The David bar’s breakout success is proof that, in our culture of optimization, one macronutrient is king. But can the protein craze last?

If you're overwhelmed by the countless protein bars out there, we asked dietitians to help narrow down which are the best.

Some bars, like protein powder, are loaded with added sugars, various protein amounts, and different nutrients. There’s no official definition as to what constitutes a protein bar, per the FDA.

Some protein bars are made from whole-food ingredients such as nuts, fruits, oats and seeds. Others contain so much sugar, fat and artificial additives that they can seem like glorified candy bars ...

The multibillion-dollar protein-bar industry is projected to grow to over 7 billion by 2029 — so it's no surprise there are a lot of bars on the market. But they can't all be winners.

Some protein bars are made from whole-food ingredients such as nuts, fruits, oats and seeds. Others contain so much sugar, fat and artificial additives that they can seem like glorified candy bars.

The global market for protein bars is growing quickly and expected to swell to more than $2 billion by the end of 2026, according to the financial analysis site, MarketWatch.

Fulfil does its best work with nuts, providing a decent chunk of protein in a small bar. Just stay far, far away from the hazelnut. BetFTW NFL NBA NHL MLB WNBA Newsletter. POP-CULTURE.