Hello
I have gone through your question and understood your concern.
Ribose is an energy source that the body makes from food
There is some evidence that supplemental ribose might prevent
muscle fatigue in people with genetic disorders (like fibromyalgya) that prevent sufficient energy production by the body.
Anyway,If your daughter was my patient,i will not recommend this supplement.There are insufficient evidence that this supplement may be beneficial i for
fibromyalgia.
At the other side,this supplement can interfere with her actual
thyroid problem because it is possible the interaction between D5Ribose and levothyroxine(the treatement for low thyroid).
For this reason,my advice is to be careful because this supplement can be dangerous for your daughter.
Hope i have clarified your doubts.
If you have other questions,feel free and ask.I will be happy to help.
Best regards.