Supplements
Best Time to Take Magnesium: Morning or Night, Food and Medicines
When to take magnesium: morning vs evening, with or without food, splitting doses, and the gaps to leave around antibiotics, bone drugs and other medicines.
Reference
Supplement Guides
These guides answer the questions people tend to ask before they buy a supplement: which form to choose, how much to take, when to take it, and what the research actually shows. Each one draws on primary sources, including NIH Office of Dietary Supplements fact sheets, MedlinePlus, systematic reviews and clinical trials, and lists them at the end of the page. Where the evidence is thin or funded by the people selling the product, we say so. Every guide also has a section on who should be careful, because medicines, pregnancy and kidney health change the picture. Use the nutrient RDA lookup to check recommended amounts for your age and life stage, and talk with a clinician or pharmacist before starting anything new.
Supplements
Best Time to Take Vitamin D: With Food, D2 vs D3 and the Upper Limit
When to take vitamin D: with a meal that contains fat, morning or night, D2 vs D3, whether you need a blood test, and the 4,000 IU daily upper limit for adults.
Supplements
CLA Supplements: Body Fat Evidence, Doses Studied and Side Effects
What conjugated linoleic acid is, what trials found for body fat, the doses studied, side effects such as stomach upset, and who should be careful with it.
Supplements
Collagen Gummies vs Powder: Dose, Sugar and What the Evidence Shows
Collagen gummies vs powder compared on grams per serving, sugar and cost per gram, plus what independent and industry-funded trials found for skin and joints.
Supplements
Creatine for Beginners: Monohydrate, Loading vs 3-5 g a Day, Myths
Creatine for beginners: why monohydrate, loading vs a steady 3 to 5 g a day, water weight, who it has been studied in, myths and who should be careful.
Supplements
Do Detox Cleanses Work? An Honest Look at the Evidence
What your liver and kidneys already do, what detox and cleanse products contain, what research reviews found, the real risks, and better uses of your effort.
Supplements
How Much Magnesium per Day: RDA, Upper Limit and Food Sources
Magnesium RDA by age and sex, the 350 mg upper limit for supplements, the best food sources, and the signs of low or excess intake, with official figures.
Supplements
Magnesium Glycinate vs Citrate: Absorption, Bowel Effects and Uses
Magnesium glycinate vs citrate compared on absorption, bowel effects, label strength and research uses, with the evidence behind each and who should be careful.
Supplements
Psyllium Husk Benefits: Dose, Water, Timing and Who Should Be Careful
What psyllium husk does for constipation, IBS, cholesterol and blood sugar, the doses trials used, how much water to drink, and how to time it around medicines.
Supplements
Types of Magnesium: Seven Forms Compared in One Table
Glycinate, citrate, oxide, malate, threonate, taurate and chloride compared on absorption evidence, bowel effects, label strength and what each is studied for.
Looking for a daily amount? The nutrient amount lookup covers recommended amounts and upper limits by age and life stage.