From Fallen London Wiki
As with most other things in this game, it is a requirement to unlock certain content and options.
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I am tempted to do this, since getting those quirks past 10 is quite a pain.
<a rel="nofollow" class="external free" href="https://fallenlondon.wiki/wiki/Transform_yourself_with_Orange-Apple_Jam_spiked_with_Muscaria_Brandy">https://fallenlondon.wiki/wiki/Transform_yourself_with_Orange-Apple_Jam_spiked_with_Muscaria_Brandy</a>