What question did this study set out to answer?

This study aims to evaluate the impact of dietary L-glutamate on the growth and intestinal morphology of 100-gram hybrid striped bass.

Limited effects of short-term dietary L-glutamate supplementation on intestinal morphology of 100 g hybrid striped bass (Morone saxatilis ♀× Morone chrysops ♂)

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Randomized trial evaluates dietary L-glutamate effects on growth and intestinal morphology in hybrid striped bass, suggesting limited improvement.

This study aims to evaluate the impact of dietary L-glutamate on the growth and intestinal morphology of 100-gram hybrid striped bass.
Purified diets containing 0%, 1%, 3%, 5%, and 8% L-glutamate were fed to 100 g hybrid striped bass for four weeks.
Growth performance was measured, and serum and mucosa samples were analyzed for amino acid concentration and histology.
The growth of fish was compared with a control group fed 60% fishmeal.
Four weeks of L-glutamate supplementation showed no significant effect on growth performance, with all groups increasing weight by approximately 16% (P > 0.05).
Serum L-glutamate concentration increased with dietary level, reaching about 15.7 nmol per mg of tissue in those fed 8% L-glutamate (P < 0.001).
No significant differences in intestinal morphology were observed among groups (P > 0.05), although a decrease in goblet cells per villus was noted in the 0% L-glutamate group (P < 0.05).

Hissen et al. (2026) studied this question.

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Randomized trial evaluates dietary L-glutamate effects on growth and intestinal morphology in hybrid striped bass, suggesting limited improvement.