Optifast Alternatives: Compare the Purpose Before the Powder

What is an Optifast alternative, really?

A genuine Optifast alternative is another supervised very low calorie diet (VLCD), not any shake that happens to look similar on the shelf. Optifast's own distributor listings describe its products as a "food for special medical purposes" intended for weight management, and state the range must sit inside a healthcare professional's care plan (retrieved 28 October 2026 via Nestlé-partner pharmacy pages such as sssaustralia.com.au and nationalpharmacies.com.au). That line puts Optifast inside the Food Standards Australia New Zealand very low energy diet (VLED) category, under Standard 2.9.5 of the Food Standards Code.

If you are searching this, the choice you actually face is between brands your doctor or dietitian would consider for the same clinical job. A different product category, like a daily protein shake or a snack sachet, is not a cheaper Optifast, it is a different thing entirely.

So before the macro panels, the question that matters is what category you are buying into, and who takes responsibility for the plan.

Who the VLCD category is for, and who it is not for

A VLCD, also called a VLED on the FSANZ page, is a clinical weight-management tool. FSANZ writes that VLEDs are special-purpose foods for people managing overweight and obesity, that they can serve as the only source of nutrition for a period of up to twelve weeks, and that they must be run with a medical practitioner and a dietitian in the loop (Food Standards Australia New Zealand, Very low energy diets, retrieved 28 October 2026). The category is defined by that supervision, not by the flavour of the sachet.

Pharmacy listings carrying Optifast VLCD state its typical audience in plain words: "intended for individuals with a BMI 30 or more, or a BMI 27 or more with obesity-related medical conditions" (retrieved 28 October 2026 via sssaustralia.com.au and bloomsthechemist.com.au). Victoria's Better Health Channel is explicit that anyone embarking on a VLED should book in with a dietitian so they continue meeting nutritional needs, keep structured follow-up, and plan a step back to ordinary eating when the program ends (Better Health Channel, Weight management services, retrieved 28 October 2026).

This information is general and is not medical advice. A VLCD is a clinician's call, and whether or not it suits your situation sits with the people who know your health history.

Which supervised VLCD alternatives are sold in Australia?

The two Australian brands your doctor or dietitian is most likely to put in front of you are Optifast (Nestlé Health Science) and OptiSlim VLCD Classic. Both publish full nutrition information panels. On the Chocolate SKUs, from each brand's own panels verified on 2 September 2026 and re-checked on OptiSlim today:

Numbers come from each brand's own published panels, pulled on 2 September 2026 for the Optifast ranges and on 28 October 2026 for OptiSlim; recipes change and new flavours appear, so verify the live pack before you buy. HLTH+ is not shown in this table because it is not a VLCD and does not fit the clinical category being compared, as the separate section further down explains.

A couple of things fall out of the panel read that are worth saying plainly. OptiSlim VLCD Classic Chocolate carries 13.7g sugars per 43g sachet, which is more than its protein; most of standard Optifast Chocolate's 12.7g sugar is lactose, while Protein Plus drops to 2.2g sugar by using artificial sweeteners instead. If a prescriber has flagged dairy or soy, both brands' allergen lines matter equally.

How do Optifast's own ranges compare?

Optifast publishes two shake ranges: the standard VLCD Shake across six flavours, and the Protein Plus Shake across three. Protein Plus is a larger 63g serve carrying 28g protein against the standard shake's 20g per 53g serve, which the brand describes as "40% more protein": the arithmetic (28 divided by 20) comes to 1.4 exactly, so the claim checks out. Dietary fibre is identical at 3.6g per serve across both.

Protein Plus is also where Optifast strips lactose. Standard Chocolate lists 11.7g lactose per sachet, Protein Plus 0.63g, roughly an eighteen-fold drop. The sugar figure tracks lactose directly: 12.7g on the standard Chocolate, 2.2g on Protein Plus. People with milk-sugar intolerance tolerate Protein Plus better for that reason, though the overall allergen declaration still names milk, soy and fish.

The two ranges also differ at the shelf. Standard shakes come in 12 or 18 packs across Chocolate, Vanilla, Coffee, Banana, Strawberry and Mocha, with Mocha and the two red-fruit flavours slightly lower in sugar at 9.5g to 10.1g. Protein Plus comes in a 10 pack across three flavours and uses artificial sweeteners that carry a phenylalanine warning. Neither range publishes a price on optifast.com.au, so retail prices sit with the pharmacy channel. For a row-by-row read on the brand's Protein Plus SKU, see Optifast Protein Plus explained.

Which works better, Optifast or OptiSlim?

Neither brand is objectively the stronger option, and it is the wrong question to put to a pharmacy shelf. Both carry out the same job, which is to replace meals inside a clinical program chosen by a prescriber. Which one your clinician recommends usually turns on tolerance (standard Optifast is lactose-dense, Protein Plus and OptiSlim use artificial sweeteners), pack size and price through the pharmacy you use, and how the person responds at the first review. The AI Overview on the current Australian results page frames it the same way: the Brisbane Obesity Clinic entry sitting on page one is titled "OPTIFAST vs Weight Loss Shakes Before Bariatric Surgery", and it warns readers not to swap products without advice.

