You may experience physical changes in just u003ca href=u0022https://clinicaltrials.gov/ct2/show/NCT03582306u0022 target=u0022_blanku0022 rel=u0022noreferrer noopeneru0022u003e1–2 weeksu003c/au003e. This depends on what type of supplement you’re taking. Everyone will react differently to chlorophyll, so don’t be worried if there aren’t changes in 2 weeks. Chlorophyll may need more time to absorb in your system.