It has been recommended for years to use artificial sweeteners to reduce caloric intake and therefore reduce weight. This is no longer the case, the World Health Organization
(WHO) does not recommend the use of non sugar sweeteners NSS, also known as artificial sugars, to control body weight or diseases. According to research there is no evidence that says the use of non sugar sweeteners help in reducing body fat in adults or children. In fact, the use of NSS may have “potential undesirable effects from long term use” such as an increase in the “risk of type 2 diabetes, cardiovascular disease and mortality in adults”.
WHO does suggest reducing the intake of sugar with unsweetened food and beverages. Foods with non sugar sweeteners can be replaced with foods that have naturally occurring sugars such as fruit which have more nutritional value.
Be aware of foods that say "sugar free" or "no sugar added". These foods typically have artificial sugars in their ingredients.
Replace non sugar sweetened foods with whole foods, plant foods.
Reference - World Health Organization. 15 May 2023 “WHO advises not to use non-sugar sweeteners for weight control in newly released guideline”
https://www.who.int/news/item/15-05-2023-who-advises-not-to-use-non-sugar-sweeteners-for-weight-control-in-newly-released-guideline