Flora vital, great source of iron

I took my 16 year son for a Health Screening Test with Debbie Watkins yesterday and one of the things that came up on his test was that he was low in iron which could attribute to his low energy at the moment. Debbie recommended Flora Vital which is similar to Floradix but is gluten and yeast free.  It looks like a great product.   It is a liquid iron food supplement and I bought it today from Boots.  It is £16.49 for 500ml but Boots are offering a buy 3 for 2 at the moment so works out at £10.66 per 500 ml.