7 Signs You're Low in Magnesium (One of the Most Common Deficiencies)
Muscle cramps, poor sleep, anxiety, and headaches can all be signs of low magnesium. Here's how to spot deficiency, who's most at risk, and how to fix it.
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Vitamins & Minerals
Most people are not deficient in most things — but specific vitamins and minerals are widely under-consumed, and a few supplements are genuinely worth taking. These guides separate the deficiencies that show up in real blood tests from the ones that show up in marketing copy, with research-backed dosing for each.
9 Signs You're Low in Vitamin D (and Why It's So Easy to Miss)
Fatigue, low mood, bone pain, frequent illness - these are all signs of vitamin D deficiency. Here's how to spot it and what to actually do about it.
Read article →Best B12 Supplement for Vegans in 2026 (Forms, Doses, Top Picks)
Vegans need to supplement B12 — there are no reliable plant sources. Here's the best form, the right dose, and the top products based on evidence and quality.
Read article →Best Iron Supplement That Won't Cause Constipation (2026)
Most iron supplements cause constipation and nausea. Gentler forms exist — and they work just as well. Here's what the research supports and the best products to buy.
Read article →Best Magnesium Supplement for Sleep in 2026 (Ranked and Reviewed)
Not all magnesium supplements work for sleep. We ranked the best forms and products based on research, bioavailability, and what the evidence actually supports.
Read article →Best Omega-3 Supplement in 2026 (Tested, Ranked, Reviewed)
The omega-3 supplement market is full of low-dose, rancid, or misleadingly labelled products. Here's what to look for and the best products that actually deliver EPA and DHA.
Read article →Fish Oil vs Algae Omega-3: Same Results, Different Sources — Which Should You Buy?
Fish oil and algae oil both provide EPA and DHA omega-3s. One is animal-derived, one plant-sourced. Here's how they compare on evidence, purity, sustainability, and value.
Read article →Folate vs Folic Acid: They're Not the Same — Here's Why It Matters
Folate and folic acid are both vitamin B9, but they're not identical. Here's what makes them different, which is better absorbed, and why MTHFR gene variants matter.
Read article →How Much Vitamin D Per Day? The Answer Depends on Your Blood Levels
Vitamin D dosing depends on your blood levels, sun exposure, age, and why you're supplementing. Here's what the research supports - from maintenance to correcting deficiency.
Read article →Is AG1 (Athletic Greens) Actually Worth It? An Honest Review
AG1 costs $3+ per serving. Is it worth the price? We look at the ingredients, the research, the marketing claims, and whether you can do better for less.
Read article →Magnesium Glycinate vs Citrate: Which Form Is Worth Your Money?
Magnesium glycinate and magnesium citrate are two of the most popular forms. They absorb well but have different uses. Here's how to choose the right one for your goal.
Read article →Vitamin D3 vs D2: One Raises Blood Levels Better — Here's Which to Buy
Vitamin D supplements come in two forms - D3 (cholecalciferol) and D2 (ergocalciferol). D3 raises blood levels more effectively in research. Here's the full comparison.
Read article →What Does Vitamin B12 Actually Do in Your Body?
Vitamin B12 makes red blood cells, maintains nerves, and builds DNA. It's found almost exclusively in animal foods - here's why that matters and what deficiency looks like.
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