Phytic acid, abundant in whole grains, beans, nuts, and seeds, is a double-edged compound whose strong grip on minerals explains both its drawbacks and its promise. It lowers iron and zinc absorption — a real concern mainly for those with fragile stores — while the same binding may help prevent kidney stones and slow calcium buildup in arteries. Other benefits remain uncertain. (Full Review)
| Marker | Target | Why |
|---|---|---|
| Serum Ferritin | 50–150 ng/mL | Tracks iron stores, the main safety and target variable |
| Serum Iron & Transferrin Saturation | Transferrin saturation 25–35% | Detects iron depletion or overload beyond stores |
| Serum Zinc | 90–130 µg/dL | Zinc is the mineral most predictably lowered by phytate |
| Red-Blood-Cell Magnesium | 5.0–6.5 mg/dL | More sensitive index of magnesium status than serum |
| Serum Calcium | 9.0–10.0 mg/dL | Screens calcium balance relevant to bone |
| Hemoglobin / CBC | 13.5–15.0 g/dL (men); 12.5–14.5 g/dL (women) | Detects anemia arising from impaired iron absorption |
Cadence: Baseline, again at ~3 months, then every 6–12 months; earlier if deficiency symptoms appear