Guides

Which magnesium is best for sleep, anxiety or brain health? We compare eight forms on elemental magnesium, research quality and stomach tolerance, and explain where the evidence is thin.

Adaptogens are herbs said to help the body resist stress. Ashwagandha and rhodiola have the most human research, while most other adaptogenic herbs and mushrooms rest on thin evidence.

Alpha-GPC delivers about twice as much choline per milligram, while citicoline adds cytidine (uridine) and has more cognition research in healthy adults. Here is how to choose.

Ashwagandha is the calmer adaptogen, with better evidence for stress, anxiety and sleep. Rhodiola is the more energizing one, studied mainly for stress-related fatigue and burnout. They can be combined, but no trial has tested the pair.

Supplements are not a substitute for ADHD treatment. Here is what controlled studies show about omega-3s, minerals, L-theanine, pycnogenol, saffron, citicoline, L-tyrosine and rhodiola, and which combinations to avoid with stimulant medication.

We ranked nootropic supplements by human evidence, how their doses compare with clinical studies, testing and label transparency. Here are our picks for an all-in-one stack and for each goal.

An evidence-ranked guide to focus supplements, from caffeine plus L-theanine to citicoline, L-tyrosine, rhodiola, creatine and Panax ginseng, with honest notes on doses, study limits and the basics that matter more.

An honest, evidence-ranked look at memory supplements, including bacopa, citicoline, phosphatidylserine, B vitamins, DHA, lion’s mane, creatine and ginkgo, plus a reality check on memory-enhancing pills and when to see a doctor.

Caffeine plus L-theanine is the most studied nootropic stack. Here are the doses and ratios used in trials, what they found and how to take it safely.

NALT dissolves better than L-tyrosine, but human studies show much of it leaves the body unchanged in urine and it raises blood tyrosine poorly. For study-matched doses, plain L-tyrosine has the stronger evidence.