#guanidinoacetic acid

2 articles

A wide, editorial-style still life photographed from slightly above on a pale oat-colored linen surface, lit by soft morning window light from the left. In the center sits a small matte ceramic bowl holding a mound of fine white powder, with a minimalist wooden scoop resting beside it. Next to the bowl is an open amber glass supplement jar with a plain cream label, and a few white capsules spill across the linen in a loose arc.

To the right, a neatly arranged cluster of analog "study" objects suggests careful measurement: a vintage stopwatch with a clean white face, a slim notebook with a sage-green cover open to a hand-drawn bar chart (blurred, no legible text), and a mechanical pencil lying across the page. A small row of six identical ceramic dishes, each holding a pinch of powder, is lined up along the top edge of the frame to hint at the six-week trial. One dish is slightly out of alignment, a subtle visual cue for ambiguity.

A shallow glass of water and a single sprig of green eucalyptus add a calm, organic note in the foreground. Soft, long shadows fall across the textured linen, and the palette stays restrained: warm cream, soft sage, muted terracotta, pale gray, and touches of amber from the glass jar. A few translucent paper cutouts in two tones (sage and blush) overlap in the upper right corner as a modern graphic accent, evoking overlapping data points without showing any numbers.

Depth of field is shallow, with the bowl and stopwatch in crisp focus and the edges gently softened. The composition leaves generous negative space on the left third for title text overlay. The overall mood is thoughtful, balanced, and quietly skeptical, in the style of a contemporary wellness and science magazine: clean, tactile, minimal, with a subtle film-like grain and natural color grading. No people, no futuristic or sci-fi elements, no readable text or logos.

GAA, 뇌 강화제? 6주 실험 결과는 복합적이다

BY DR. GYMBRO · 2026년 10월 30일

GAA는 뇌를 강화한다는 주장이 붙은 크레아틴 전구체이다. 이번에 처음으로 본격적인 인간 시험을 마쳤다. 58명의 건강한 성인을 대상으로 6주간 진행된 이중 맹검 시험에서 반응 속도가 약간 빨라졌고, 기분·스트레스 지표에서도 미세한 변화가 나타났다. 하지만 대부분의 인지 테스트에서는 차이가 없었으며, 유의미한 결과는 통계적 경향 수준에 머물렀다. 안전성은 확인됐지만, 연구 규모가 작고 탐색적이며 크레아틴만을 비교한 군이 없었다. 이번 연구가 보여주는 내용과 한계, 그리고 결론이 엇갈리는 이유를 살펴본다.

A landscape editorial photograph of a sunlit kitchen table in soft morning light. An older adult's hands, with silver hair and a cream knit sleeve just visible, rest around a ceramic mug. Beside the mug are two small matte white ceramic dishes. One holds a mound of fine white powder, and the other holds a slightly different crystalline white powder. Two wooden spoons lie next to them. A handheld hand-grip dynamometer in muted sage green sits on a linen placemat in the foreground, slightly out of focus. A small open notebook with a pencil and a pair of round tortoiseshell reading glasses sit nearby, with no legible text.

The tabletop is pale oak with a visible grain. Behind it, a window with sheer curtains lets in warm golden light, and the blurred shapes of a trailing green pothos plant and a pale terracotta vase show in the background. The color palette is warm cream, sage green, soft terracotta, and pale wood, with a touch of muted navy from a folded napkin. The mood is calm, thoughtful, and quietly scientific without any laboratory feel.

The composition follows the rule of thirds. The hands and dishes sit in the left-center, and generous negative space on the right is suitable for a title overlay. Shallow depth of field, 50mm lens look, gentle film grain, and soft shadows. Modern lifestyle-magazine and health-journal aesthetic, natural and unstaged, high-end editorial photography.

nutrition

크레아틴 전구체, 65세 이상에서 그립 힘에 크레아틴보다 우위

BY DR. GYMBRO · 2026년 10월 21일

65세 이상 성인을 대상으로 한 소규모 시험에서 크레아틴의 직접 전구체인 구아니디노아세트산(GAA)이 크레아틴 모노하이드레이트보다 그립 힘을 더 크게 향상시켰습니다. 다만 8주간 21명만이 완주했으며 운동 프로그램이 없고, 신뢰 구간이 0에 거의 근접한 수준이었습니다. GAA는 근육 성장 억제인자인 미오스타틴을 더 크게 억제했고, BIA로 측정한 근육 관련 지표도 상승했지만 수분 변화가 반영됐을 가능성이 있습니다. 안전성 측면에서 주목해야 할 점은 GAA가 메틸기를 소모하면서 혈중 호모시스테인을 높일 수 있다는 점입니다. 아래에서는 연구 결과, 해석에 한계, 그리고 왜 크레아틴 모노하이드레이트가 여전히 기본 선택인지 살펴봅니다.