FIRST IMPRESSIONS & TESTING

GU immediately stands out for its compact size, which is ideal when you’re limited on space — especially on longer runs where every bit of kit matters.

The packet is easy to open, and importantly, there was no leakage after use when stored back in a pocket.

The gel itself is thick and came out in two distinct “blobs”, but despite that, it went down surprisingly easily without needing water — which isn’t always the case with thicker gels.

PERFORMANCE & EXPERIENCE

This is where GU really performed.

There was a clear and noticeable energy boost after taking it, both quickly and sustained over time. Unlike some gels that feel neutral, this one actually made a difference — my performance genuinely felt stronger after taking it.

Despite being thick, it didn’t feel heavy or difficult to manage mid-session.

VERDICT

This is a gel I would use again.

It combines practicality — compact size, no mess, easy opening — with something that really matters: actual performance benefit.

While the thicker texture might not suit everyone, it works surprisingly well in practice and delivers a clear energy boost when you need it.

A compact gel that actually delivers when it counts.