Minerals support nerve signaling, muscle contraction, energy metabolism, immune function, bone structure, and fluid–electrolyte balance. Therefore, “mineral deficiency” rarely presents with a single hallmark symptom; the pattern depends on which mineral is low and for how long. Common non-specific clues include persistent fatigue, weakness, poor concentration, muscle cramps or twitching, dizziness, palpitations, brittle nails, increased hair shedding, dry skin, more frequent infections, and slow wound healing. Iron deficiency may progress to anemia with shortness of breath on exertion; low magnesium can be associated with cramps, tingling, or neuromuscular irritability; zinc deficiency may relate to impaired immunity, taste/smell changes, and delayed healing. A key caveat: these symptoms overlap with many other conditions (sleep problems, thyroid disease, chronic inflammation, mood disorders). If symptoms persist beyond 2–4 weeks, or if red-flags occur (fainting, chest pain, severe palpitations, black stools, unintentional weight loss), prompt medical assessment is warranted. Rather than trial-and-error supplementation, a diagnosis-first strategy is safer and more effective.\n\nSource note: NIH Office of Dietary Supplements (consumer fact sheets on minerals and deficiency patterns).