Yes, expired yeast is good for compost. It still has living micro-organisms that can contribute to the breakdown of carbon- and nitrogen-rich recyclables into dark-colored, fresh-smelling, nutrient-rich humus. It also may support the proliferation of beneficial bacteria already in the compost container, heap, pile or pit.
Yes, expired food can be used as compost.
Yes, yeast can go into your compost pile.
If you are using the yeast in bread, then if it is expired it may be dead and your bread will not rise. You could make a sponge of the yeast by mixing it with warm (not hot) water and wheat flour; if the sponge becomes foamy, your yeast is fine to use. If you are eating it as a dietary supplement it depends on the form. If it is in a dry form, it probably is okay if it is slightly expired. If it is in a wet form, if the yeast is dead then harmful organisms may replace it and it should probably be discarded.
If you use an expired yeast infection cream just discontinue use and get a new cream. It's unlikely to cause you any problems so no need to worry about having used the expired cream.
Compost helps plants grow.
The foods that are good for compost are usually things that can decompose in soil with worms such as banana peels. This is because the worms in your compost have to be able to decompose the things you put in the compost.
like mushrooms with acetone dipped in expired chocolate
Good quality compost has a pH of 6.8-7.3
no drug or food is good after it has expired
Sure, you can put moss in your compost.
Their really is not 'a best type of compost' it is really all the same. Any thick black compost is good for the lawn.
As of being organic material, Yes, it can be composted. Since it is rich in proteins, the actual process of breaking this down may be helped by adding yeast to it. I would add yeast to it if I had a lot of flour to compost, but not if it was only a small amount of it.