The move will see around 7,500 tonnes of sugar removed from a number of well-known brands.
The firm said the changes will largely be achieved by replacing sugar with higher quantities of existing ingredients or other, non-artificial ingredients, while ensuring products are below a certain amount of calories.
Continuing investment in research and development will also deliver new technology and innovation to further improve products in the future, it said.
The firm has a number of factories across the country including in Cumbria, Newcastle-Upon-Tyne, West Yorkshire, and York.
Fiona Kendrick, chairman and chief of Nestlé UK and Ireland, said: “Our confectionery brands have been enjoyed in the UK for more than a century and we know that if we can improve these products nutritionally, provide more choice and information for the consumer, together with other categories, we can have a significant impact on public health.
“Nestlé is at the forefront of efforts to research and develop new technology that makes food products better for our consumers. These innovations will help us to reduce sugar in confectionery when they are combined with other, more common methods like reformulating recipes and swapping sugar for other, non-artificial ingredients.”
She continued: “Making these improvements to our products is key to us delivering better choices for our consumers while retaining the same great taste that they know and love.”