Topic
Vitamin and mineral levels
The blood level of a vitamin or mineral, and the enzymes that depend on one.
This page is not a ranking. Ingredients appear in order of how much we have read here.
The 13 things measured here · ingredients read against each
Read here so far: 15 questions across 9 ingredients
Biotin (vitamin B7)
- Biotin (vitamin B7) and Acetyl-CoA carboxylase activityOne source, measured higherVery low certainty, level 1 of 4
- Biotin (vitamin B7) and Propionyl-CoA carboxylase activityOne source, measured higherVery low certainty, level 1 of 4
- Biotin (vitamin B7) and Pyruvate carboxylase activityOne source, measured higherVery low certainty, level 1 of 4
Iron
- Iron and FerritinOne source, measured higherModerate certainty, level 3 of 4
- Iron and HemoglobinOne source, measured higher, and one source carries a noticeModerate certainty, level 3 of 4
- Iron and Transferrin Saturation (TSAT)One source, found no clear differenceModerate certainty, level 3 of 4
Copper
- Copper and Serum copperOne source, found no clear differenceLow certainty, level 2 of 4
- Copper and CeruloplasminOne source, measured higherVery low certainty, level 1 of 4
Folate
- Folate and Folate (serum)One source, measured higherLow certainty, level 2 of 4
- Folate and Red Cell FolateOne source, found no clear differenceLow certainty, level 2 of 4
Riboflavin (vitamin B2)
- Riboflavin (vitamin B2) and HemoglobinOne source, reported mixed resultsVery low certainty, level 1 of 4
Vitamin A
- Vitamin A and Vitamin A (Retinol)Two sources, saying different things, and one source carries a noticeVery low certainty, level 1 of 4
Vitamin B12
- Vitamin B12 and HemoglobinOne source, found no clear differenceLow certainty, level 2 of 4
Vitamin D
- Vitamin D and 25-hydroxyvitamin DOne source, measured higherModerate certainty, level 3 of 4
Zinc
- Zinc and Serum zincOne source, measured higherVery low certainty, level 1 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.
Vitamin A and vitamin A (Retinol)
Two sources here, and they say different things: one measured higher vitamin A (Retinol) and one found no clear difference.
One source’s range. The sources here say different things. Systematic review, 2019 · 14 studies pooled · 6,153 participants
How much of this is one source
Read from 12 sources. 14 of the 15 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
- Bone strength10 questions · 6 ingredients
- Hormones, thyroid and fertility27 questions · 11 ingredients
- Liver, kidney and digestion22 questions · 14 ingredients
- Skin, hair and nails7 questions · 4 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.