# Concepts

The Flash Loan Building Block enables strategies to access instantaneous and uncollateralized loans in a trustless manner. This requires leveraging segment specific concepts that have been implemented by multiple DeFi protocols as listed below:

<table data-view="cards"><thead><tr><th></th><th data-hidden></th><th data-hidden></th></tr></thead><tbody><tr><td><a href="concepts/uncollateralized-lending-and-borrowing"><strong>Uncollateralized Lending &#x26; Borrowing</strong></a></td><td></td><td></td></tr><tr><td><a href="concepts/flash-loan"><strong>Flash Loan</strong></a></td><td></td><td></td></tr></tbody></table>