complexsupplements.com website review

A phone's processor spends 5.2 s on main-thread work while loading, 2.5 s of it running JavaScript. Above 2 s, taps and scrolls feel sluggish.

8 third-party services load with your homepage (Shopify, Klaviyo and Google Tag Manager and others), adding 1.7 MB and 1.2 s of main-thread time.

Your mobile performance score is 62. Pages that score under 90 lose visitors before the first paint.

3 files block the first paint until they finish downloading. Deferring or inlining them could save about 750 ms.

24 images could be 595 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.

About 459 KiB of JavaScript is downloaded but never used on this page.

About 73 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 300 ms faster on a phone.

16 files are served with short cache lifetimes, so returning visitors download them again (276 KiB).

Shopify costs a phone 220 ms of main-thread work and 513 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.

The page has 2,513 HTML elements. Above 1,500, rendering and every interaction get slower on phones.

Klaviyo costs a phone 199 ms of main-thread work and 506 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.

9 long tasks block the main thread while loading, the longest for 202 ms. During a long task the page ignores taps.

Polyfills for old browsers add 39 KiB JavaScript that modern phones do not need.

6 KiB could be saved by minifying CSS.

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

Scripts make the browser recalculate the layout repeatedly while the page loads, which wastes processor time on phones.

The page becomes fully interactive after 19.5 s. Good is under 3.8 s.

Your largest element takes 5.8 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the image “Complex Supplements”.

Visually, the page fills in at 6.5 s (Speed Index). Good is under 3.4 s.

Scripts block taps and scrolling for 441 ms in total while the page loads. Good is under 200 ms.

1 image have no width and height attributes, so the layout jumps as each one loads.

Chrome's UX Report (opens in a new tab) has too little real-visitor traffic for this site, so the figures here are lab measurements from Google's test phone on a throttled 4G connection.

Your homepage downloads 4.9 MB in 429 requests on a phone: scripts 1.8 MB (184), images 1.5 MB (44) and other files 953 KiB (175). Under 2 MB keeps phones on slow connections fast.

2 images are downloaded at several times the size a phone draws them, for example 5ef3d4049ee1996a.webp at 2,753 px wide, shown at 246 px. Resized copies would save about 252 KiB.

3 images further down the page (64 KiB) download before anyone scrolls to them. Adding loading="lazy" lets the first screen load first.

By the Sustainable Web Design model, a visit to your homepage emits about 1.38 g of CO₂e: 165.2 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

10 elements hidden from screen readers can still receive keyboard focus.

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

Headings skip levels (h2 → h4), which makes the page harder to scan with a screen reader.

Your meta description is 234 characters; Google truncates after about 160, so the end of your pitch is cut.

Structured data found (Organization) but with 1 problem, for example “Organization: url points at a different host (https://complexsupplements.cz)”.

1 link use generic text like “click here” or “learn more”, which tells Google nothing about the page behind it.

The homepage links to 160 pages on complexsupplements.com and 3 external pages.

/collections/all-products, /collections/best, /collections/arrivals, /collections/supplements and /collections/bundles have no meta description, so Google writes the search snippet from whatever text it finds.

We fetched 15 pages linked from your homepage (of 59 found) and read each the way a search engine does.

5 errors were logged to the browser console while the page loaded, for example “Failed to load resource: the server responded with a status of 400 ()”.

2 images are displayed at the wrong aspect ratio, so they look stretched or squashed.

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

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.

complexsupplements.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.

complexsupplements.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.

The homepage carries about 289 words of visible text.

DMARC is set to p=none, so mail pretending to be complexsupplements.com is still delivered. Add a report address, check the reports, then move to quarantine.

We found no DKIM key on the selectors the big email providers use. If you send through one of them, turning on DKIM signing improves delivery.

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, Google Tag Manager, Klaviyo and Meta Pixel and 2 mores (measured from a US location before any click). No consent tool was detected. Visitors from the EU, UK and several US states must be asked first.

Opening the homepage sets 27 cookies, 3 of them by other companies (measured from a US location before any click).

No known cookie consent tool loads with the page. Some sites build their own banner, and some only show one to visitors from the EU.

Loading the homepage contacts 45 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.