What is a possible effect of ingesting lead?

Ingesting lead can lead to various adverse health effects, and stomach discomfort is one of the possible symptoms. Lead is a toxic metal that can disrupt many bodily functions, and when ingested, it often results in gastrointestinal issues. This discomfort might manifest as pain, nausea, or even more severe digestive problems. Lead poisoning can also affect the nervous system and other organs, but the immediate effects often include digestive distress.

The other options, while positive in nature, do not accurately reflect the consequences of lead ingestion. Enhanced cognitive skills, increased energy levels, and improved memory retention are all benefits one would hope to achieve from healthy substances, not from toxic exposures like lead, which impair cognitive function rather than enhance it.