# Sustained-Release Protein Powders Nutrabolics Brings Back Isobolic with Eight-Hour Amino Release By Adam Harrie | Written with AI assistance | Published 2026-10-28 | Lifestyle Source: Trend Hunter, https://www.trendhunter.com/trends/sustained-release-protein-powders References: [stack3d](https://www.stack3d.com/2026/10/nutrabolics-brings-back-isobolic)  Nutrabolics is bringing back 'Isobolic' with a [sustained-release formula](https://www.trendhunter.com/trends/casein-rice-meals) that delivers a steady stream of amino acids for up to eight hours. The protein powder returns as part of the brand's 25th anniversary, with a [refreshed taste and texture](https://www.trendhunter.com/trends/texture-focused-protein-powders) and a blend built from whey, milk and egg isolates. Each serving delivers 22g of protein, and two scoops raise that to 44g. Nutrabolics is also offering it in four flavors, including 'Vanilla Sundae' and 'Chocolate Fudge Sundae,' in 1.3lb and 4lb bags. The anniversary relaunch ties a legacy product to a more transparent nutrition pitch. A powder that extends protein release over a longer window gives the category a clearer recovery-and-satiety angle, while the larger bag format supports repeat and longer-term use. Image Credit: Stack3d ## Trend Insights (Trend Hunter) - Score: 6.4/10 - Popularity: 25% | Activity: 67% | Freshness: 100% - Audience gender: 50% men, 50% women - Primary generations: Gen Z, Millennial - Top markets: North America ## Categories [Trend Hunter](https://www.trendhunter.com/trends) > [Lifestyle](https://www.trendhunter.com/lifestyle) > [Food](https://www.trendhunter.com/food) ## Key Themes ### What's Driving This Trend - **Timed-release Nutrition:** Extended amino acid delivery reframes protein powders around sustained recovery, satiety and all-day performance support. - **Legacy Product Relaunches:** Anniversary-led revivals create room for heritage supplement brands to modernize familiar formulas with updated transparency, taste and functional claims. - **Multi-source Protein Blends:** Combining whey, milk and egg isolates broadens texture, digestion and release-profile possibilities in performance nutrition formats. ### Who This Affects Most - **Sports Nutrition:** Sustained-release formulations expand differentiation in a crowded protein market by linking muscle support with longer-duration benefits. - **Functional Foods:** Protein powders with clearer recovery and satiety positioning illustrate how everyday nutrition products are becoming more purpose-built and benefit-specific. - **Health and Wellness Retail:** Larger-format supplement packaging supports repeat-use behavior and subscription-style merchandising across specialty, grocery and e-commerce channels. ## Related on Trend Hunter - [Sustained-Release Protein Bars](https://www.trendhunter.com/trends/gryp-protein-bar.md) - [Nighttime Protein Supplements](https://www.trendhunter.com/trends/earth-fed-muscle-nocturnal.md) - [Multi-Source Protein Powders](https://www.trendhunter.com/trends/six-fold-protein-powder.md) - [Asian-Inspired Protein Powders](https://www.trendhunter.com/trends/plantiigood.md) - [Blended Everyday Protein Powders](https://www.trendhunter.com/trends/blended-everyday-protein-powders.md) - [Blended Dairy Protein Powders](https://www.trendhunter.com/trends/blended-dairy-protein-powders.md) - [Triple-Source Protein Powder Blends](https://www.trendhunter.com/trends/designer-whey.md) - [Multi-Source Protein Powders](https://www.trendhunter.com/trends/isolyft-protein-powder.md) - [Leucine Peptide Protein Powders](https://www.trendhunter.com/trends/leucine-peptide-protein-powders.md)