Metamucil’s active fibre is psyllium.
So what’s the difference?
Often, it’s everything else in the product.
Some commercial fibre products contain sweeteners, flavours, colours or other ingredients alongside psyllium.
When comparing products, the useful question isn’t simply which tub costs less.
Our guide to the benefits of psyllium husk powder recommends comparing the actual grams of psyllium provided per serve and checking the complete ingredient list.
If what you want is psyllium, a plain powder provides exactly that.
For people with sensitive digestive systems in particular, there may be little reason to add flavours, sweeteners and unnecessary extras.