Questions

347 questions about supplements and goals. Each answer has its own page, with sources.

Calcium (17)Do calcium supplements cause kidney stones?Do calcium supplements prevent fractures?Do calcium supplements raise the risk of heart attacks?Does calcium help with premenstrual syndrome?Does calcium help you lose weight?Does calcium lower blood pressure?Does calcium lower the risk of pre-eclampsia?Does calcium need vitamin D to work?How much calcium can the body absorb at one time?Is calcium citrate better than calcium carbonate?Is calcium safe?Should calcium be taken with food?What happens if you do not get enough calcium?What is calcium?What is calcium used for?Which foods contain calcium?Which medicines interact with calcium?
Collagen (15)Can collagen cause kidney stones?Can you get collagen from food?Does collagen help build muscle?Does collagen help hair and nails?Does collagen help joint pain?Does collagen help your skin?Does collagen make bones stronger?How long does collagen take to work?Is collagen safe?Is collagen safe in pregnancy?Should you take collagen with vitamin C?What are the side effects of collagen?What is collagen?What is collagen used for?Which type of collagen is best?
DHA (docosahexaenoic acid) (18)Can DHA cause bleeding?Can the body make its own DHA?Does DHA help the eyes?Does DHA help with depression?Does DHA improve memory?Does DHA in pregnancy help the baby?Does DHA lower inflammation?Does DHA lower triglycerides?Does DHA raise LDL cholesterol?Does infant formula with DHA help babies develop?How much DHA is recommended in pregnancy?Is algal oil DHA as good as fish oil DHA?Is DHA safe?Is DHA safe while breastfeeding?What is DHA?What is DHA used for?What is the difference between DHA and EPA?Which foods are high in DHA?
Electrolytes (15)Are electrolyte drinks better than water?Are electrolyte supplements safe?Can you have too many electrolytes?Do electrolyte drinks improve endurance?Do electrolytes affect blood pressure?Do electrolytes help with constipation?Do electrolytes help with dehydration from diarrhea?Do electrolytes prevent muscle cramps?Do you need electrolyte drinks every day?Does dehydration affect focus, and do electrolytes help?How is an oral rehydration solution different from a sports drink?What are electrolytes?What are electrolytes used for?What are the signs of low electrolytes?Which medicines interact with electrolyte supplements?
Fiber (19)Can you take fiber with statins?Does fiber help with bloating?Does fiber help with constipation?Does fiber help you lose weight?Does fiber lower blood sugar?Does fiber lower cholesterol?How does fiber lower cholesterol?How long does fiber take to lower cholesterol?How much fiber do you need per day?Is fiber from food better than a fiber supplement?Is fiber safe?What is fiber?What is fiber used for?What is the difference between soluble and insoluble fiber?Which fiber causes the least gas?Which fiber lowers cholesterol the most?Which foods are high in fiber?Which medicines interact with fiber?Why does fiber cause gas and bloating?
Fish oil (19)Can fish oil cause atrial fibrillation?Can you take fish oil with blood thinners?Does fish oil contain mercury?Does fish oil during pregnancy lower the risk of preterm birth?Does fish oil help joint pain?Does fish oil help with depression?Does fish oil improve memory?Does fish oil lower triglycerides?Does fish oil prevent heart attacks?Does fish oil reduce inflammation?How long does fish oil take to work?How much EPA and DHA is in a fish oil capsule?Is cod liver oil the same as fish oil?Is eating fish better than taking fish oil?Is fish oil safe?Should fish oil be taken with food?What is fish oil?What is fish oil used for?Which form of fish oil is absorbed best?
Glutathione (15)Are glutathione injections safe?Can you take glutathione during pregnancy?Do glutathione levels fall with age?Does glutathione help Parkinson's disease?Does glutathione help people with cystic fibrosis?Does glutathione help the body detox?Does glutathione help the liver?Does glutathione lighten skin?Does glutathione work?Is glutathione absorbed when taken by mouth?Is glutathione safe?Is inhaled glutathione safe for people with asthma?Is liposomal glutathione better than regular glutathione?Is NAC better than glutathione?What is glutathione?
