Protein bars are convenience food that contain a high proportion of

protein Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residue (biochemistry), residues. Proteins perform a vast array of functions within organisms, including Enzyme catalysis, catalysing metab ...

relative to

carbohydrates A carbohydrate () is a biomolecule composed of carbon (C), hydrogen (H), and oxygen (O) atoms. The typical hydrogen-to-oxygen atomic ratio is 2:1, analogous to that of water, and is represented by the empirical formula (where ''m'' and ''n'' ma ...

and fats. Despite the label focusing on protein, many mass-marketed protein bars contain more

added sugar Added sugars or free sugars are sugar carbohydrates (caloric sweeteners) added to food and beverages at some point before their consumption. These include added carbohydrates ( monosaccharides and disaccharides), and more broadly, sugars nat ...

than some desserts like cookies or doughnuts, making them more like candy bars. The source of protein may be animal, e.g., whey (vegetarian) or

collagen Collagen () is the main structural protein in the extracellular matrix of the connective tissues of many animals. It is the most abundant protein in mammals, making up 25% to 35% of protein content. Amino acids are bound together to form a trip ...

, or plant (e.g., pea protein, or peanut).

Dietary purpose

Protein bars are targeted to people who primarily want a convenient source of protein that does not require preparation (unless homemade). There are different kinds of food bars to fill different purposes.

Energy bar Energy bars are supplemental bars containing cereals, micronutrients, and flavor ingredients intended to supply quick food energy. Because most energy bars contain added protein (nutrient), protein, carbohydrates, dietary fiber, and other nutri ...

s provide the majority of their

food energy Food energy is chemical energy that animals and humans derive from food to sustain their metabolism and muscular activity. Most animals derive most of their energy from aerobic respiration, namely combining the carbohydrates, fats, and protein ...

(

calories The calorie is a unit of energy that originated from the caloric theory of heat. The large calorie, food calorie, dietary calorie, kilocalorie, or kilogram calorie is defined as the amount of heat needed to raise the temperature of one liter o ...

) in carbohydrate form. Meal replacement bars are intended to replace the variety of nutrients in a meal. Protein bars are usually lower in

than energy bars, lower in

vitamins Vitamins are organic molecules (or a set of closely related molecules called vitamers) that are essential to an organism in small quantities for proper metabolic function. Essential nutrients cannot be synthesized in the organism in suff ...

and dietary

minerals In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid substance with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form.John P. Rafferty, ed. (2011): M ...

than meal replacement bars, and significantly higher in protein than either. Protein bars may contain high levels of

sugar Sugar is the generic name for sweet-tasting, soluble carbohydrates, many of which are used in food. Simple sugars, also called monosaccharides, include glucose Glucose is a sugar with the Chemical formula#Molecular formula, molecul ...

and sometimes are called "

candy bar A candy bar is a type of portable candy that is in the shape of a bar. The most common type of candy bar is the chocolate bar, including both bars made of solid chocolate and combination candy bars, which are candy bars that combine chocolate wi ...

s in disguise". Alternative protein bars may use insect protein as an ingredient.

Vegan Veganism is the practice of abstaining from the use of animal products and the consumption of animal source foods, and an associated philosophy that rejects the commodity status of animals. A person who practices veganism is known as a ve ...

protein bars contain only plant-based proteins from sources like peas, brown rice, hemp, and

soybean The soybean, soy bean, or soya bean (''Glycine max'') is a species of legume native to East Asia, widely grown for its edible bean. Soy is a staple crop, the world's most grown legume, and an important animal feed. Soy is a key source o ...

s. Protein bars are mainly marketed to athletes or exercise enthusiasts for muscle building or as a wellness-themed convenience food. The global market is growing and expected to reach US$2 billion in annual sales in 2026. There is a disagreement over the amount of protein required for active individuals and athletic performance. Some research shows that protein supplementation is not necessary. Athletes generally consume higher levels of protein as compared to the general population for muscular hypertrophy and to reduce lean body mass lost during weight loss. Specialists have stated that the general American population is not lacking in protein.

History

Bob Hoffman launched Hoffman's Hi-Proteen Fudge and Hoffman's Hi-Proteen Cookies in the early 1950s, and competitor

Joe Weider Josef Weider (; November 29, 1919 – March 23, 2013) was a Canadian bodybuilder and entrepreneur who co-founded the International Federation of BodyBuilders (IFBB) alongside his brother Ben Weider. He was also the creator of Mr. Olympia, Ms. Ol ...

launched Candy Food Bars with bodybuilder Dave Draper on the packaging in the late 1960s. Pillsbury Space Food Bars and the bars by Tiger's Milk both came to market in the 1960s. Though they had protein, they were marked as energy or nutrition bars. PowerBar, invented in California in 1986, was an early protein bar.

References

{{reflist Bodybuilding supplements Snack foods Proteins as nutrients