

2 glucose + 5 ADP + 5 Pi → 3 acetate + 2 lactate + 5 ATP.

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1 thought on “Lactic Acid Fermentation Equation, Reactants, and Products”

  1. Glucose ­­­­­­­+ ADP + NADH → Lactic acids + ATP + NAD+.
    This equation gives the all answers. This equation says about both the reactants and products of lactic acid fermentation.

    Thank you for this article. It is the article I really searched for.

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