The Dr. Gundry Podcast | EP 371.B

Episode Title: STOP Taking Calcium (do this instead) - Dr. G's Quick Health Tip
Date: September 25, 2025
Host: Dr. Stephen Gundry

Episode Overview

Dr. Stephen Gundry dives into the calcium conundrum, busting common myths about calcium supplements, dietary calcium, and bone health. He unpacks why calcium pills may be more harmful than helpful, explains the dangers of excessive dairy consumption, and offers practical, research-backed advice for truly protecting your bones and long-term health.

Key Discussion Points & Insights

The Calcium Myth: Supplements vs. Food Sources

• Calcium’s Role:
  • Yes, calcium is vital for bone structure—but there is no evidence that calcium supplements help ferry more calcium into bone.
    • “There is no evidence that a calcium supplement will actually have any benefit in making the calcium go to your bones.” (Dr. Gundry, 01:55)
• The Dangers of Calcium Supplements:
  • Supplements may actually be misdirected to blood vessels, increasing cardiovascular risk.
    • A 2020 analysis of 42 studies: Dietary calcium did not increase cardiovascular risk, but supplemental calcium did. (Dr. Gundry, 01:55)
  • Notable Quote:
    • “Don’t believe everything that you hear.” (Dr. Gundry, 02:41)
• Bone Fracture Research:
  • Meta-analysis of clinical trials: No evidence calcium supplementation lowers fracture risk in older adults.
    • “Calcium supplement did not lower your risk of fractures.” (Dr. Gundry, 02:43)

The Dairy-Bone Health Fallacy

• Milk Does Not Prevent Fractures:
  • Harvard study: 72,000 women, two decades—no proof milk prevents fractures or osteoporosis. (Dr. Gundry, 03:19)
  • Other large studies: More milk in teen boys correlated to higher fracture rates as adults.
  • Adolescent girls who consumed the most dairy were at greater risk for stress fractures.
    • “Exactly the opposite of what you would have thought.” (Dr. Gundry, 03:40)
• Dairy Problems:
  • US dairy often contains casein A1, a lectin-like molecule that can cause leaky gut.
  • Most people lose the ability to break down lactose after infancy; evolution doesn’t support lifelong dairy intake.
    • “The idea that we have to have it goes against our design, goes against our evolution.” (Dr. Gundry, 04:52)

Understanding Calcium Status in the Body

• Blood Tests Are Limited:
  • Calcium is tightly regulated in the blood; blood tests may not reflect true calcium stores.
    • “We will keep those electrolyte levels within a very narrow range…so looking at a serum calcium level…doesn’t really tell you how much calcium you have in your body.” (Dr. Gundry, 05:27)
• High Calcium Levels—What Really Causes Them:
  • Most high calcium in patients is due to benign parathyroid tumors (parathyroid adenoma) or supplement use.
    • Clinical Insight: Removing calcium supplements often normalizes levels if parathyroid hormone is normal.
    • “The first thing I do is ask them to stop taking their calcium supplement, and lo and behold…they come back to normal.” (Dr. Gundry, 07:04)

The Role of Vitamin D and K2

• Vitamin D Lowers Not Raises Calcium:
  • Low vitamin D → high parathyroid hormone → high calcium; supplementing with vitamin D lowers both.
    • “Vitamin D doesn’t raise calcium levels, it actually helps lower calcium levels by suppressing parathyroid hormone.” (Dr. Gundry, 08:54)
• Vitamin K2 & D3 Combo:
  • Vitamin K2 works with D3 to channel calcium into bones, away from arteries.
    • “There’s a fascinating study…showing that vitamin K2 supplementation in patients with coronary artery calcification, the coronary artery calcification went down by supplementing with vitamin K2.” (Dr. Gundry, 13:13)

Food Sources of Calcium

• Optimal Calcium-Rich Foods:
  • Green leafy vegetables: collard greens, spinach, turnip greens, bok choy, kale, broccoli.
  • Aged cheeses: parmesan, pecorino.
  • Fish (especially small fish with edible bones): anchovies, sardines (“…not boneless!”).
    • “If you’re really worried about calcium, get yourself some canned sardines or anchovies…” (Dr. Gundry, 10:01)
  • Populations with longevity (e.g., Acciarolis, Italy) eat small fish with bones daily.

