Caffeine before training: what does the ISSN position really say about the dose of 2 mg/kg, what did the meta-analyses of strength measure, and what thresholds did EFSA provide in its 2015 opinion.

Spermidine extends the lifespan of mice and induces autophagy in cell cultures. In humans, the largest randomized trial did not show any improvement in memory after 12 months.

Glutathione in capsules, liposomal or NAC? What has really been measured in humans: Witschi 1992, Richie 2015, Sinha 2018, Sekhar 2011. No empty promises.

Caffeine, EGCG, capsaicin, L-carnitine, and ephedrine compared with meta-analyses. We show what the numbers from studies say and where marketing diverges from the data.

Detox, green coffee, CLA, echinacea, glucosamine, and multivitamins under scrutiny. We check original studies to see which supplements are truly a waste of money.

Measured detection windows for CBD in blood and urine, cutoff thresholds used in drug tests, and what Spindle's study did not check at all.

Collagen peptides are collagen hydrolyzed to 2000-5000 Da. The table compares four forms and seven products from the store and the cost of 10 g of collagen.

Indica, sativa, or hybrid? Genomics does not confirm the division. What really determines the effect: the ratio of THC to CBD and the terpene profile. Plus a table of differences.

Discover the sweet spot of CBD dosing: why the dose-response curve is bell-shaped, how to conduct titration step by step, and when a higher dose is harmful.

Decriminalization, depenalization, and legalization of marijuana are three different legal models. A comparative table, the legal status in Poland, and examples from Europe.

Shiitake and maitake and immunity: what a study involving 52 people really showed, how AHCC performed in a study with 50 women, and how the two mushrooms differ.

PSK, PSP, and microbiota without marketing: a meta-analysis of 8009 patients, phase I study in nine women, and how the supplement differs from the product studied.