825 articles · Page 9 of 35
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- Page 1ADHD and vitamin deficiency: links do not establish a single causethrough Daily B12 requirements: age, pregnancy and the difference from treatment
- Page 2Does B12 deficiency change stool color? Color is not a B12 testthrough Sublingual B12 versus swallowed tablets: what the route changes
- Page 3Choosing a B12 supplement starts with why it is neededthrough Biotin for nails: promising anecdotes are not a reliable growth guarantee
- Page 4Biotin supplements: vitamin B7, not an automatic hair treatmentthrough Calcium in older adults: an adequate intake and fracture prevention are different goals
- Page 5Calcium for premenstrual symptoms: a three-cycle randomized trialthrough Too much choline: the adult upper limit is a boundary, not a goal
- Page 6Choline and fatty liver: deficiency correction is not a universal treatment dosethrough Copper supplement amounts: micrograms, milligrams and total intake
- Page 7Copper and magnesium: assess two needs, not a fixed ratiothrough Folate: keep DFE and folic acid quantities distinct
- Page 8Folic acid after colorectal adenomas: no preventive benefitthrough What IU means on vitamins: 2,000 IU vitamin D equals 50 micrograms
- Page 9How do Inuit get vitamin C without fresh vegetables? A varied food systemthrough Iron supplement interactions: why one spacing rule is not enough
- Page 10Periods and iron status: replacing iron while addressing blood lossthrough Does light therapy increase vitamin D? Check whether it contains UVB
- Page 11Does Liquid I.V. contain magnesium? The product line mattersthrough Magnesium bicarbonate water: what the home recipe does and does not establish
- Page 12Magnesium for blood pressure: modest findings are not a medicine replacementthrough Low magnesium symptoms: why cramps alone do not establish deficiency
- Page 13Can magnesium delay a period? Do not assume the supplement explains itthrough How much magnesium glycinate should you take? Count elemental magnesium
- Page 14Too much magnesium glycinate: count elemental magnesium across productsthrough Can magnesium cause night sweats? Review the timing and other causes
- Page 15Magnesium oil, spray and cream: application is not proof of absorptionthrough Who needs caution with magnesium supplements? Kidney function, medicines and age matter
- Page 16How fast do magnesium supplements work? Match the clock to the purposethrough Medicines that can lower magnesium: diuretics and acid suppression have different effects
- Page 17Can metformin lower magnesium? Possible losses need a broader assessmentthrough Niacin and B12: two B vitamins with different functions and risks
- Page 18ONTRAC: nicotinamide reduced new skin cancers during treatmentthrough Low potassium: identify losses and shifts before choosing replacement
- Page 19Potassium and magnesium foods: track each mineral separatelythrough Is sciatica caused by vitamin deficiency?
- Page 20Seafood nutrients: salmon, tuna and shrimp have different strengthsthrough What is the best vitamin for stiff joints? Diagnose the cause first
- Page 21Stopping a magnesium supplement: consider why it was being usedthrough Uricase treatment is not interchangeable with an enzyme supplement
- Page 22Vanadium supplements: a small specific trial does not settle benefit or safetythrough Vitamin B12 10,000 mcg: a high amount that needs a clear purpose
- Page 23Vitamin B12 for arthritis: nerve symptoms and joint disease need different carethrough Can vitamin C cause nausea? High intake can make it worse
- Page 24Vitamin C as an antioxidant: biological activity versus health outcomesthrough Iron with or without vitamin C: an equivalence trial
- Page 25Vitamin C with kidney disease: adequacy and excess need separate reviewthrough Vitamin C in tomatoes and tomato juice: compare the actual servings
- Page 26Vitamin C versus vitamin E: shared antioxidant language, different nutrientsthrough Vitamin D and cancer: prevention, mortality and treatment are different claims
- Page 27Vitamin D chemical structure: D2, D3 and the opened ringthrough Vitamin D with flaxseed oil: fat absorption does not prove a special pairing
- Page 28Foods that provide vitamin D: natural sources, fortification and portionsthrough Is taking vitamin D at night bad for sleep? No universal clock rule
- Page 29Vitamin D is a nutrient and a hormone precursorthrough Vitamin D and B12 have different roles and different status tests
- Page 30Does vitamin D deplete vitamin A? Do not infer a balancing dosethrough Vitamin E and heart disease: antioxidant plausibility did not establish prevention
- Page 31Vitamin E and hot flashes: one symptom changed while other outcomes did notthrough Vitamin K deficiency: adult causes differ from newborn risk
- Page 32Vitamin K2 in dialysis: improved status did not slow calcificationthrough Vitamin X is not a recognized essential vitamin
- Page 33Which vitamins fade dark spots? C, A, B3, D and E comparedthrough Too much zinc: stomach symptoms, copper depletion and hidden exposure
- Page 34Zinc-finger nucleases: engineered DNA targeting is not a dietary zinc effectthrough The human egg zinc spark: fluorescent detection of zinc release
- Page 35What zinc sulfate does, and how to read its dosethrough Oral zinc for warts: an adjunct trial found no added cryotherapy benefit
How do Inuit get vitamin C without fresh vegetables? A varied food system
Traditional Inuit food systems can supply vitamin C through particular animal foods, organs and locally available plant or marine foods. There is no single Inuit diet, and sources vary by region and season. A historical East Greenland reanalysis highlights algae as well as animal foods, challenging the idea that ordinary muscle meat alone explains vitamin C intake.
