Most people who take chlorella pyrenoidosa at 2 to 3 grams per day notice a marked improvement in their physical abilities after 4 to 6 weeks. Some of them climb the stairs, ride their bikes, without running out of breath as easily. Others feel intellectually stimulated or simply more fit. If the results are delayed, don’t be impatient, it may take 2 to 3 months before the effects are felt.