cerefolin.com website review

About 282 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 1.7 s faster on a phone.

Your mobile performance score is 67. Pages that score under 90 lose visitors before the first paint.

8 third-party services load with your homepage (Google Tag Manager, userway.org and Google CDN and others), adding 773 KiB and 553 ms of main-thread time.

Google Tag Manager costs a phone 439 ms of main-thread work and 486 KiB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

3 files block the first paint until they finish downloading. Deferring or inlining them could save about 300 ms.

3 images could be 80 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen. Google estimates it would make the page about 150 ms faster on a phone.

3 long tasks block the main thread while loading, the longest for 210 ms. During a long task the page ignores taps.

7 files are served with short cache lifetimes, so returning visitors download them again (21 KiB).

Polyfills for old browsers add 25 KiB JavaScript that modern phones do not need. Google estimates it would make the page about 50 ms faster on a phone.

About 12 KiB of CSS is downloaded but never applied on this page.

Critical files load one after another instead of in parallel (3 chains). Preconnecting to key origins and preloading the hero image shortens the chain.

Your largest element takes 9.8 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the image “Cerefolin Brain Wellness bottle and packaging on a white ba…”.

The page becomes fully interactive after 9.8 s. Good is under 3.8 s.

Visually, the page fills in at 4.1 s (Speed Index). Good is under 3.4 s.

Scripts block taps and scrolling for 239 ms in total while the page loads. Good is under 200 ms.

The first text or image appears after 1.9 s on a phone. Good is under 1.8 s.

Over the last 25 four-week periods to 2026-10-31, real Chrome visitors' tap response (inp) went from 103 ms to 102 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Over the last 25 four-week periods to 2026-10-31, real Chrome visitors' largest content (lcp) went from 1.9 s to 1.8 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Your homepage downloads 2.3 MB in 234 requests on a phone: other files 1.0 MB (172), scripts 864 KiB (44) and images 320 KiB (8). Under 2 MB keeps phones on slow connections fast.

By the Sustainable Web Design model, a visit to your homepage emits about 0.65 g of CO₂e: 78.2 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

Summary elements must have discernible text: 1 element on the page fails this check, rated serious by axe-core.

All page content should be contained by landmarks: 24 elements on the page fail this check, rated moderate by axe-core.

The page has no <main> landmark, so screen-reader users cannot jump straight to the content.

9 visible links have no text or label, so screen readers cannot say where they go.

No structured data (JSON-LD), so Google can't show rich results such as your logo, ratings or FAQs.

Your meta description is 167 characters; Google truncates after about 160, so the end of your pitch is cut.

4 links use generic text like “click here” or “learn more”, which tells Google nothing about the page behind them.

Open Graph is missing og:title and og:description, so shared links fall back to guesses.

No twitter:card tag. X falls back to Open Graph, which is incomplete here.

The homepage links to 36 pages on cerefolin.com and 6 external pages.

There is no Organization (or LocalBusiness) JSON-LD, so search engines and AI assistants have no machine-readable facts about who runs the site: its name, logo, profiles and contact details.

Your homepage links to /privacy-preferences, which answers with an error. Visitors hit a dead end and search engines drop it.

/policies/terms-of-service, /policies/privacy-policy, /a/faq, /policies/shipping-policy and /policies/refund-policy have no meta description, so Google writes the search snippet from whatever text it finds.

We fetched 15 pages linked from your homepage and read each the way a search engine does.

1 link from your homepage to your own site is broken, for example https://cerefolin.com/privacy-preferences (404).

HSTS is set, but max-age is 91 days; one year is the recommended minimum.

1 link go through two or more redirects, for example https://cerefolin.com/account.

No Referrer-Policy header, so full URLs can leak to the sites you link to.

No Permissions-Policy header to switch off camera, microphone and location for embedded content.

X-XSS-Protection is set to “1; mode=block”; the header is deprecated and can introduce bugs. Use 0 or remove it.

There is no /.well-known/security.txt telling researchers how to report a security problem to you.

cerefolin.com has no CAA record, so any certificate authority may issue a certificate for it. A CAA record naming your provider (for example letsencrypt.org) closes that door.

cerefolin.com's DNS answers are not signed. DNSSEC stops attackers forging them to send visitors or email elsewhere; most registrars switch it on in a click, though most sites still run without it.

Your homepage shows a street address but no LocalBusiness JSON-LD, so Google and AI assistants have to guess your address, hours and phone from the page text.

A local customer looking to call finds no phone number on the homepage. Add one, ideally as a tap-to-call link.

No phone number or email link on the homepage, so ready-to-buy visitors have one fewer way to reach you.

The homepage shows no opening hours. If customers visit or call, show when.

There is no link to Google or Apple Maps. A directions link is one tap for a phone visitor.

No guarantee or risk reducer (money-back, free trial, no credit card) is mentioned, which is often what tips a hesitant visitor.

The homepage carries about 1,228 words of visible text.

cerefolin.com has no DMARC record, so nothing tells receivers what to do with mail that fails SPF or DKIM. Gmail and Yahoo require DMARC from bulk senders.

Email authentication: SPF record 25 points, plus 15 when it ends in -all (10 for ~all); DMARC record 25, plus 25 for a reject policy (15 for quarantine); a DKIM key on a common selector 10.

Before a visitor clicks anything, the page loads Google Ads, Google Analytics and Google Tag Manager (measured from a US location before any click). A consent tool (Ketch) is installed; check it blocks these until visitors agree where the law requires it.

Opening the homepage sets 7 cookies (measured from a US location before any click).

Loading the homepage contacts 17 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.