Vitamins do not provide energy directly (as they contain no calories), but they are essential for helping the body function properly and for converting food into energy.

noli's read

Marine Lorphelin is entirely correct: from a physiological perspective, vitamins do not provide calories and therefore do not supply direct energy to the body. This fuel-providing role is exclusively reserved for macronutrients (carbohydrates, fats, proteins) derived from our diet. On the other hand, vitamins are essential components: a scientific review published in Nutrients (Kennedy, 2016) reiterates that vitamins (notably those in the B group) act as essential cofactors to help our cells convert these macronutrients into usable energy. Furthermore, the European Food Safety Authority (EFSA), through its scientific opinions based on expert consensus, officially confirms that several vitamins (such as vitamin C, B6, or B12) contribute to normal energy-yielding metabolism and the reduction of fatigue. Regarding vitamin C and immunity, meta-analyses of randomized clinical trials (RCTs), such as that of the Cochrane collaboration (Hemilä & Chalker, 2013), confirm its role in providing functional support for our defenses. This clear distinction helps to avoid the illusion of an immediate "energy boost" often falsely promised by vitamin supplements.

the sources

No named source held this one up — that absence is part of the verdict.