Hyaluronic acid (13)Are hyaluronic acid pills or creams better for skin?Are hyaluronic acid supplements the same as hyaluronic acid injections?Can you take hyaluronic acid when pregnant or breastfeeding?Do hyaluronic acid eye drops help dry eyes?Do hyaluronic acid injections help knee osteoarthritis?Do hyaluronic acid supplements help knee pain?Do hyaluronic acid supplements improve skin?Does hyaluronic acid work?Does the molecular weight of hyaluronic acid matter?How long does hyaluronic acid take to work?Is hyaluronic acid safe?What is hyaluronic acid?Who should avoid hyaluronic acid supplements?
Iodine (15)Can too much iodine harm the thyroid?Do you need an iodine supplement in pregnancy?Does iodine boost the immune system?Does iodine help brain development in children?Does iodine help with breast pain?Does iodine help you lose weight?Does iodine shrink a goiter or thyroid nodules?Does potassium iodide protect against radiation?Is iodine safe?What happens if you do not get enough iodine?What is iodine?What is iodine used for?Which foods contain iodine?Which form of iodine is best?Which medicines interact with iodine?
Iron (16)Do iron supplements help in pregnancy?Does iron help with hair loss?Does iron help with tiredness?Does iron improve exercise performance?Does iron improve memory and concentration?How long does it take for iron supplements to work?Is iron safe?Is taking iron every other day better than every day?Should iron be taken with vitamin C?What are the side effects of iron supplements?What are the signs of iron deficiency?What is iron?What is iron used for?Which foods contain iron?Which form of iron is best?Which medicines interact with iron?
Magnesium (16)Can magnesium help prevent migraine?Can magnesium help with anxiety, stress or low mood?Does magnesium affect blood sugar?Does magnesium help you sleep?Does magnesium lower blood pressure?Does magnesium prevent muscle cramps?Is it safe to take magnesium during pregnancy?Is magnesium safe?Is magnesium used for constipation?Are some forms of magnesium absorbed better than others?What are magnesium's main benefits?What does elemental magnesium mean on a supplement label?What is magnesium?Which foods are good sources of magnesium?Which medicines should you take apart from magnesium?Who is most likely to have low magnesium?
Omega-3 fatty acids (15)Are omega-3 supplements safe?Can flaxseed oil replace fish oil?Does DHA in pregnancy improve brain development in children?Does omega-3 help children with ADHD?Does omega-3 help dry eyes?Does omega-3 help muscles recover after exercise?Does omega-3 lower blood pressure?Does plant omega-3 (ALA) protect the heart?How much omega-3 is too much?Is algae oil as good as fish oil?What are omega-3 fatty acids?What are omega-3 fatty acids used for?What is the difference between ALA, EPA and DHA?Which foods are high in omega-3?Which is better, EPA or DHA?
Potassium (15)Can too much potassium be dangerous?Do salt substitutes with potassium lower the risk of stroke?Does potassium citrate prevent kidney stones?Does potassium help bones?Does potassium help heart rhythm?Does potassium help with muscle cramps?Does potassium lower blood pressure?Does potassium lower blood sugar?Is potassium citrate better than potassium chloride?Is potassium safe?What happens if you do not get enough potassium?What is potassium?What is potassium used for?Which foods contain potassium?Why do potassium supplements contain only 99 mg?
Prebiotics (18)Are prebiotics safe?Are prebiotics safe in pregnancy and for children?Are prebiotics the same as fiber?Can prebiotics make bloating and gas worse?Do prebiotics change your gut bacteria?Do prebiotics help with bloating and gas?Do prebiotics help with constipation?Do prebiotics help with irritable bowel syndrome?Do prebiotics help you lose weight?Do prebiotics lower blood sugar and cholesterol?Do prebiotics prevent infections?Do prebiotics reduce inflammation?How long do prebiotics take to work?Is a synbiotic better than a prebiotic alone?What are prebiotics?What are prebiotics used for?Which foods contain prebiotics?Which prebiotic has the best evidence: inulin, FOS or GOS?
