Topic
Bone strength
Bone density scans, fracture counts, and the blood markers of bone turnover.
This page is not a ranking. Ingredients appear in order of how much we have read here.
The 6 things measured here · ingredients read against each
Read here so far: 10 questions across 6 ingredients
Calcium
- Calcium and Fracture Risk (incidence)Two sources, all found no clear differenceModerate certainty, level 3 of 4
- Calcium and Bone Mineral Density (Femoral Neck)One source, measured higherModerate certainty, level 3 of 4
- Calcium and Bone Mineral Density (Lumbar Spine)One source, found no clear differenceModerate certainty, level 3 of 4
Collagen peptides
- Collagen peptides and Bone Mineral Density (Femoral Neck)One source, measured higherLow certainty, level 2 of 4
- Collagen peptides and Bone Mineral Density (Lumbar Spine)One source, measured higherLow certainty, level 2 of 4
Vitamin K2 (menaquinone-7)
- Vitamin K2 (menaquinone-7) and Bone mineral densityOne source, measured higherLow certainty, level 2 of 4
- Vitamin K2 (menaquinone-7) and Undercarboxylated osteocalcin (ucOC)One source, measured lowerLow certainty, level 2 of 4
Potassium
- Potassium and Bone Mineral Density (Lumbar Spine)Two sources, saying different thingsLow certainty, level 2 of 4
Vitamin B12
- Vitamin B12 and Bone mineral densityOne source, found no clear differenceLow certainty, level 2 of 4
Vitamin D
- Vitamin D and Bone HealthThree sources, all found no clear differenceModerate certainty, level 3 of 4
Where the sources say different things
Every side in full, because one line would have to pick one of them.
Each bar is one source’s range, drawn against the line of no difference: left of the line is lower, right is higher. Widths are not comparable between rows.
Potassium and bone Mineral Density (Lumbar Spine)
Two sources here, and they say different things: one measured higher bone Mineral Density (Lumbar Spine) and one found no clear difference.
One source’s range. The sources here say different things. Randomised trial, 2013 · 201 participants
How much of this is one source
Read from 12 sources. 7 of the 10 questions here rest on a single source with nothing yet to check them against, and on 1 question the sources say different things.
What is still to read is kept per ingredient, not per topic, so every ingredient named above carries its own list.
Still to read means nobody here has got to it, not that it was tried and did nothing or that no research exists. A pairing on no list is not a gap: we never set out to read it.
The other 14 topics
- Sleep28 questions · 11 ingredients
- Mood, stress and thinking33 questions · 17 ingredients
- Heart and blood pressure49 questions · 23 ingredients
- Cholesterol and blood fats65 questions · 24 ingredients
- Blood sugar and insulin45 questions · 20 ingredients
- Inflammation and oxidative stress37 questions · 21 ingredients
- Energy and exercise26 questions · 17 ingredients
- Joints, muscles and pain18 questions · 16 ingredients
- Hormones, thyroid and fertility27 questions · 11 ingredients
- Liver, kidney and digestion22 questions · 14 ingredients
- Skin, hair and nails7 questions · 4 ingredients
- Vitamin and mineral levels15 questions · 9 ingredients
- Body weight and composition16 questions · 11 ingredients
- Long-term health and immunity20 questions · 17 ingredients
This is a library, not advice. No recommendation, no dose, no diagnosis, no ranking. We never ask about your symptoms, and nothing here is tailored to you.