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#vascular aging

2 articles
Approach: human outcome. Palette: natural.

Close, low-angle shot of an older adult's bare lower leg and bare feet resting on crisp white hospital bed linen, with a soft, out-of-focus window in the background. The camera sits at mattress level and looks along the calf toward the ankle. Face is not visible. A small ultrasound probe coated in clear gel presses against the back of the knee. The operator's gloved hand enters from the frame edge. Soft overcast daylight from the window gives skin tones a warm, realistic look. Around the bed, a sprig of fresh rosemary and a few purple-green ashwagandha leaves sit on a wooden bedside tray. The leaves provide plant-green accents, along with one small electric green sensor light on a monitor. Palette: natural greens, wood browns and warm skin. Mood: quiet, careful and hopeful.
supplements

PB125:卧床期间维持动脉功能的植物性 Nrf2 混合物

BY NOVA CHEN ·

PB125 是一种由迷迭香、印度人参(ashwagandha)和黄酮类化合物 luteolin 组成的植物性 Nrf2 激活剂。近期一项小规模、双盲的人体试验在 44 名受试者中检验了其效果。24 名老年受试者每日服用 200 mg,连续两周后,上臂血流介导扩张(FMD)从 2.8% 提升至 3.8%,膝后血管 FMD 从 1.5% 提升至 2.3%。在随后五天的卧床期间,PB125 组的动脉功能和抗氧化水平保持稳定,而安慰剂组出现下降。年轻受试者虽然基线 FMD 未提升,但在肢体固定期间仍表现出对膝后 FMD 的保护。由于样本量小且仅使用替代终点,这一发现更像是积极信号,而非临床疗效的确凿证明。

**Approach:** Conceptual metaphor. **Palette:** Bold color field (teal).

A single flexible garden hose, shot from a low three-quarter angle, lies coiled against a saturated teal seamless backdrop. One half of the hose is pale and wrinkled, with a stiff, cracked rubber texture and a visible kink. The other half is supple, glossy and smoothly curved. A thin stream of water arcs from the open end, catching the light. Soft, large-source studio light comes from the upper left and casts gentle, neutral grey shadows with no blue cast. A small electric green brass fitting, with a clean metallic sheen, sits where the two halves meet. The shallow depth of field blurs the coils in the foreground. The mood is quietly doubtful but curious, as if the result is promising and still unproven. There is no text anywhere in the frame.
longevity

镁补充六个月后改善动脉僵硬——随后却未见有效果的研究

BY DR. SYNAPSE ·

在前 12 周,镁对动脉僵硬没有任何可测的影响。第 24 周时,一项包含 52 名受试者的随机试验发现,脉搏波速度比安慰剂低了 1.0 m/s,却未导致血压改变。这对关注血管老化的人来说是个抢眼的结果。然而,同一研究团队在 2022 年进行的更大规模随访试验中,检测了 164 名成人和三种镁的形态,却未发现显著效应。下面我们来回顾原始研究的发现、其局限,以及该矛盾证据应如何解读。

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