{"id":3029,"date":"2026-05-23T20:31:10","date_gmt":"2026-05-24T00:31:10","guid":{"rendered":"https:\/\/haidut.me\/?p=3029"},"modified":"2026-05-23T20:31:10","modified_gmt":"2026-05-24T00:31:10","slug":"niacinamide-reverses-aerobic-glycolysis-warburg-effect","status":"publish","type":"post","link":"https:\/\/haidut.me\/?p=3029","title":{"rendered":"Niacinamide reverses aerobic glycolysis (Warburg Effect)"},"content":{"rendered":"

The Warburg effect \u2014 the conversion of glucose to lactate even in the presence of oxygen \u2014 is not just a feature of cancer cells. It is also characteristic of rapidly proliferating cells like CHO cells used in biopharmaceutical production. I have written extensively about how\u00a0niacinamide (vitamin B3, also called nicotinamide)<\/strong>\u00a0can shift metabolism away from glycolysis and toward oxidative phosphorylation (OXPHOS) by increasing NAD+ levels. Mainstream oncology, however, continues to push “cancer starvation” therapies that deprive tumors of glucose \u2014 an approach that, as I have shown repeatedly, backfires spectacularly by forcing cancer cells into a dormant, therapy-resistant state. The study below, using CHO cells, provides direct experimental evidence that\u00a0niacinamide reverses the Warburg effect<\/strong>\u00a0and forces cells to consume lactate instead of secreting it \u2014 exactly the metabolic shift that cancer cells need to become vulnerable, not resistant.<\/p>\n

As the study below demonstrates,\u00a0niacinamide (NAM) supplementation<\/strong>\u00a0in fed-batch CHO cell cultures reduced peak lactate by\u00a040%<\/strong>\u00a0and induced the lactate switch\u00a03 days earlier<\/strong>\u00a0than control conditions. The mechanism is clear: NAM is converted to NAD+ via the salvage pathway (NAMPT \u2192 NMN \u2192 NAD+), raising intracellular NAD+ levels. This shifts the NAD+\/NADH ratio to favor\u00a0lactate consumption<\/strong>\u00a0(lactate \u2192 pyruvate via LDH, generating NADH) rather than lactate production. Transcriptomic analysis confirmed\u00a0upregulation of mitochondrial ETC genes<\/strong>\u00a0(Nd1, Nd2, Nd3, Nd4, Nd4l, Nd5, Cytb, Apt6) and downregulation of glycolytic genes \u2014 a complete reversal of the Warburg effect.<\/p>\n

The human-equivalent dose (HED) for niacinamide:<\/strong>\u00a0The study used nominal bioreactor concentrations of\u00a02\u20135 mM niacinamide<\/strong>. Based on the benchmark that a\u00a03g bolus dose of niacinamide produces approximately 1 mmol\/L serum concentration in humans<\/strong>, achieving the 2\u20135 mM range would require\u00a06\u201315 grams<\/strong>. However, the study notes that growth attenuation occurred at higher concentrations (5 mM), suggesting the optimal human dose for Warburg reversal without excessive growth suppression is likely in the\u00a03\u20136 gram range<\/strong>\u00a0\u2014 ideally divided into multiple doses throughout the day to maintain elevated NAD+ without peaking too high. This is consistent with what I have said for years: niacinamide at gram-level doses is a safe, inexpensive metabolic therapy that shifts cellular energy production toward oxidative metabolism.<\/p>\n

The implications for cancer are profound. If niacinamide can force CHO cells (which share core metabolic machinery with human cells) to stop secreting lactate and start consuming it, then the same logic applies to cancer cells. Instead of starving them of glucose (which triggers dormancy and resistance), we should be reversing their Warburg metabolism<\/strong> with niacinamide, making them reliant on OXPHOS \u2014 and thus reverting them back to their normal metabolic state. The quotes below support that conclusion, as does the previous work I have posted on the forum and on my blog.<\/p>\n

https:\/\/analyticalsciencejournals.onlinelibrary.wiley.com\/doi\/10.1002\/bit.70224<\/a><\/p>\n

