Immunity
Vaccines for Adults: Which Ones You Need After 18 and Why
Vaccination does not end in childhood. Which vaccines adults need — flu, tetanus, pneumococcus, shingles — and how it depends on your age and risk.
3 min read
#immunity
8 articles
Immunity
Vitamin D and Immunity: Does It Really Help Against Colds?
What the research shows about vitamin D and respiratory infections, who a supplement genuinely helps, and where the promises run ahead of the evidence.
3 min read
Immunity
Frequent Colds in Adults: When It Is Normal and When It Is Not
How many colds a year is normal, why a weak immune system is rarely the answer, which warning signs need investigation, and what genuinely reduces how often you get ill.
6 min read
Immunity
Zinc for Colds: Does It Work, Which Form and How Much
What the trials show about zinc and cold duration, which forms and doses make sense, who is at risk of deficiency, and why high doses threaten copper status and smell.
6 min read
Immunity
How to Boost Immunity: What Works by Science and What Doesn't
You can't 'boost' immunity with a pill. Here's what actually helps — sleep, movement, food, vaccines — and why immune boosters and vitamin megadoses do nothing.
10 min read
Immunity
Sleep and Immunity: How Sleep Loss Raises Infection Risk
Sleeping under 6 hours raises cold risk fourfold. We break down Prather's experiments, the sleep-vaccination link, and what to do during cold season.
9 min read
Immunity
Vitamin C and Colds: What the Research Shows
Vitamin C doesn't prevent colds in most people, but cuts their length by about 8%. We unpack the myths, doses, the absorption ceiling, and zinc.
8 min read
Supplements
Vitamin D: Doses, Blood Levels and Who Actually Needs It
How to read a 25(OH)D result, which doses work for prevention and for correcting deficiency, who should be tested, and where the overdose risk begins.
10 min read