過去十年間，哈佛醫學院 David Sinclair 教授實驗室與相關合作團隊在 NAD⁺ 與 NMN 領域累積了多項關鍵研究成果。從動物模型上的代謝改善，到 NAD⁺ 與 DNA 修復機制的釐清，這些研究讓 NMN 從基礎研究的小眾分子，逐步成為健康老化研究的重要焦點。
哈佛 NMN 研究關鍵年表
Sinclair 團隊早期研究指出，補充 NMN 可在動物模型中提升 NAD⁺ 水準，並改善與年齡相關的代謝功能。此研究讓 NMN 開始受到 NAD⁺ 領域的廣泛關注。
研究發現 NAD⁺ 在 DNA 修復過程中扮演關鍵調節角色。隨年齡增長，體內 NAD⁺ 水準下降可能影響細胞修復能力；NMN 作為 NAD⁺ 前驅物，在動物實驗中可協助提升修復 DNA 損傷的能力。
哈佛與 UNSW 聯合相關研究受到全球媒體關注。報導指出 NMN 能提升 NAD⁺，並在老化與輻射所致的 DNA 損傷模型中展現修復潛力。
後續動物研究指出，NMN 可透過提升 NAD⁺ 改善老化小鼠的血管功能與運動耐力。當時的科普報導也提醒，多數成果仍屬於動物研究階段，仍需人體研究進一步驗證。
2020 年的 NMN 綜述文章整理指出，NMN 被視為重要的 NAD⁺ 前驅物，與能量代謝、細胞功能、老化研究方向密切相關，但人體應用仍需要更多臨床證據支持。
哈佛 Sinclair Lab 的研究發表清單顯示，NMN、NAD⁺、健康壽命與老化機制仍為持續研究方向之一，包含長期 NMN 動物研究與機制探討等主題。
從 NAD⁺ 看見細胞健康的關鍵
NAD⁺（菸鹼醯胺腺嘌呤二核苷酸）是細胞能量代謝、DNA 修復與健康老化研究中的重要分子。研究指出，隨年齡增長，人體內 NAD⁺ 水準會逐漸下降，進而影響細胞修復與代謝功能。
NMN（β-Nicotinamide Mononucleotide）是 NAD⁺ 的重要前驅物之一。多項研究顯示，補充 NMN 有助於提升體內 NAD⁺ 水準，支持細胞維持正常功能。這也是 NMN 成為全球健康老化與細胞修復研究熱門焦點的核心原因。
科學研究仍持續累積中
需要強調的是，目前 NMN 多數成果集中於動物模型與初期人體研究，較長期、規模較大的臨床試驗仍在進行中。對消費者而言，理性看待研究進展、關注品質與來源，會比追求單一研究的「神奇結論」更實際。
哈佛醫學院的相關研究啟發了全球對 NAD⁺ 與細胞健康的關注。iHealth NMN 以科學研究為基礎，重視原料純度、品質與穩定性，提供重視健康管理者一項更有依據的營養補充選擇。
Over the past decade, the laboratory of Professor David Sinclair at Harvard Medical School and its collaborating teams have accumulated a series of important findings in NAD⁺ and NMN research. From metabolic improvements in animal models to mechanistic insight on NAD⁺ and DNA repair, these studies helped move NMN from a niche basic-research molecule to a central focus of healthy-aging science.
Key milestones in Harvard NMN research
Early work from the Sinclair team reported that supplementing NMN could raise NAD⁺ levels in animal models and improve age-related metabolic function — a finding that drew wider attention to NMN within the NAD⁺ research field.
Research identified a key regulatory role for NAD⁺ in the DNA repair process. As NAD⁺ levels decline with age, cellular repair capacity may be affected; in animal studies, NMN — as an NAD⁺ precursor — was reported to help support DNA-damage repair.
Joint Harvard / UNSW work attracted broad media coverage that year. Reports highlighted NMN's ability to raise NAD⁺ and showed repair potential in models of age-related and radiation-induced DNA damage.
Subsequent animal work reported that, by raising NAD⁺, NMN appeared to improve vascular function and exercise endurance in aged mice. Coverage at the time also flagged that most findings remained at the animal-model stage and required further human studies for confirmation.
A 2020 NMN review summarised the literature, framing NMN as a key NAD⁺ precursor closely tied to energy metabolism, cellular function, and aging research — while noting that human applications would still need more clinical evidence.
Publications from the Sinclair Lab show that NMN, NAD⁺, healthspan, and aging mechanisms remain ongoing research themes, including long-term NMN animal studies and mechanistic investigations.
What NAD⁺ tells us about cellular health
NAD⁺ — nicotinamide adenine dinucleotide — is a critical molecule in cellular energy metabolism, DNA repair, and healthy-aging research. Studies suggest that NAD⁺ levels gradually decline with age in the human body, and that this decline can in turn affect cellular repair and metabolic function.
NMN (β-Nicotinamide Mononucleotide) is one of the principal NAD⁺ precursors. Multiple studies report that NMN supplementation can help raise NAD⁺ levels and support normal cellular function — a key reason NMN has become a global focal point in healthy-aging and cellular-repair research.
The evidence base is still growing
It's important to note that most current NMN findings come from animal models and early-phase human studies, and that longer, larger clinical trials are still in progress. For consumers, a measured view of the research, with attention to quality and sourcing, is more useful than chasing the "miracle conclusion" of any single study.
Research from Harvard Medical School has helped bring global attention to NAD⁺ and cellular health. iHealth NMN is built on a scientific foundation and prioritises ingredient purity, quality, and consistency — offering a more evidence-aware option for those who care about everyday health management.