Probiotics (17)Are probiotics safe, and who should avoid them?Are probiotics safe for babies?Can you take probiotics during pregnancy?Do probiotics change your gut bacteria?Do probiotics help IBS?Do probiotics help with bloating and gas?Do probiotics help with constipation?Do probiotics help with depression and anxiety?Do probiotics help you lose weight?Do probiotics prevent colds?Do probiotics prevent diarrhea from antibiotics and C. difficile?Do probiotics shorten diarrhea from an infection?Does the probiotic strain matter, and how do you choose one?Is a higher CFU count better?What are probiotics?What are probiotics used for?Which foods contain probiotics?
Vitamin B12 (15)Are vitamin B12 tablets as good as injections?Do you need more vitamin B12 in pregnancy?Does metformin lower vitamin B12?Does vitamin B12 give you more energy?Does vitamin B12 help memory?Does vitamin B12 help nerve pain in diabetes?Does vitamin B12 help with depression?Does vitamin B12 lower the risk of heart disease?How long does vitamin B12 take to work?Is methylcobalamin better than cyanocobalamin?Is vitamin B12 safe?What is vitamin B12?What is vitamin B12 used for?Which foods contain vitamin B12?Who is likely to be low in vitamin B12?
Vitamin B9 (15)Can you take folic acid with methotrexate?Does folate help with depression?Does folic acid before pregnancy prevent birth defects?Does folic acid give you more energy?Does folic acid help memory?Does folic acid lower the risk of stroke?Does folic acid raise the risk of cancer?How long does folic acid take to raise folate levels?Is methylfolate better than folic acid?Is vitamin B9 safe?What is the difference between folate and folic acid?What is vitamin B9?What is vitamin B9 used for?Which foods contain folate?Who is likely to be low in folate?
Vitamin C (15)Can vitamin C cause kidney stones?Does vitamin C help with age-related macular degeneration?Does vitamin C help your body absorb iron?Does vitamin C help your skin?Does vitamin C lower blood pressure?Does vitamin C prevent heart disease or cancer?Does vitamin C prevent or shorten colds?How much vitamin C do you need a day?Is vitamin C safe?Is vitamin C safe in pregnancy?What are the signs of vitamin C deficiency?What happens if you take too much vitamin C?What is vitamin C?What is vitamin C used for?Which form of vitamin C is best?
Vitamin D (15)Does vitamin D help with depression?Does vitamin D in pregnancy help the mother or the baby?Does vitamin D interact with any medicines?Does vitamin D prevent colds and other respiratory infections?Does vitamin D prevent fractures?Does vitamin D prevent heart disease or cancer?How do you get vitamin D from sunlight and food?Is it better to take vitamin D daily or in large doses less often?Is vitamin D safe?Is vitamin D3 better than vitamin D2?Should you take vitamin D with food?What happens if you take too much vitamin D?What is vitamin D?What is vitamin D used for?What vitamin D blood level is too low?
Vitamin E (15)Can high doses of vitamin E be harmful?Can you take vitamin E with blood thinners?Does vitamin E help fatty liver disease?Does vitamin E help the immune system?Does vitamin E help with macular degeneration?Does vitamin E help with memory and dementia?Does vitamin E oil help scars?Does vitamin E prevent heart disease?Is natural vitamin E better than synthetic?Is vitamin E safe?Should vitamin E be taken with food?What is vitamin E?What is vitamin E used for?Which foods contain vitamin E?Who is at risk of vitamin E deficiency?
Vitamin K (15)Can you take vitamin K if you take warfarin?Does vitamin K help keep bones strong?Does vitamin K lower blood sugar?Does vitamin K2 help with night-time leg cramps?Does vitamin K2 stop calcium building up in the arteries?Is vitamin K safe?Is vitamin K2 better than vitamin K1?Should vitamin K be taken with vitamin D?Should you take vitamin K with food?What is vitamin K?What is vitamin K used for?Which foods contain vitamin K?Which other medicines affect vitamin K?Who is at risk of vitamin K deficiency?Why do newborn babies get vitamin K?
Zinc (14)Can too much zinc cause copper deficiency?Do zinc lozenges help with colds?Does zinc help children with diarrhea?Does zinc help with period pain?Does zinc improve sperm quality and male fertility?Does zinc lower blood sugar?Does zinc slow macular degeneration?Is zinc safe?What are the signs of zinc deficiency?What is zinc?What is zinc used for?Which foods contain zinc?Which form of zinc is best?Which medicines interact with zinc?