Low GI, low FODMAP, carb only supplement suggestions?

Hi Everyone

Can anyone suggest a low GI, low FODMAP, carb only supplement please?

I only use Huel Black due to G6PD deficiency/faba bean protein in Powder, but need to get my carbs up.

Cheers!

you could try chucking a scoop of something like this in? not sure how it would taste but plenty of flavour options.