--- title: "IsoWhey vs Optifast: Which is searched more in Australia?" description: "Is IsoWhey or Optifast more popular in search? Compare estimated monthly branded-search demand and Share of Search inside the Meal replacement brands set in Australia. Branded searches tell you how often people look for a brand by name or related terms. Comparing these searches across competitors helps you see how popular each brand is over time." canonical: "https://gobrandwave.com/demand/au/compare/isowhey-vs-optifast" publisher: "Brandwave" --- # IsoWhey vs Optifast: Which is searched more in Australia? Is IsoWhey or Optifast more popular in search? Compare estimated monthly branded-search demand and Share of Search inside the Meal replacement brands set in Australia. Branded searches tell you how often people look for a brand by name or related terms. Comparing these searches across competitors helps you see how popular each brand is over time. ## Key facts - **Compared**: IsoWhey and Optifast - **Competitive set**: Meal replacement brands - **Market**: Australia - **Month measured**: Sep 2026 - **IsoWhey Share of Search**: 3.9% - **Optifast Share of Search**: 24.8% ## Is IsoWhey or Optifast more popular in search? - In September 2026, Optifast had more branded searches than IsoWhey among meal replacement brands in Australia. Optifast had about 12,100 branded searches, while IsoWhey had 1,900. Optifast made up 24.8% of all meal replacement brand searches we track, and IsoWhey accounted for 3.9%. - Optifast was ahead of IsoWhey in every measured month of the 12 months ending September 2026. - Across the 12 months ending September 2026, IsoWhey’s share of searches among meal replacement brands in Australia held steady at 3.9%, and its estimated monthly branded searches moved from 2.4K to 1.9K. - Across the 12 months ending September 2026, Optifast’s share of searches among meal replacement brands in Australia moved from 23.9% to 24.8%, and its estimated monthly branded searches moved from 14.8K to 12.1K. ## Top meal replacement brands in ChatGPT and Google AI Overviews In three ChatGPT questions and two Google AI Overviews, IsoWhey and Optifast were each mentioned in two out of five: in two of the three ChatGPT answers, but not in either of the two Google AI Overviews. Optifast was listed before IsoWhey in two out of three answers that named either. Brands get a higher AI rank if they are mentioned earlier in the answers that list options. | Brand | AI rank | ChatGPT answers that named it | Google AI Overviews that named it | All answers that named it | | --- | --- | --- | --- | --- | | The Lady Shake | 1st | 3 of 3 | 0 of 2 | 3 of 5 | | The Man Shake | 2nd | 2 of 3 | 0 of 2 | 2 of 5 | | OptiSlim | 3rd | 0 of 3 | 1 of 2 | 1 of 5 | | Optifast | 4th | 2 of 3 | 0 of 2 | 2 of 5 | | IsoWhey | 5th | 2 of 3 | 0 of 2 | 2 of 5 | | Huel | 6th | 0 of 3 | 1 of 2 | 1 of 5 | ## Every AI answer about meal replacement brands - Asked ChatGPT "Which meal replacement shake should I buy in Australia?": 1. The Lady Shake, 2. IsoWhey - Asked ChatGPT "What are the best meal replacement shakes in Australia?": 1. The Man Shake, 2. The Lady Shake, 3. Optifast, 4. IsoWhey - Asked ChatGPT "What's the best meal replacement shake for weight loss?": 1. The Man Shake, 2. The Lady Shake, 3. Optifast - Searched Google, AI Overview "meal replacement shakes": 1. OptiSlim, 2. Huel - Searched Google, AI Overview "meal replacement": named none of the brands we track Brands are listed in the order each answer named them. The answers were collected in Australia on October 26, 2026. ## How did search popularity change for Australia meal replacement brands in September 2026? - In September 2026, Optifast lost share of searches among meal replacement brands in Australia, from 27.4% to 24.8%. - Estimated monthly branded searches for IsoWhey in Australia fell 20.8% over 12 measured months, from 2.4K to 1.9K in September 2026. ## Month by month | Month | IsoWhey estimated searches | IsoWhey Share of Search | IsoWhey rank | Optifast estimated searches | Optifast Share of Search | Optifast rank | | --- | --- | --- | --- | --- | --- | --- | | Oct 2025 | 2.4K | 3.9% | 6 | 14.8K | 23.9% | 2 | | Nov 2025 | 2.9K | 4.5% | 5 | 14.8K | 22.7% | 2 | | Dec 2025 | 1.9K | 4.1% | 5 | 12.1K | 25.8% | 2 | | Jan 2026 | 2.4K | 3.7% | 5 | 14.8K | 22.8% | 2 | | Feb 2026 | 1.9K | 3.9% | 6 | 12.1K | 24.5% | 2 | | Mar 2026 | 2.4K | 4.7% | 6 | 12.1K | 23.8% | 2 | | Apr 2026 | 1.9K | 4.1% | 6 | 14.8K | 31.6% | 1 | | May 2026 | 1.6K | 3.6% | 6 | 12.1K | 27.6% | 2 | | Jun 2026 | 1.6K | 3.7% | 6 | 12.1K | 27.8% | 2 | | Jul 2026 | 1.6K | 3.8% | 6 | 12.1K | 28.7% | 2 | | Aug 2026 | 1.9K | 4.3% | 6 | 12.1K | 27.4% | 2 | | Sep 2026 | 1.9K | 3.9% | 6 | 12.1K | 24.8% | 2 | ## How each brand is measured Brandwave collects information about searches that people make online using IsoWhey’s and Optifast’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading. - **IsoWhey**: Measured on the search term “isowhey”. - **Optifast**: Measured on the search term “optifast”. - [IsoWhey profile](/demand/au/brands/isowhey) - [Optifast profile](/demand/au/brands/optifast) - [All meal replacement brands in Australia](/demand/au/categories/au-meal-replacement-brands): The set both shares are measured inside, 6 brands. ## Methodology - [How is the Brand Demand Index measured?](/demand/methodology): Where the figures come from, what they compare, and how they may be reused. ## Frequently asked questions ### Is IsoWhey or Optifast more popular in search? In September 2026, Optifast had more branded searches than IsoWhey among meal replacement brands in Australia. Optifast had about 12,100 branded searches, while IsoWhey had 1,900. Optifast made up 24.8% of all meal replacement brand searches we track, and IsoWhey accounted for 3.9%. ## Cite this page Brandwave. "IsoWhey vs Optifast: Which is searched more in Australia?". https://gobrandwave.com/demand/au/compare/isowhey-vs-optifast This page is also available as HTML at https://gobrandwave.com/demand/au/compare/isowhey-vs-optifast. Brandwave publishes an index of its Markdown pages at https://gobrandwave.com/llms.txt.