Alas, it's prosaic quackery, not even interesting quackery.
By now, it was more or less clear what the Voynich manuscript is: a reference book of selected remedies lifted from the standard treatises of the medieval period, an instruction manual for the health and wellbeing of the more well to do women in society, which was quite possibly tailored to a single individual.
The script had hitherto proved resistant to interpretation and presented several hurdles. Medieval lettering is notoriously fickle: individual letter variations, styles and combinations are confusing at the best of times. I recognized at least two of the characters in the Voynich manuscript text as Latin ligatures, Eius and Etiam. Ligatures were developed as scriptorial short-cuts. They are composed of selected letters of a word, which together represent the whole word, not unlike like a monogram. An ampersand is just such an example. [...] Systematic study of every single character in the Lexicon identified further ligatures and abbreviations in the Voynich manuscript and set a precedent. It became obvious that each character in the Voynich manuscript represented an abbreviated word and not a letter. [...]
One other noticeable difference from the Herbarium Apuleius Platonicus is that not a single plant name or malady is to be found in the Voynich manuscript. This was problematic until I realized that not only had the folios of the manuscript been cropped (the images of flowers and roots have been severed and the tops of folios hacked) but, more importantly, the indexes that should have been there were now absent. Indexes are present in many other similar books: a system of cross-reference for illness, complaints, names of plants and page numbers. For the sake of brevity, the name of both plant and malaise were superfluous in the text so long as they could be found in the indexes matched with a page number. Recipes require an index to function in a reference book. The same recipe format is replicated throughout the manuscript: recipes for bathing solutions, tonics, tinctures, ointments, unguents, purgatives and fragrant fumigations -- and not a name in sight. Not only is the manuscript incomplete, but its folios are in the wrong order -- and all for the want of an index.
Update: Ok, apparently that's likely bullshit. Though probably the real answer is prosaic and boring anyway.