#cognitive decline

1 article

A wide, minimalist editorial still life on a soft, warm-gray linen surface lit by gentle diffused morning window light. At center sit two identical small amber glass supplement bottles, one slightly in front of the other, with plain matte cream labels and no readable text. In front of them, two matching shallow ceramic dishes in muted sage green hold identical small ivory capsules. The capsules are nearly indistinguishable, which quietly suggests placebo versus active. Beside the dishes, a few wheat germ grains, a small cluster of aged cheddar-toned cheese shards, and a halved ripe mushroom hint at natural spermidine food sources. They are arranged with careful negative space.

On the left, a delicate balance scale in brushed brass sits perfectly level, its two small pans empty and even, as a subtle visual metaphor for "no difference." On the right, a neat open notebook with soft blurred pencil lines and a single sprig of dried eucalyptus lies beside a pair of thin round tortoiseshell reading glasses, suggesting older adults and memory without showing any people.

The background is a softly blurred pale oat-colored wall with a long gentle shadow cast diagonally across the scene from a window. The color palette is muted and modern: warm cream, sage green, amber, soft brass, and dusty terracotta accents. Shallow depth of field keeps the bottles and scale crisp while the edges melt into a creamy blur. The mood is calm, thoughtful, and quietly skeptical, like a trendy health and science journal feature. Fine film grain, a subtle matte finish, and a balanced asymmetrical composition leave open space in the upper right for headline overlay. Photographed from a slightly elevated three-quarter angle, high-end editorial photography style.

記憶改善にスパーミジンは効果なし？100名の高齢者を対象にした12か月試験でプラセボと比較して有意差なし

BY DR. SYNAPSE · 2026年10月15日

スパーミジンはオートファジー研究や動物実験に基づき、脳を守るサプリとして注目されてきました。SmartAge 試験では、主観的認知低下を訴える 100 名の高齢者に 1 日約 0.9 mg を 12 か月間投与しましたが、主要な記憶指標にプラセボとの有意差は認められませんでした（差 -0.03、P = .47）。二次的測定でも同様に効果は見られず、炎症や語彙記憶に関する探索的な示唆はあったものの、確認はされていません。本稿では、サプリ購入を検討している方へこの結果が示す意味と、研究の限界について解説します。