health
Androgen Level Decrease
Adverse effectAndrogen Level Decrease refers to a reduction in androgen levels. It is classified as an adverse health effect rather than a desired outcome.
See how this named health effect fits into the broader Saw Palmetto topic.
These are research findings, not promises. Most options have little evidence, and results differ from person to person.
What can cause it
How likely each one is to cause it, most likely first.
FastingpracticeUnclear
Based on one study. Strongest study: a systematic review of studies.
A 2026 systematic review reported that some intermittent fasting protocols reduced testosterone in lean, physically active young males, without affecting muscle mass or strength.
Open the Fasting page
The expert view shows every study, dose protocol and source.
What can cause it
Interventions reported to bring this on1 listedHighest probability
- →PracticesFastingCertaintyLowSourceClinical1 other source
A 2026 systematic review reported that some intermittent fasting protocols reduced testosterone in lean, physically active young males, without affecting muscle mass or strength.
Who was studied
- People with a condition
Open FastingStudy result
in lean, physically active young males, some IF protocols reduced testosterone levels, though this did not affect muscle mass or strength
How to read the evidence
Evidence tier — overall strength of the evidence for the whole compound
- StrongWell established — backed by strong, consistent human research.
- ModerateSome genuine support, but mostly from small or lower-quality studies. Promising, not proven.
- PreliminaryEarly-stage evidence — a promising hypothesis, not an established effect yet.
- LimitedVery limited evidence — treat this as a hypothesis, not proof.
- InsufficientNot enough good evidence to draw conclusions yet.
Certainty — how sure we can be that the effect is real
- Very highVery sure — strong, consistent evidence
- HighFairly sure — consistent evidence from good studies
- MediumModerately sure — new studies could change this
- LowNot sure — little or mixed evidence
- Very lowVery unsure — almost no usable evidence
Source — where the data comes from
- Meta-analysisPooled analysis of many trials — the strongest evidence
- RCTRandomized controlled trial — a strong human study design
- ClinicalA human clinical study
- Reference knowledgeFrom general health-science or pharmacology references, not a study of this exact claim
- Animal researchStudied in animals, not humans
- Community reportsAggregated user reports — anecdotal signal, not evidence
- TheoreticalMechanism-based reasoning, not yet tested
Study grade — quality of each underlying study (A best, D weakest)
- AHigh-quality — strong, consistent human trials
- BGood — solid evidence with some limitations
- CModerate — limited, small, or mixed-quality studies
- DWeak — preliminary, indirect, or animal-only
Confidence — how strongly the sources back a finding
A 0–100 score from study quality and agreement
Most supplement evidence is graded C–D. Read it as preliminary signal, not proof.
Full write-up
What is it
Androgen Level Decrease refers to a reduction in androgen levels. It is classified as an adverse health effect rather than a desired outcome. Saw Palmetto is the listed intervention associated with this effect, but the available description does not establish it as a confirmed, general effect.
How interventions help
Saw Palmetto is associated with this outcome through a report based on discussions in YouTube videos. The finding was that androgen level decrease was mentioned in 2 of 65 videos discussing Saw Palmetto.
This does not describe a measured change in androgen levels, a defined dose, a treatment duration, or how quickly any change might occur. It also does not establish whether the effect is sustained after stopping. The available description therefore supports only that this outcome was mentioned in some discussions, not how Saw Palmetto would produce it or whether it can reliably lower androgen levels.
Choosing guidance
Saw Palmetto is not supported here by a clearly defined human study population or a clinical study design. The available mention comes from discussion videos, so it should not be treated as evidence that this effect occurs reliably in people.
No dose, duration of use, or time to appearance is provided for this effect. That means there is no grounded basis for choosing Saw Palmetto according to how much would be taken, how long it would be used, or how quickly an effect might occur.
Because the health status of the people to whom this finding might apply is not specified, its relevance to any particular person is uncertain. With only one option listed, there is also no evidence-based comparison between alternatives; this entry is best viewed as an unconfirmed possibility rather than a basis for selecting a supplement.