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Vitamins & minerals · FROM DR. PURSER’S TEACHING

Calcium

Provides structure for bones and teeth and supports muscle and nerve signaling.

Based on teaching by Dan Purser, MD. How we prepare these guides

Updated Sep 23, 2026 · Educational reference

THE TEACHING CONNECTION

Provides structure for bones and teeth and supports muscle and nerve signaling.

What it does

Provides structure for bones and teeth and supports muscle and nerve signaling.

Possible deficiency symptoms

Long-term low intake can affect bones without obvious symptoms. Low blood calcium has multiple causes and is not equivalent to low dietary intake.

How supplementation is approached

Start with dietary calcium, the reason for supplementation and the bone-health assessment. When calcium is part of Dr. Purser’s plan, his course separates its schedule from morning vitamin D and places calcium at bedtime. This is a clinic scheduling approach, not a claim that the two nutrients cannot be absorbed together.

Food sources

Milk; yogurt; calcium-set tofu; fortified plant drinks; canned fish with edible bones; kale.

Supplement forms

Calcium carbonate and calcium citrate.

What to track and reassess

Confirm the elemental calcium amount, other calcium-containing products and spacing from medicines such as thyroid replacement or certain antibiotics with the pharmacist.

From starting support to follow-up

If you and your clinician start a CMA replenishment plan, you may add one new product at a time, often waiting 3–7 days to see how you feel. A check-in is usually planned near ten weeks during an approximately 100-day period. Follow your written plan for amounts and timing. At follow-up, you may continue, change, or stop each item. This timetable does not automatically end longer-term support.

Names you may see

Calcium