Omeprazole Side Effects & Health Impacts

Chronic low calcium intake impairs bone mineralization and may contribute to lower bone mineral density and increased fracture risk, especially when combined with low vitamin D.

Systematic reviews indicate that increasing calcium intake yields only modest BMD gains and limited fracture risk reduction by itself, but combined calcium and vitamin D supplementation has shown benefits in specific high-risk groups such as postmenopausal women with osteoporosis.

Tai V et al. Calcium intake and bone mineral density: systematic review and meta-analysis. BMJ. 2015;351:h4183.; Liu Y et al. The effect of calcium supplementation in people under 35 on bone mass: a systematic review and meta-analysis. eLife. 2022;11:e79002.; Cong B, Zhang H. Effects of combined calcium and vitamin D supplementation on bone mineral density and fracture risk in postmenopausal women: a systematic review and meta-analysis. BMC Musculoskelet Disord. 2025;26:9089.

Marked hypocalcemia increases neuromuscular excitability, leading to perioral tingling, paresthesias, carpopedal spasms and, in extreme cases, tetany or seizures.

Clinical endocrinology sources describe neuromuscular irritability as a classic manifestation of severe hypocalcemia due to inadequate intake, malabsorption or drug-induced changes in calcium metabolism.

Bilezikian JP. Hypocalcemia. J Clin Endocrinol Metab. 2018;103(10):3827-3839.; Khan AA et al. Diagnosis and management of hypocalcemia. Endocrinol Metab Clin North Am. 2018;47(4):753-766.

B12 depletion impairs DNA synthesis in rapidly dividing cells, leading to macrocytic (megaloblastic) anemia, fatigue, pallor and, in severe cases, pancytopenia.

Clinical reviews identify vitamin B12 deficiency as a common cause of megaloblastic anemia; hematologic abnormalities often improve with replacement, underscoring the hematopoietic consequences of depletion.

Langan RC, Zawistoski KJ. Update on vitamin B12 deficiency. Am Fam Physician. 2017;96(6):384-389.; Green R. Vitamin B12 deficiency from the perspective of a practicing hematologist. Blood. 2017;129(19):2603-2611.

Sustained B12 deficiency damages myelin in the peripheral and central nervous system, resulting in paresthesias, gait disturbance, impaired proprioception and cognitive or mood changes.

Systematic reviews and observational data show associations between low B12 levels and peripheral neuropathy, myelopathy and cognitive impairment; neurological manifestations may become irreversible if depletion is prolonged.

Badar A et al. Neuropsychiatric disorders associated with vitamin B12 deficiency: an updated review. Cureus. 2022;14(2):e22052.; Dekker MJHJ et al. Vitamin B12 deficiency-induced neuropathy and cognitive impairment. J Nutr Gerontol Geriatr. 2024;43(1):1-15.; NHS. Vitamin B12 or folate deficiency anaemia – complications. 2017.

Severe vitamin C depletion disrupts collagen hydroxylation, leading to fragile blood vessels, bleeding gums, easy bruising, corkscrew hairs, poor wound healing, anemia and, in advanced cases, scurvy.

Modern case reports and re-analyses of classic scurvy trials show that vitamin C deficiency causes defective collagen and capillary integrity, with slow recovery of scar strength even after repletion if deficiency is prolonged.

Gandhi M et al. Scurvy: rediscovering a forgotten disease. Clin Case Rep. 2023;11(6):e10296835.; Hujoel PP, Hujoel MLA. Vitamin C and scar strength: analysis of a historical trial. Am J Cardiol. 2022;129(1):106-112.; Vissers MCM, Das AB. Re-opening old wounds—vitamin C and wound healing. Am J Clin Nutr. 2022;115(4):795-796.

Moderate vitamin C depletion reduces collagen deposition and antioxidant capacity, which can manifest as slower wound healing, arthralgia and fatigue even before overt scurvy develops.

Systematic reviews report improved healing of chronic wounds with vitamin C supplementation in deficient or high-need states, supporting the clinical impact of inadequate ascorbate on tissue repair.

Bechara N et al. The role of vitamin C in tissue repair and wound healing: a systematic review. Int Wound J. 2022;19(5):1143-1160.; Pope M et al. Scurvy: an elusive diagnosis. Clin Case Rep. 2023;11(4):e7418.

Magnesium depletion destabilizes neuromuscular transmission and ATP-dependent muscle relaxation, which can cause muscle cramps, tremors, weakness and restless legs.

Clinical reports and modern reviews note that hypomagnesemia is associated with muscle cramps and spasms; mechanistic work links low magnesium to impaired ATP handling and sustained muscle contraction.

Bilbey DL, Prabhakaran VM. Muscle cramps and magnesium deficiency: case reports. Can Fam Physician. 1996;42:1471-1473.; Souza ACR et al. The integral role of magnesium in muscle integrity and function. Nutrients. 2023;15(24):5127.; Kothari M et al. A comprehensive review on understanding magnesium deficiency. Nutr Rev. 2024;82(5):987-1005.