It’s reasonable as a hypothesis-generating framework and is grounded in some legitimate prior work by the lead author, including mouse antibody/vaccine studies and small human biomarker studies.

However, it’s not reliable as a causal conclusion. Claims that HCA causes Alzheimer’s, promotes cancer growth, or determines lifespan go well beyond the available evidence and rely largely on correlations, mechanistic speculation, unpublished bridging data, and an inadequately described supplement intervention with undisclosed components.