People began calling their results "remarkable" and "life-changing." Over time, LifeWave conducted multiple clinical studies on X39, including double-blind trials measuring things like copper peptide levels in the blood, brain coherence via EEG scans, and improvements in sleep and recovery markers
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In the FIGHT [80] and LIVE [81] RCTs performed in patients with HF and reduced ejection fraction with and without T2DM, liraglutide treatment, compared to placebo, did not demonstrate a beneficial effect on left ventricular function, with a trend towards harm [80, 81]
Key findings: A March 2025 analytical report by supplement company Niagen Bioscience on 21 top-selling NAD supplements on Amazon revealed significant discrepancies between product claims and actual content: Only 24% met claims: Only 5 hard capsules contained NAD levels matching their labeled amounts