Need expert recommendations for third-party tested vegan protein powders that are completely free of heavy metals and artificial sweeteners like stevia.
Fan-out diagram
Seed → topic clusters → sub-queries, per model.
Badge and edge weight = share of passes that produced the query. Hover a query for its intent and routing format.
Query classes
Google's semantic query class for every sub-query: what kind of answer each search is after, simulated vs real.
Classes come from the query-classifier (a local Laya model). 1 of 1 calls are low-confidence (under 50%) — hover a query in the table to see its confidence. 36 queries are still being classified.
What the models actually searched
Each model answered the query with its own web search. These are the searches it ran, matched to the closest simulated query.
- Official website · truvani.com
- The 21 cleanest protein powders · withmenutrition.com
- CR Tested These Protein Powders. All Had Low Levels of Lead. · consumerreports.org
- Official website · nakednutrition.com
- Best Unflavored Vegan Protein Powder in 2026: The Cleanest, Additive-Free Bases, Compared and Ranked · healthbritannica.com
- Protein Powder v2 Category Tested Products · cleanlabelproject.org
- Nearly Half of Top-Selling Protein Powders Exceed Safety Thresholds for Heavy Metal Contamination · cleanlabelproject.org
- CleanLabelProject_ProteinStudyWhitepaper_010825 · cleanlabelproject.org
Semantic map
Every query placed by meaning (EmbeddingGemma 2, 256-d). Shaded regions are topics, nearby points are near-paraphrases, and a circle's size is how often the query came back.
Queries
| Query / type | Search | Intent | Query class | Routing format | Cluster | Freq ↓ | Weight |
|---|---|---|---|---|---|---|---|
best third party tested vegan protein powder without stevia REFORMULATION | Google ↗ AI Mode ↗ | Find top-rated plant-based protein powders that have independent safety verification and exclude stevia. | — | review_roundup | tested heavy metal free brands | 1x of 3 | |
best third party tested vegan protein powder heavy metal free REFORMULATION | Google ↗ AI Mode ↗ | Find top-rated plant-based protein powders that have undergone independent purity testing for heavy metals. | — | review_roundup | tested heavy metal free brands | 1x of 3 | |
best heavy metal free vegan protein powder brands REFORMULATION | Google ↗ AI Mode ↗ | Find top-rated plant-based protein powders that have been tested and verified to have no heavy metal contamination. | — | buyers_guide | tested heavy metal free brands | 1x of 3 | |
heavy metal free plant protein powder brands lab tested RELATED | Google ↗ AI Mode ↗ | Discover plant protein products specifically marketed and verified as low-heavy-metal. | — | buyers_guide | independent lab test results | 1x of 3 | |
vegan protein powder without stevia or artificial sweeteners REFORMULATION | Google ↗ AI Mode ↗ | Identify plant protein options sweetened naturally or unsweetened, explicitly avoiding stevia. | — | buyers_guide | stevia free plant protein | 1x of 3 | |
plant protein powders with no artificial sweeteners or stevia REFORMULATION | Google ↗ AI Mode ↗ | Identify vegan protein supplements that completely avoid stevia, monk fruit, or artificial sweeteners. | — | comparison_table | stevia free plant protein | 1x of 3 | |
organic vegan protein powder heavy metals clean label project IMPLICIT | Google ↗ AI Mode ↗ | Identify vegan protein powders certified clean by organizations like the Clean Label Project. | — | web_article | clean label and nsf testing | 1x of 3 | |
clean label project certified plant protein powders ENTITY EXPANSION | Google ↗ AI Mode ↗ | Discover specific brand names and certifications known for rigorous heavy metal and contaminant screening. | — | product_spec_sheet | clean label and nsf testing | 1x of 3 | |
clean label project certified vegan protein powder RELATED | Google ↗ AI Mode ↗ | Discover vegan protein options that carry certifications for purity and absence of contaminants like heavy metals. | — | product_spec_sheet | clean label and nsf testing | 1x of 3 | |
pea protein powder heavy metal contamination independent lab results RELATED | Google ↗ AI Mode ↗ | Access raw data or reporting on heavy metal levels in common plant protein sources. | — | dataset | independent lab test results | 1x of 3 | |
heavy metals in plant based protein powders clean label project study RELATED | Google ↗ AI Mode ↗ | Understand the scope of heavy metal contamination in vegan proteins and which brands passed or failed. | — | pdf_whitepaper | clean label and nsf testing | 1x of 3 | |
how to choose heavy metal tested protein powder IMPLICIT | Google ↗ AI Mode ↗ | Understand the criteria and lab testing methods used to verify that protein powders are free of heavy metals. | — | web_article | heavy metal safety guide | 1x of 3 | |
vegan protein powder sweetened with monk fruit only ENTITY EXPANSION | Google ↗ AI Mode ↗ | Find alternative sweeteners used in vegan protein powders when stevia and artificial options are removed. | — | comparison_table | monk fruit and unflavored options | 1x of 3 | |
garden of life vs ritual vs naked pea heavy metal testing COMPARATIVE | Google ↗ AI Mode ↗ | Compare popular clean vegan protein brands directly against each other regarding heavy metal safety. | — | comparison_table | brand heavy metal comparisons | 1x of 3 | |
unsweetened unflavored vegan protein powder options IMPLICIT | Google ↗ AI Mode ↗ | Find raw or unflavored plant proteins that naturally contain zero sweeteners of any kind. | — | review_roundup | stevia free plant protein | 1x of 3 | |
