Lotus Leaf
The leaf of Nelumbo nucifera, used in Chinese medicine and sold as a slimming tea for its quercetin glycosides. Everything supporting the weight and lipid claims comes from mice, rats and cell culture; no randomized human trial has been published.
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What the science says
- Anti-obesity effects are rodent-only Limited evidence
Lotus leaf extract reduced fat accumulation in mice and altered hepatic glycogen handling in diabetic KK-Ay mice, with quercetin-3-O-glucuronide identified as the main active compound. Separate rodent studies report effects on gut microbiota and brown fat thermogenesis. None of this has been tested in humans.
- No human weight-loss trials Limited evidence
PubMed contains no randomized controlled trial of lotus leaf extract for body weight, waist circumference or blood lipids in people. Products in this category are sold on preclinical mechanism alone.
- Relevant drug-interaction potential Limited evidence
Lotus leaves were found to contain potent inhibitors of CYP2D6 in an in vitro study, an enzyme responsible for metabolizing a large share of common prescription drugs. This is an in vitro finding, but it is a reason for caution rather than reassurance.
Dosage & safety
How to take it
Interactions
With medications
- drugs cleared by CYP2D6, including many antidepressants, metoprolol and other beta-blockers
Lotus leaf alkaloids strongly inhibit CYP2D6 in laboratory work, which would raise blood levels of these drugs. Do not combine without medical advice
- codeine and tramadol
Both need CYP2D6 to become active, so blocking the enzyme reduces pain relief. Do not combine
- tamoxifen
Tamoxifen also needs CYP2D6 to form its active metabolite. Avoid lotus leaf products while on tamoxifen
With other supplements
- sedative supplements such as valerian or melatonin
Nuciferine and related alkaloids are sedative in animal work, so drowsiness may add up. Be cautious combining, especially before driving
Well-established interactions only — this is not a complete list. Always tell your doctor and pharmacist what you take.
Frequently asked questions
Does lotus leaf tea help you lose weight?
Unproven: every weight and lipid finding for lotus leaf comes from mice, rats and cell culture, and no randomized human trial has been published. Many lotus leaf slimming teas add senna, which is where any quick weight change comes from.
Does lotus leaf interact with medications?
Possibly: lotus leaf contained potent CYP2D6 inhibitors in a lab study, which could raise levels of many antidepressants and beta-blockers such as metoprolol. Do not combine it with codeine, tramadol or tamoxifen, which need CYP2D6 to work.
How much lotus leaf per day?
There is no studied human dose of lotus leaf; traditional tea uses 3–10 g of dried leaf per infusion, and extract capsules state 500 mg once or twice daily as a label dose. Take it with or after food.
Is lotus leaf safe?
Human safety data on lotus leaf are limited, and its alkaloids, including nuciferine, are sedative in animals, so be cautious combining it with valerian or melatonin. Avoid it in pregnancy and breastfeeding.
Scientific references
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