Patient suitability


Medical supervision is always advised when following a VLCD program.

Review indications.


VLCDs should never be used by normal weight subjects because it may lead to excessive loss of lean body mass.

Review contraindications.


The OPTIFAST VLCD Program Intensive level is not recommended for use by persons over the age of 65 years, pregnant, or breastfeeding women among others.

View precautions.


The use of a VLCD may influence the dosage requirements of some medications. This is important for medications that have a narrow effective therapeutic range.

Review medication impacts.

Side effects

The Intensive level of the OPTIFAST VLCD Program is accepted as being safe with only minor, transient side effects being observed.

View possible side effects.