# ToxIndex vs Manual Literature Review

> How ToxIndex compares to traditional manual literature review for toxicological risk assessment.

> Manual review still owns the scientific judgment; ToxIndex takes the searching, extraction, and model runs off your toxicologists so their hours go to interpretation.

## Side-by-side comparison
| Capability | ToxIndex | Manual Literature Review |
|---|---|---|
| Time to complete an assessment | Hours to days | Weeks to months |
| Reproducibility | Same inputs, same outputs, every time | Varies by reviewer |
| Data sources searched | Thousands, automatically | Limited by researcher time and access |
| Prediction capabilities | 100+ validated tools, plus the OECD QSAR Toolbox and open-source ToxTransformer | Separate tools required |
| Audit trail | Every query, model run, and decision recorded | Reviewer notes and reference lists |
| Regulatory alignment | Covers REACH, TSCA, cosmetics, and more | Depends on reviewer expertise |
| Analog identification | Automated structural and mechanistic similarity | Manual, limited by familiarity |
| Update handling | Flags new data and regulatory changes automatically | Periodic re-review |

Manual lit review works. Toxicologists have been doing it for decades, and the scientific judgment behind it isn't something software replaces. What ToxIndex does is handle the grunt work: searching databases, pulling data, running computational models, tracking what you searched and when. Your toxicologists spend their time on interpretation instead of data extraction.

## The volume problem

A well-characterized substance takes a trained toxicologist 2-4 weeks to assess manually. Novel chemicals with limited data can take 2-6 months once you factor in analog identification and read-across. If you're managing a portfolio of hundreds or thousands of substances, the math doesn't work. You can't manually assess each one at the depth regulators expect.

ToxIndex handles the data gathering and computational predictions in hours regardless of portfolio size. Your toxicologists review evidence and make scientific judgments instead of spending weeks in PubMed.

## Reproducibility gap

The practical problem with manual review is consistency: two toxicologists assessing the same substance will search different databases, find different studies, and sometimes reach different conclusions. The divergence comes from the process, which depends on individual search strategies and documentation habits, rather than from any lack of expertise.

ToxIndex pipelines produce the same output from the same input. The methodology is fully recorded in the audit trail. When ECHA asks you to justify your search strategy and analog selection, you've got documentation ready.

## Regulatory changes

When guidance changes, manual review means re-reviewing every affected assessment. In practice, teams defer this because they don't have the bandwidth. That creates compliance risk that just accumulates.

ToxIndex flags guidance changes and identifies which assessments are affected. You can rerun historical assessments against updated requirements and get a clear comparison showing exactly what changed.

## Where manual review still wins

Expert judgment on study quality, biological plausibility, and weight-of-evidence interpretation still needs a trained toxicologist. So do novel endpoints where computational models don't have enough training data. And regulatory negotiations will always need a human who can explain the reasoning and defend the dossier.

ToxIndex is built to make toxicologists faster, not to make them unnecessary.

## Adoption path

You don't have to switch everything at once. Most teams start with the conversational interface for ad-hoc queries. Ask a question in plain language, get an evidence-backed answer with citations. From there, you can move to automated pipelines for systematic assessments as your team gets comfortable with the platform.

Assessment results include confidence levels and applicability domain flags, so it's always clear where the computational results are solid and where an expert should take a closer look.

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Canonical page: https://toxindex.com/compare/manual-review