Intra- and interspecific mineral composition variability of commercial instant coffees and coffee substitutes: Contribution to mineral intake

► Evaluation of instant coffee substitutes mineral content. ► Overall reduced contribution to the daily mineral intake. ► Instant coffees are generally richer in minerals than instant coffee substitutes. ► Mg amounts might potentially be used for coffee estimation in the blends. ► High-resolution continuum source atomic absorption spectrometry was used with positive outcomes.