Calcium

Calcium is considered a Macro-mineral because the body requires slightly higher doses of it. It is very important for having a healthy musculoskeletal system.

Calcium RDA (Recommended Dietary Allowance):

• Adults (19-50 years): 1,000 mg/day
• Men (51-70 years): 1,000 mg/day
• Women (51-70 years): 1,200 mg/day
• Adults (71+ years): 1,200 mg/day
• Pregnant and breastfeeding women: 1,000-1,300 mg/day

ODA (Optimal Daily Allowance):

• 1,200-1,500 mg/day (varies depending on individual needs, bone health goals, and activity levels)

Found in:

• Dairy products (milk, cheese, yogurt)
• Fortified plant-based milk (almond, soy, oat milk)
• Leafy green vegetables (kale, broccoli, bok choy)
• Fortified cereals and juices
• Sardines and salmon (with bones)
• Tofu (calcium-set)
• Almonds
• Seeds (chia, sesame)

Helps with:

• Building and maintaining strong bones and teeth
• Muscle contraction and relaxation
• Nerve signaling
• Blood clotting
• Regulating heart rhythm
• Supporting hormone secretion and enzyme activity

Insufficient doses:

• Symptoms of deficiency:
  • Muscle cramps and spasms
  • Numbness or tingling in fingers
  • Brittle nails
  • Fatigue
  • Osteopenia and osteoporosis (increased risk of fractures)
  • Dental issues (tooth decay)
• Severe deficiency can lead to hypocalcemia, characterized by abnormal heart rhythms, muscle weakness, and neurological symptoms.

Excessive doses:

• Upper limit: 2,500 mg/day for adults (19-50 years), 2,000 mg/day for adults (51+ years)
• Possible side effects of high doses:
  • Kidney stones
  • Hypercalcemia (high blood levels), which can cause nausea, vomiting, and confusion
  • Impaired absorption of other minerals like iron, zinc, and magnesium

Interactions:

• Synergy:
  • Works with vitamin D to enhance calcium absorption in the intestines.
  • Collaborates with magnesium and phosphorus for bone health.
  • Synergistic effects with vitamin K2 to direct calcium to bones and away from arteries.
• Antagonistic interactions:
  • High sodium intake can increase calcium excretion.
  • Excessive phosphorus (e.g., from soft drinks) can disrupt calcium balance.
  • High doses of this mineral may inhibit absorption of iron and zinc if taken simultaneously.
  • Certain medications (e.g., corticosteroids, proton pump inhibitors) can decrease its absorption or increase loss.