unsweetened unflavored clean plant protein powder recommendations ENTITY EXPANSION | Google ↗ AI Mode ↗ | Find completely unflavored and unsweetened vegan protein powders to avoid all unwanted sweeteners. | — | product_spec_sheet | stevia free plant protein | 1x of 3 | |
how to choose a heavy metal free protein powder IMPLICIT | Google ↗ AI Mode ↗ | Learn the criteria, label readings, and testing standards required to guarantee a pure protein supplement. | — | how_to_steps | heavy metal safety guide | 1x of 3 | |
vega vs garden of life heavy metal testing results COMPARATIVE | Google ↗ AI Mode ↗ | Compare popular vegan protein brands regarding their heavy metal safety test results. | — | comparison_table | brand heavy metal comparisons | 1x of 3 | |
garden of life vs owyn vs naked pea heavy metals testing COMPARATIVE | Google ↗ AI Mode ↗ | Compare heavy metal test results and purity standards among popular vegan protein brands. | — | comparison_table | brand heavy metal comparisons | 1x of 3 | |
unflavored unsweetened organic pea protein powder ENTITY EXPANSION | Google ↗ AI Mode ↗ | Find single-ingredient, clean protein options that inherently avoid stevia and artificial additives. | — | buyers_guide | stevia free plant protein | 1x of 3 | |
nua naturals organic hemp protein powder review ENTITY EXPANSION | Google ↗ AI Mode ↗ | Evaluate a specific clean plant protein brand known for minimal ingredients and heavy metal transparency. | — | review_roundup | monk fruit and unflavored options | 1x of 3 | |
how to choose heavy metal safe vegan protein powder dietitian advice PERSONALIZED | Google ↗ AI Mode ↗ | Get expert professional guidance from dietitians on evaluating protein powder safety and heavy metals. | — | faq_page | heavy metal safety guide | 1x of 3 | |
best tasting vegan protein powder sweetened with monk fruit RELATED | Google ↗ AI Mode ↗ | Find vegan protein powders that use alternative natural sweeteners instead of stevia. | — | review_roundup | monk fruit and unflavored options | 1x of 3 | |
truvani plant protein ingredients sweetener check ENTITY EXPANSION | Google ↗ AI Mode ↗ | Check the exact ingredient deck of Truvani vegan protein to confirm lack of stevia or artificial additives. | — | product_spec_sheet | stevia free plant protein | 1x of 3 | |
why do plant protein powders have heavy metals RELATED | Google ↗ AI Mode ↗ | Understand the root cause of heavy metals in vegan protein powders. | — | web_article | heavy metal safety guide | 1x of 3 | |
independent laboratory results for vegan protein powders safety REFORMULATION | Google ↗ AI Mode ↗ | Access raw lab analysis reports for plant protein supplements. | — | dataset | independent lab test results | 1x of 3 | |
best tasting unsweetened plant protein powder for smoothies PERSONALIZED | Google ↗ AI Mode ↗ | Find a palatable vegan protein powder without sweeteners that blends well into daily shakes. | — | buyers_guide | monk fruit and unflavored options | 1x of 3 | |
best tasting plant protein powder without artificial sweeteners or stevia REFORMULATION | Google ↗ AI Mode ↗ | Find vegan protein powders that taste good without relying on stevia or artificial sweeteners. | — | review_roundup | stevia free plant protein | 1x of 3 | |
is organic vegan protein powder safe from lead and cadmium RELATED | Google ↗ AI Mode ↗ | Learn whether organic certification protects plant proteins from naturally occurring heavy metals in soil. | — | faq_page | tested heavy metal free brands | 1x of 3 | |
why do vegan protein powders have heavy metals RELATED | Google ↗ AI Mode ↗ | Learn the source of heavy metals in plant-based proteins such as soil absorption and manufacturing. | — | faq_page | heavy metal safety guide | 1x of 3 | |
nsf certified for sport vegan protein powder list ENTITY EXPANSION | Google ↗ AI Mode ↗ | Find vegan protein powders carrying the NSF Certified for Sport seal ensuring rigorous contaminant testing. | — | buyers_guide | clean label and nsf testing | 1x of 3 | |
best clean vegan protein powder for sensitive stomach and clean ingredients PERSONALIZED | Google ↗ AI Mode ↗ | Find gentle, hypoallergenic plant proteins with minimal, tested ingredients for sensitive digestive systems. | — | web_article | clean label and nsf testing | 1x of 3 | |
independent lab tested plant protein powders list REFORMULATION | Google ↗ AI Mode ↗ | Access a curated list of plant protein supplements verified by independent third-party laboratories. | — | checklist | independent lab test results | 1x of 3 | |
natural sweeteners safe for plant protein without stevia RELATED | Google ↗ AI Mode ↗ | Identify alternative sweeteners used in vegan protein powders that are not stevia or artificial. | — | glossary/definition | stevia free plant protein | 1x of 3 | |
transparent labs vs vivolife heavy metal testing report COMPARATIVE | Google ↗ AI Mode ↗ | Examine certificate of analysis documents comparing two popular clean-label brands. | — | pdf_whitepaper | brand heavy metal comparisons | 1x of 3 | |
what protein powders do dietitians recommend for heavy metal safety RELATED | Google ↗ AI Mode ↗ | Find expert nutrition professional endorsements regarding safe protein powder brands. | — | forum/qna | heavy metal safety guide | 1x of 3 |
Passes
Does another pass still surface new queries? A flattening curve means the fan-out has stabilised.
| Model | Pass | Target | Generated | Seconds | Tokens (in / out) | Notes |
|---|---|---|---|---|---|---|
| gemini-3.5-flash-lite | 1 | 12 | 12 | — | 923 / 1,462 | |
| gemini-3.5-flash-lite | 2 | 12 | 12 | — | 923 / 1,447 | |
| gemini-3.5-flash-lite | 3 | 12 | 12 | — | 923 / 1,475 |