\n“…A key challenge still faced by the biopharmaceutical industry is the accumulation of lactate in cell culture. Lactate accumulation is a result of\u00a0aerobic glycolysis, also known as the Warburg effect<\/strong>, which is the conversion of glucose to lactate despite the presence of oxygen. The Warburg effect is characteristic of CHO cells.”<\/p>\n

“…Figure 1a demonstrates that\u00a0NAM feed supplementation significantly reduced the average peak lactate concentration<\/strong>, lowering it from an average of 4.0 g\/L in the control triplicates to 2.4 g\/L in the 2 mM and 5 mM NAM-fed cultures (p = 1.5\u00d710-4), a\u00a040% decrease<\/strong>\u00a0in peak lactate concentration. As well as decreasing peak lactate, NAM feeding\u00a0induced a shift to lactate consumption<\/strong>, with the lactate shift occurring on day 5 for both the 2 mM and 5 mM fed cultures, compared to day 8 in the control cultures.”<\/p>\n

“…This early switch to lactate consumption is attributed to the conversion of\u00a0NAM to NAD+ via the salvage pathway<\/strong>, mediated by NAMPT through NMN, leading to\u00a0increased NAD+ concentrations<\/strong>. The resulting elevated NAD+\/NADH ratio strongly favours NAD+ consumption,\u00a0converting lactate to pyruvate via LDH<\/strong>\u00a0while generating NADH.”<\/p>\n

“…Transcriptomic analysis reveals a shift from glycolytic to oxidative metabolism… DGE analysis between control and NAM-fed revealed\u00a0113 upregulated genes and 186 downregulated genes<\/strong>… A key observation is the\u00a0upregulation of multiple genes in the mitochondrial ETC<\/strong>, particularly Nd1, Nd2, Nd3, Nd4, Nd4l, Nd5, Cytb, and Apt6, which encode subunits of mitochondrial Complexes I, III, and V. This strongly suggests an\u00a0increase in OXPHOS activity<\/strong>\u00a0in NAM-fed cultures.”<\/p>\n

“…Functional gene enrichment analysis using GSEA… of the four altered pathways,\u00a0three positively enriched pathways were related to oxidative phosphorylation and mitochondrial ETC activity<\/strong>, while the negatively enriched pathway was linked to PI3K\/AKT\/mTOR signalling. These findings reinforce the\u00a0metabolic shift towards OXPHOS<\/strong>\u00a0and the suppression of growth-associated signalling pathways in NAM-fed cultures.”<\/p>\n

“…In this study, NAD+ precursor NAM was supplemented in a fed-batch CHO cell culture.\u00a0NAM supplementation reduces peak lactate by 40% and reverses the Warburg effect<\/strong>\u00a0to induce the lactate shift 3 days earlier than control conditions. Transcriptomic data reveal\u00a0NAM promotes a shift from glycolytic to oxidative metabolism<\/strong>, with an upregulation of key mitochondrial ETC genes.”<\/p>\n","protected":false},"excerpt":{"rendered":"

The Warburg effect \u2014 the conversion of glucose to lactate even in the presence of oxygen \u2014…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[2226,55,373,376,2020,67,68,374],"class_list":["post-3029","post","type-post","status-publish","format-standard","hentry","category-science","tag-aerobic","tag-cancer","tag-glycolysis","tag-lactate","tag-lactic","tag-niacinamide","tag-nicotinamide","tag-warburg","wpcat-2-id"],"_links":{"self":[{"href":"https:\/\/haidut.me\/index.php?rest_route=\/wp\/v2\/posts\/3029","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/haidut.me\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/haidut.me\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/haidut.me\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/haidut.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3029"}],"version-history":[{"count":1,"href":"https:\/\/haidut.me\/index.php?rest_route=\/wp\/v2\/posts\/3029\/revisions"}],"predecessor-version":[{"id":3030,"href":"https:\/\/haidut.me\/index.php?rest_route=\/wp\/v2\/posts\/3029\/revisions\/3030"}],"wp:attachment":[{"href":"https:\/\/haidut.me\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3029"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/haidut.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3029"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/haidut.me\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3029"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}