Chlorella is good for you

I recommend Chlorella which does me a lot of good, especially at the digestive level.
A pharmacist told me to stop taking it for 3 weeks on the pretext that it could draw too much from our reserves and cause fatigue, which I did and since then, my constipation problems have returned +++ .
I never stopped it anymore, at a rate of 6 tablets a day, I felt much better with chlorella.
Besides, question:
Is it true that if we take chlorella discontinuously, it risks drawing on our reserves?
Can we take it without taking a dose or if we take it at what rate?
Thank you,