Iodine: distinguish a source ingredient from its iodine content
Read kelp and iodide labels carefully, with thyroid health and medicine questions kept separate from label arithmetic.
Daily iodine: requirements rise in pregnancy and lactation
The U.S. adult iodine RDA is 150 micrograms, with higher values during pregnancy and lactation. These are total-intake references, not automatic amounts to add as kelp or iodine drops.
Iodine with magnesium: thyroid context matters more than pairing
Neither mineral automatically makes the other necessary or safe. Check iodine exposure and thyroid treatment separately from the magnesium amount.
Pregnancy iodine and child cognition: a trial with substantial follow-up loss
Supplementation did not significantly improve measured childhood cognitive outcomes in this mildly deficient population.
Iodine in mildly deficient schoolchildren: selected reasoning scores improved
The children’s baseline deficiency is central to interpreting the result.
Iodine and selenium foods: overlapping sources do not give matching amounts
Seafood and eggs can contribute both minerals, but iodine and selenium have separate food patterns and requirements. A high amount of one does not establish a high amount of the other.
Thyroid support supplements: more iodine is not always better
Iodine is needed for thyroid hormone production, but excess iodine can also disrupt thyroid function. A thyroid-support label is not evidence that additional iodine is appropriate for a particular person.
What ionic zinc means, and what zinc actually does
Ionic describes a charged chemical form. It does not establish that a product is better absorbed or provides extra health benefits.
Iron: read the elemental amount without self-diagnosing deficiency
Separate label arithmetic from diagnosis, treatment and tolerability, and keep storage and medicine questions visible.
Alternate-day iron: absorption and ferritin are different outcomes
Short isotope studies favored alternate-day absorption. A longer trial found similar ferritin at equal total doses and fewer gastrointestinal effects.
Can you take iron at night? Fit timing to the prescribed plan
Evening use may fit some regimens, but the formulation, food instructions, tolerance and other medicines matter more than a universal night-versus-morning rule.
Iron and B12 in anemia: two nutrients, different problems
Iron and vitamin B12 both contribute to healthy red-blood-cell production, but one cannot substitute for the other. Combining them is useful only when the clinical assessment supports the components.
Iron after blood donation: recovery had two timelines
A donor trial shortened recovery of hemoglobin and iron stores. Its hemoglobin endpoint was partial recovery of the donation-related decline.
Constipation with iron supplements: tolerability and treatment choices
Constipation is a recognized adverse effect of oral iron. The useful response is to review the regimen and symptoms while preserving treatment of the underlying deficiency.
Iron can darken stools, but suspected bleeding needs assessment
A dark stool during oral iron use is not automatically bleeding. Tarry stool, red blood or concerning symptoms should not be dismissed as an expected color change.
Oral iron can cause diarrhea as well as constipation
Diarrhea is a recognized possible side effect of oral iron. Constipation is also possible, so one person’s experience does not predict how everyone will tolerate the same preparation.
Iron and folic acid: different reasons for combining two nutrients
Iron and folic acid often appear together in prenatal products, but their roles and indications differ. Pregnancy guidance does not mean every tired adult needs the combination.
Taking iron with food: balancing absorption and stomach tolerance
An empty stomach can favor iron absorption, but food may improve tolerability. The best practical schedule also accounts for calcium, antacids and other medicines.
Iron formulations: absorption, tolerance and the treatment goal all matter
Ferrous and ferric preparations differ, but no ingredient name alone identifies the best treatment. The elemental amount, route, tolerability and observed response must be considered together.
Oral iron in heart failure: IRONOUT did not improve exercise capacity
A sixteen-week trial found no significant improvement in peak oxygen uptake or the main secondary measures.
Iron for infants: feeding method, age and prematurity matter
Infant iron needs change with growth and feeding. Breast milk, iron-fortified formula and complementary foods contribute differently; supplement decisions require pediatric guidance.
Iron in chronic kidney disease: the route depends on the clinical setting
KDIGO’s 2026 guidance distinguishes hemodialysis from other kidney-disease settings. Iron status, anemia, treatment response and practical tradeoffs guide oral versus intravenous therapy.
Iron supplement interactions: why one spacing rule is not enough
Iron can reduce absorption of some medicines, and acid suppression can reduce iron absorption. The exact drug instructions determine the schedule.