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What is bone marrow and why does it matter?
Bone marrow is found inside the large bones (femur, tibia, humerus) of animals, especially in beef. It consists of a mixture of healthy fats, collagen, glycoproteins, minerals and stem cells.
It is literally a “biological factory” that produces:
- Immune cells (white blood cells)
- Red cells (oxygenation)
- Platelets (healing)
- Precursors of the lymphatic system
🔍 Nutritional composition (per 100g cooked marrow)
🧠 Health benefits
1. Supports intestinal health
The marrow is rich in glycine and collagen — two key components for the regeneration of the intestinal mucosa. It can help in conditions such as leaky gut syndrome (“leaky gut”).
2. Reduces inflammation
Fatty acids in the marrow (especially monounsaturated) contribute to the reduction of systemic inflammation. Glycine is a natural anti-inflammatory.
3. Supports joint and skin health
Collagen and amino acids in the marrow help to make the skin elastic, lubricate the joints and regenerate connective tissues.
4. Excellent source of fat-soluble vitamins
Vitamin A (retinol), K2 and E are essential for vision, bones and the cardiovascular system — and the marrow contains them in active form.
5. Help for the immune system
Iron, zinc and phosphorus support immunity, oxygenation and cell regeneration.
🍽️ How to cook it correctly
🥄 In the oven (classic version)
- Place the bones vertically in a tray.
- Sprinkle with salt, pepper, optionally rosemary or garlic.
- Bake at 200°C for 15—20 minutes.
- Serve with toast (or vegetables) and balsamic vinegar.
🔥 On the grill (for a more intense taste)
- Cut the bones lengthwise.
- Put the marrow side up, on the grill.
- Cook indirectly, covered, ~15 min until soft.
- Serve immediately — cools quickly.
💡 Tip: Serve with a little apple cider vinegar — the acid helps metabolize fat.
🔬 What do the studies say?
- Glycine(an amino acid in the marrow) has been associated with anti-inflammatory and neuroprotective effects [PubMed ID: 25082076]].
- Collagenanimal sources can help reduce joint pain and improve skin elasticity [Journal of Clinical Nutrition, 2019]].
- Diets rich in natural saturated fats(from marrow, butter, ghee) may have metabolic benefits when combined with fasting [Cell Metabolism, 2020]].
📌 When to consume it in intermittent fasting?
The marrow is perfect for the feeding window, especially after longer periods of fasting (>20 hours). It provides a boost of healthy fats and micronutrients that help rebalance the mineral and support regeneration.
Conclusion
Bone marrow is not just tasty — is a concentrate of benefits for the skin, joints, immunity and digestion. If you practice intermittent fasting, putting it into your eating window can be a major upgrade for your metabolic health.
No, if consumed in moderate portions. Fats in the marrow are energetically dense, but do not stimulate insulin and provide long-lasting satiety.
Oh, absolutely. It is one of the most “keto-friendly” sources of fat and collagen.
It is safe if it comes from clean sources (naturally raised beef, without hormones). However, due to the high fat content, we recommend eating 2-3 times a week.
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