The claim specifies a study published in 'Alzheimer’s and Dementia' linking UPFs to over 30 adverse outcomes. While multiple web results reference a study in 'Alzheimer’s & Dementia' regarding UPFs and dementia risk, the specific detail of 'more than 30 adverse health outcomes' is not independently corroborated by the provided web search snippets or Wikipedia entries. The evidence points to the existence of the study and the general link, but not the precise number of outcomes.

The claim states that the study found no significant link between UPF consumption and memory. This specific finding is mentioned in one web search result (web_search (PDF) Consumption of ultra-processed foods and health status...)). While another web search result mentions examining memory, it does not confirm the 'no significant link' finding. Therefore, the specific negative finding is only reported once.

The claim states that the limitation noted by the team was that the data was self-reported. This specific limitation is mentioned in one web search result (web_search (Large study finds no meaningful link between meat consumption and...: While these findings are detailed, the study relied exclusively on self-reported data...)). Although other web results discuss study limitations, they do not specifically cite the 'self-reported data' limitation in the context of the UPF study.