Hydroxypropyl methylcellulose (HPMC) with E-number 464 consists of modified cellulose made from plant fibres. We can't digest it, which is why it acts as a fibre supplement. In nature, it is biodegradable. It is a well-researched and harmless filler, used in medicine it is called hypromellose.
Hydroxypropyl methylcellulose is added to dietary supplements as a regulator and thickener to regulate the consistency of the product.
Pharma Nord's hydroxypropyl methylcellulose is non-GMO. It is made synthetically and is guaranteed free of, for example, wheat, corn and soy as well as derivatives there of.