Sterol supplements such as Imunozen are specifically not recommended for pregnant or nursing mothers because they can interfere with hormones. Particularly for pregnancy I would only get advice from a professionally qualified dietician, GP or midwife, as the label recommends.

Personally I wouldn't bother with Imunozen at all, pregnant or not. A generic sterol supplement from Boots contains 5 times as much (1500 mg instead of 300 mg) but at a much lower cost: £10 for 60 pills. The source is the same in both: a byproduct of the pine wood pulp industry called tall oil which is also used as a cheap ingredient in soap and varnish. Sterols appear in food anyway, particularly seed based oils such as corn or soya. As with all food supplements any excess simply passes through the body and goes down the loo. Sterols can interfere with cholesterol reducing medicines such as statins so people taking them are advised to get medical advice first. The plant sterol esters that appear in these supplements can also reduce the uptake of vitamin E, so people are advised to eat more foods (not supplements) containing this.

The other ingredients are antioxidants and some unnamed fatty acids. The antioxidant theory has been comprehensively debunked. The most common antioxidants are vitamins A, C and E, beta carotene and selenium. A Cochrane review of 250,000 people in 67 trials found that vitamin C and selenium needed more research to find if they do anything, and the others can actually increase the mortality rate. If antioxidants are required, a supermarket multivitamin supplement is much cheaper. However, again these nutrients appear in food and any excess is excreted by the body.

What this means is that the only thing left is the placebo effect. However the high cost is a bit of a waste of money: you could buy a lot of good food for the same as one bottle of Imunozen. You could spend the money on something like a trip to a health spa or a day out with family. There's also nothing preventing you from buying cheaper generic supplements. Most of the active ingredients are made by the same pharmaceutical companies anyway.

Imunozen is an unregulated food supplement. Its marketing is very clever: it claims to alleviate symptoms rather than curing diseases, and other people come up with anecdotes for it. However the manufacturer's publicity has massive disclaimers to avoid the FDA or NICE asking awkward questions about things like efficacy or side effects. Once you get past all the new age waffle all you're left with is a food supplement that contains small amounts of sterols and vitamins. I daresay the disclaimer for Immuno-Care (same product, different name) says all you need to know, and not just that they can't spell:

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