Building & Maintaining Bone Health (Without Calcium Pills)

• Weight Training is Key:
  • Weight-bearing and high-impact exercise stimulates new bone formation.
    • “That’s one of the biggest stimuluses for you to strengthen your bones.” (Dr. Gundry, 10:36)
  • Research: Both kids (during growth) and adults (to prevent loss) benefit from lifting weights or strength training.
• Leaky Gut’s Role:
  • Gundry suggests osteopenia/osteoporosis are more often caused by leaky gut/endotoxemia than low dietary calcium.
    • “Most bone loss…is actually caused by leaky gut and by endotoxemia, not low dietary calcium.” (Dr. Gundry, 11:17)
• Vitamin C Is Essential:
  • Needed for bone and collagen formation; “some researchers believe…osteoporosis is scurvy of the bones.” (Dr. Gundry, 11:39)

Notable Quotes & Memorable Moments

| Timestamp | Speaker | Quote | |-----------|---------|-------| | 01:55 | Dr. Gundry | “There is no evidence that a calcium supplement will actually have any benefit in making the calcium go to your bones.” | | 03:40 | Dr. Gundry | “Exactly the opposite of what you would have thought.” (on higher fracture rates in teen milk drinkers) | | 04:52 | Dr. Gundry | “The idea that we have to have it goes against our design, goes against our evolution.” | | 07:04 | Dr. Gundry | “…lo and behold, the vast majority of them come back to normal when we check them again.” (after stopping calcium supplements) | | 08:54 | Dr. Gundry | “Vitamin D doesn’t raise calcium levels, it actually helps lower calcium levels by suppressing parathyroid hormone.” | | 10:01 | Dr. Gundry | “If you’re really worried about calcium, get yourself some canned sardines or anchovies, but make sure they’re the ones that are not boneless.” | | 11:17 | Dr. Gundry | “Most bone loss…is actually caused by leaky gut and by endotoxemia, not low dietary calcium.” | | 11:39 | Dr. Gundry | “Vitamin C is essential for bone formation and collagen formation. In fact, some researchers believe that osteopenia and osteoporosis is scurvy of the bones.” | | 13:13 | Dr. Gundry | “That’s why with my patients who are on a very good dose of vitamin D3, I always supplement with a low dose of vitamin K2 as well.” | | 13:44 | Dr. Gundry | “Please, please, please ditch the calcium supplements. If you really want to improve your bone health, do strength training. Get the wall of your gut intact. No more leaky gut.” |

Personal Story: Penny’s Bone Health Turnaround

• Dr. Gundry shares how his wife, Penny, a marathon runner who suffered from osteopenia, resolved her bone loss after switching from a standard runner’s diet (heavy in pasta, chips, and popcorn) to one focused on healing leaky gut.
  • “Imagine her shock when we changed her diet that her osteopenia completely resolved and has stayed resolved for over 30 years. 30 years just by changing her diet.” (Dr. Gundry, 14:26)
  • Key Insight: Her bone loss was caused by leaky gut, not calcium deficiency, and was reversed without supplements.

Practical Takeaways

• Stop calcium supplements unless personally directed by your doctor.
• Focus on getting calcium from bioavailable food sources, especially leafy greens, aged cheeses, and small fish with bones.
• Emphasize weight-bearing and strength training activities for bone health.
• Address gut health to prevent bone loss (follow Plant Paradox/Gut Check principles).
• Supplement with vitamin D and K2 as needed, and ensure adequate vitamin C.

Key Timestamps

• [01:55] Calcium myths & supplemental risks
• [02:43] Studies on milk and bone health, Harvard study
• [04:52] Evolutionary perspective on milk
• [07:04] High calcium causes—parathyroid adenoma & supplements
• [08:54] Vitamin D & parathyroid hormone regulation
• [10:01] Best food sources of calcium
• [10:36] Exercise for bone health
• [11:17] Leaky gut link to bone loss
• [11:39] Vitamin C and bone health
• [13:13] Vitamin K2 and coronary artery calcification
• [13:44] Dr. Gundry’s clinical recommendations
• [14:26] Penny’s story—diet heals bone loss

This episode delivers actionable, myth-busting advice on bone health, encouraging listeners to rethink supplements and focus on holistic lifestyle changes—emphasizing food, movement, gut integrity, and select vitamins as the real keys for strong, healthy bones.