Alpha Progression
Sugar substitutes
Also known as: Sweeteners
Sugar substitutes are ingredients used to provide sweetness while replacing some or all of the sugar in a food or drink. "Sweetener" covers substances with very different chemistry and effects, so the ingredient and dose matter more than the category name.
High-intensity sweeteners such as aspartame, sucralose, saccharin, acesulfame K, and steviol glycosides provide intense sweetness in small amounts and contribute little or no energy at typical use levels. Polyols, or sugar alcohols, such as xylitol, sorbitol, maltitol, and erythritol are bulk ingredients. They can provide some energy and texture as well as sweetness. Large amounts of certain polyols may cause gas, bloating, or diarrhea, with substantial variation between people.
People with phenylketonuria need to restrict phenylalanine and must follow the warning on aspartame-containing products; EFSA notes that the general acceptable daily intake for aspartame does not apply to this group.
Replacing a sugar-sweetened drink with a low-energy alternative can reduce calories and available carbohydrate in that specific swap. It does not guarantee weight loss, improve the rest of the diet, or make the finished product carbohydrate-free. A protein bar, powder, or tabletop blend may contain other energy-yielding ingredients, and different substitutes need not have identical effects on blood glucose. The nutrition label and ingredient list are therefore more informative than claims such as sugar-free or natural.
In the European Union, authorized food-additive sweeteners are assessed for safety and must appear on the label by name or E number; EFSA maintains the current assessment status. An acceptable daily intake is a long-term safety benchmark with a safety margin, not a recommended target. It also addresses a different question from whether sweeteners help with weight control. The World Health Organization's guideline on non-sugar sweeteners concerns long-term disease and weight outcomes rather than toxicological safety; its recommendation does not apply to polyols or to people with pre-existing diabetes.
For training, sugar substitutes are mainly a preference or energy-management tool. They do not directly build muscle or improve performance. Someone pursuing a calorie deficit may find a lower-energy option useful, while another person may prefer regular sugar around demanding exercise or avoid a particular polyol because of stomach discomfort.
