# Supplements Comparison — question guides

> Compare vitamins, minerals and nutritional supplements by exact product and pack, using dated UK retailer offers.

This file covers /task-guides/. Use the site-wide reference at https://supplementscomparison.com/llms.txt for the broader site. Canonical website: https://supplementscomparison.com/. Documentation reviewed 2026-10-18; underlying records have their own dates. Fields to verify when supplied: barcode; formulation and strength; serving and pack size; market and offer date. Retailer descriptions and label comparisons do not establish clinical benefit, safety or treatment suitability. This is read-only discovery; robots rules and source licences still apply.

## Start here

- [Agent instructions](https://supplementscomparison.com/task-guides/agent-use.md): How to find a record, use native search, interpret missing data and cite an answer.
- [Data context](https://supplementscomparison.com/task-guides/data-context.md): Site-specific identity fields, coverage, dates and limitations.
- [Source guide](https://supplementscomparison.com/task-guides/sources.md): Claim-to-source links for published guidance.
- [Task guide](https://supplementscomparison.com/task-guides/index.md): Practical steps and links into existing site tools.

## Existing site tools

- [Start a search on supplementscomparison.com](https://supplementscomparison.com/): Existing public page; use its visible controls and source dates.
- [How we compare](https://supplementscomparison.com/how-we-compare): Existing public page; use its visible controls and source dates.
- [Buying guide](https://supplementscomparison.com/buying-guide): Existing public page; use its visible controls and source dates.
- [Your buying checklist →](https://supplementscomparison.com/choosing-guide): Existing public page; use its visible controls and source dates.

## Published question guides

- [What does daily value mean on a vitamin bottle?](https://supplementscomparison.com/task-guides/what-does-daily-value-mean-on-a-vitamin-bottle/index.md): Source-linked answer; published 2026-10-18.
- [Which nutrient is not required to be listed as a daily value?](https://supplementscomparison.com/task-guides/which-nutrient-not-required-daily-value-listing/index.md): Source-linked answer; published 2026-10-18.

## Optional

- [Machine-readable action index](https://supplementscomparison.com/task-guides/agent.json): Observed GET form, fixed navigation, document index and coverage metadata.
- [Expanded reference](https://supplementscomparison.com/task-guides/llms-full.txt): Read when the individual documents are insufficient; includes published article text.
- [Guide sitemap](https://supplementscomparison.com/task-guides/sitemap.xml): Indexable human-readable guide URLs only.