#cerebral blood flow

2 articles

Approach: conceptual metaphor. Palette: D, bold color field.

A single AA-style cylindrical battery stands upright, fully charged, on a seamless saturated mustard-yellow backdrop. Beside it sits a matching, untouched, slightly dusty glass jar of marbles, so the charge shows no visible link to any result. More precisely, a bright tomato-red extension cord plugs into the battery's top. Its other end curls away unconnected, lying on the floor beside an unlit incandescent bulb. A small electric green LED glows on the battery's side as the only green accent. Camera: low three-quarter angle, 50mm lens, shallow depth of field, with the bulb softly blurred in the foreground. Lighting: hard, clean studio key light from the upper left, with crisp shadows falling to the right on the yellow surface. Mood: puzzled, wry, a full power source that fails to light anything.

Nikotinamid ribozid udvostručio NAD+, ali nije poboljšao pamćenje

BY NOVA CHEN · 27. lis 2026.

Suplement je udvostručio ključnu molekulu u krvi, ali pamćenje nije pomaknulo ni atoma. U 12‑tjednoj randomiziranoj studiji na starijim osobama s amnestičnim blagim kognitivnim poremećajem, nikotinamid ribozid povećao je NAD+ otprilike dva puta, no nije poboljšao kogniciju, ukupni protok krvi u mozgu niti krvni tlak. Jedna istraživačka naznaka ukazala je na mogući porast protoka krvi u hipokampusu, ali to nije dokaz. Evo što je studija zaista pokazala, koja su njezina ograničenja i što to znači ako razmišljate o kupnji NAD+ pojačivača.

**Approach: Macro science. Palette: D, bold color field (deep magenta).**

An extreme close-up photograph of a real spermidine crystalline powder deposit, pale ivory needle-like crystals fanning out in clustered rosettes, shot with a macro lens at a shallow 30-degree overhead angle. The crystals sit on a smooth, saturated magenta acrylic surface that fills the whole frame. Soft, directional studio light from the upper left creates crisp highlights along the crystal edges, translucent glints inside the needles, and short, clean shadows on the magenta. Depth of field is razor-thin, so the front cluster is sharp and the background dissolves into creamy pink bokeh. One tiny crystal tip catches a faint electric green reflection. The mood is precise, curious and quietly skeptical, like a specimen under evaluation. No text, no labels, no hands.

supplements

Studija spermidina pokazala povećanje protoka krvi u precuneusu, ali ne poboljšala memoriju

BY DR. SYNAPSE · 26. lis 2026.

Dvanaestomjesečno ispitivanje 0,9 mg/dan spermidina kod starijih osoba sa subjektivnim kognitivnim padom pokazalo je veći protok krvi u precuneusu i stabilniju mikrostrukturu bijelog materijala u odnosu na placebo. Međutim, MRI‑analiza 75 sudionika SmartAge studije nije otkrila promjene u volumenu mozga, debljini korteksa niti u hiperintenzitetima bijelog materijala. Važno je da ove promjene na snimkama nisu povezane s memorijom, a glavna studija nije pokazala nikakvu korist za pamćenje. Što ovaj signal može značiti, što ne znači i koji su praktični detalji doziranja i izvora u hrani?