Note: If you are unsure where to start, our Cymbiotika Expert is a great tool
A 2026 UK review of the October 2025 Neurology study linking high intake to ~62% faster cognitive decline, the aspartame methanol/phenylalanine/microglia neuroinflammation and BDNF/TrkB mechanism, the 2025 University of Colorado erythritol blood-brain-barrier and stroke study, the reverse-causation trap, the WHO/IARC verdict and the UK sugar-tax reformulation angle versus Dihexas unproven HGF/c-Met synaptogenesis, and why switching to water beats a peptide Read the full review NewNutrition, Metabolic & Cognitive Neuroscience 8 July 2026 Dihexa for Keto & Low-Carb Brain Fog: Ketones, the Keto Flu, BHB & the 2026 UK Review Does keto cause brain fog or clear it
For general peptide storage guidance, see our Peptide Storage Guide
Adverse Reactions The most commonly reported adverse reactions include injection site reactions, arthralgia, pain in extremity, myalgia, and peripheral edema