revgenetics.com website review

The page has 4,640 HTML elements. Above 1,500, rendering and every interaction get slower on phones.

Your mobile performance score is 82. Pages that score under 90 lose visitors before the first paint.

About 474 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 450 ms faster on a phone.

Shopify costs a phone 234 ms of main-thread work and 921 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.

A phone's processor spends 2.6 s on main-thread work while loading, 1.3 s of it running JavaScript. Above 2 s, taps and scrolls feel sluggish.

8 third-party services load with your homepage (Shopify, Yotpo and bayengage.com and others), adding 1,017 KiB and 318 ms of main-thread time.

9 long tasks block the main thread while loading, the longest for 169 ms. During a long task the page ignores taps.

10 files are served with short cache lifetimes, so returning visitors download them again (77 KiB).

3 images could be 39 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen.

About 27 KiB of CSS is downloaded but never applied on this page.

Polyfills for old browsers add 11 KiB JavaScript that modern phones do not need.

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.

4 KiB could be saved by minifying CSS.

4 KiB could be saved by minifying JavaScript.

Real Chrome users on phones do not pass Google's Core Web Vitals on this page (28-day field data from the Chrome UX Report (opens in a new tab)). Google uses this in ranking.

The page becomes fully interactive after 9.3 s. Good is under 3.8 s.

The first text or image appears after 3.2 s on a phone. Good is under 1.8 s.

Real visitors wait 1.1 s for your server to start answering (75th percentile). Good is under 800 ms.

Visually, the page fills in at 5.5 s (Speed Index). Good is under 3.4 s.

Your largest element takes 3.2 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the text “Clinical-grade NAD+ supplements, pharmaceutical NMN 1000mg,…”. Most of its time is element render delay (2.5 s).

Over the last 25 four-week periods to 2026-11-07, real Chrome visitors' tap response (inp) went from 105 ms to 130 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Your homepage downloads 2.1 MB in 207 requests on a phone: scripts 997 KiB (79), other files 774 KiB (103) and fonts 128 KiB (2). Under 2 MB keeps phones on slow connections fast.

2 images (488 KiB) are JPEG, PNG or GIF. The same pictures as WebP or AVIF are usually much smaller at the same quality, and every current browser shows them.

By the Sustainable Web Design model, a visit to your homepage emits about 0.59 g of CO₂e: 71.2 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

4 text elements don't have enough contrast against the background to read easily, especially outdoors on a phone.

All page content should be contained by landmarks: 2 elements on the page fail this check, rated moderate by axe-core.

Headings skip levels (h2 → h6 and h2 → h4), which makes the page harder to scan with a screen reader.

The homepage links to 158 pages on revgenetics.com and 19 external pages.

Your robots.txt lets ChatGPT search (OAI-SearchBot), ChatGPT (ChatGPT-User), Claude search (Claude-SearchBot), Claude (Claude-User), Perplexity (PerplexityBot) and Perplexity (Perplexity-User) read the homepage but closes other sections to them, so answers about those pages can't cite you.

https://www.revgenetics.com/discount/RGWELCOME20 declares the homepage as its canonical URL, which tells Google it is a copy of the homepage and keeps it out of search results. A site-wide template setting usually causes this.

/ and https://www.revgenetics.com/discount/RGWELCOME20 all use the title “Advanced NAD+ & NMN Longevity Supplements | RevGenetics”, and 1 other title repeat too. Search engines can't tell which page to show for a search, so each competes with the others.

https://www.revgenetics.com/collections/spermidine-supplements and https://www.revgenetics.com/collections/spermidine use the same meta description. A description written for each page earns more clicks.

We fetched 15 pages linked from your homepage (of 90 found) and read each the way a search engine does.

3 errors were logged to the browser console while the page loaded, for example “Failed to execute 'observe' on 'MutationObserver': parameter 1 is not of type 'Node'.”.

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

No analytics or tag manager detected in the HTML, so you can't measure whether any of these fixes work.

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

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

The homepage carries about 1,383 words of visible text.

Before a visitor clicks anything, the page loads Google Ads, Google Analytics, Google Tag Manager, Meta Pixel and Microsoft Ads and 1 more (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 20 cookies, 2 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 22 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.