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10.1111/j.1740-8709.2012.00418.x [DOI] [PMC free article] [PubMed] [Google Scholar] 39
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When someone is genuinely deficient, they may notice improvement in energy or mental clarity within a few days, though this varies from person to person and is most likely in people who were low to begin with

In fact, it ranked as the second most common symptom reported by Reddit users, despite appearing less prominently in many clinical trials

They can include fluid retention, weight gain, drowsiness, constipation, dry mouth, and difficulty concentrating

Clients often describe: Physical exhaustion, even after sleep Brain fog or trouble concentrating Mood swings or anxiety Tingling in fingers or toes Headaches or light-headedness Pale skin or brittle nails Sometimes its subtle like feeling off, or noticing that your motivation is missing

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