FAQs
Why do some supplements take weeks to work?
Many supplements work by gradually changing physiological parameters — correcting deficiencies (vitamin D tissue saturation takes 3 months), building tissue stores (creatine in muscles), modulating hormone axes (ashwagandha and cortisol), or stimulating biological processes that have slow timecourses (collagen synthesis, NGF from lion's mane). "Instant" effects are mostly stimulant-driven; true physiological change is usually slow.
Which supplement works fastest?
L-theanine and melatonin work within 30–60 minutes (acute doses). Caffeine within 30–45 minutes. Beetroot extract (nitrates) within 2–3 hours. Magnesium glycinate for sleep improvements: 1–2 weeks of consistent use. Creatine for performance: 5–7 days with loading, or 3–4 weeks maintenance dosing.
If I don't feel anything, is the supplement working?
Many evidence-backed supplements work at a biochemical level without producing noticeable subjective sensations — vitamin D correcting deficiency, omega-3 reducing inflammation markers, folate supporting methylation. Blood tests (serum 25(OH)D, ferritin, inflammatory markers) are often better indicators than subjective feeling. The absence of sensation does not mean the supplement is not working.