Does it make sense to shed while taking a supplement that is supposed to help hair? Maybe cycling through?

I was taking NAC, magnesium glycinate, reishi, vitamin D and iron (as I was deficient in both). I felt my hair was exploding in new growth, but the shedding was pretty intense at the same time. Would this be expected as part of the process? I'd so appreciate hearing any experience with any of these supplements, or any supplements that really help you? I have high testosterone and androgens so if you any tips for that, thank you in advance!