Check what is already in the potting mix, including added fertiliser and microbial inoculants. Repotting provides access to roots. The plant must still be a compatible host.
Keep the context.
Biological compatibility, successful colonisation and a measurable plant response are different questions. The growing conditions matter, and general research is not a promise of a particular result with MegaMyco.
References
Read the biology at its source. These references describe general science and study-specific findings.