For the brand-on-brand label read with The Lady Shake, which is a different category again (a meal replacement sold direct, not a VLCD), learn more in Optifast vs The Lady Shake. For the two VLCDs set beside each other with their own panels, learn more in Optifast vs OptiSlim.

Is Optifast being discontinued?

Optifast's own site at optifast.com.au and the VLCD product pages for the standard and Protein Plus ranges still appear in the Australian results and in distributor listings on 28 October 2026 (the brand homepage ranks first on this keyword, and Nestlé-partner retailers list every flavour across both ranges). There is no public announcement of a product-wide discontinuation that this review has turned up. The Protein Plus 10 pack and Chicken Soup pack sizes are the two most-moved SKUs on the pharmacy supply pages checked, and both were listed as available. If a particular flavour is out of stock at your pharmacy, that is usually a supply question, not a product withdrawal.

How does Optifast fit beside everyday meal replacements and protein shakes?

Three food categories keep getting put beside each other in search, and they are not the same thing under the Food Standards Code. A VLED like Optifast is a food for special medical purposes under Standard 2.9.5, meant to serve as every meal under clinician oversight. A formulated meal replacement under Standard 2.9.3 is defined by the Code as a food that stands in for one or two meals in a day without acting as the whole diet (Standard 2.9.3, Food Standards Code, retrieved 28 October 2026). A protein shake aimed at daily nutrition sits in a third category again (either an ordinary food or a Formulated Supplementary Food, Standard 2.9.3 Part 2), and is not designed to replace meals at all.

The practical shorthand: a VLCD replaces every meal, a meal replacement swaps one or two, and a daily nutrition shake sits beside the food you already eat. Pricing, protein density and clinician involvement all follow that first category decision. For the full breakdown of how the meal replacement and protein shake categories differ on the label, learn more in meal replacement shake vs protein shake. For an Australian criteria read on meal replacements as a category, learn more in meal replacement shakes.

More on everyday nutrition when calories drop → read our note on eating less and keeping nutrition in.

When you are not on a VLCD: everyday nutrition

HLTH+ is not an Optifast alternative. It is a Formulated Supplementary Food, a different FSANZ category to the VLCD shakes read above. The format is a daily sachet taken alongside your usual meals, not a replacement for them. If you are on a prescribed VLCD, the person who prescribed it is the person who adjusts it.

If you are not on a VLCD, the reader-side question changes entirely. Over 90% of Australian adults do not meet dietary guidelines (Australian Institute of Health and Welfare, Poor diet in adults), and the gap sits on protein, dietary fibre and micronutrients. HLTH+ formulas are built out by Accredited Dietitians against the Nutrient Reference Values (NRVs) published by Australia's National Health and Medical Research Council. The HLTH+ range covers life-stage formulas: Women's and Women's 50+ for women, plus Men's and Men's 50+ for men.

A single 55g Women's sachet is listed at 30g protein, 7g dietary fibre and 30 essential daily nutrients, counted across macros, functional ingredients, vitamins and minerals. Separately, the panel declares 10 billion CFU of the brand's Lactobacillus Plantarum Postbiotic, plus 5g collagen and 60mg DHA. Alongside the 30 total, HLTH+ carries a balanced multivitamin profile.

A single serve has 223 calories. On the subscription, $142.80 across 28 serves is $5.10 a day. The pack lists no added sugar, no nasties, no artificial colours, no artificial flavours and no artificial sweeteners. HLTH+ is made in Australia under Good Manufacturing Practice. The pack is dairy-free and gluten-free, at RRP $6.00 a sachet. As part of a healthy diet involving a variety of foods, 30g protein contributes to the maintenance of muscle mass.

Everyday nutrition that goes alongside your food, not in place of it. HLTH+ Women's carries 30g protein, 7g dietary fibre and 30 essential daily nutrients a sachet. See the Women's formula.

The 30-second ✦ Find My Formula quiz shows what your current routine is not giving you. HLTH+ is also available online through Amazon AU and Chemist Warehouse.

This information is general, and is not medical advice. A very low calorie program is a clinical intervention; starting, adjusting or finishing one is a conversation with the health professional running it.

Frequently Asked Questions

Which supervised VLCD is the closest alternative to Optifast on the Australian shelf?

The closest shelf-level alternative is OptiSlim VLCD Classic, the other Australian VLCD range with a full published panel. OptiSlim Classic Chocolate's 43g sachet lists 17.7g protein. The same panel also shows 0.8g dietary fibre, with sugars at 13.7g. Standard Optifast Chocolate is 20g protein and 3.6g dietary fibre per 53g (retrieved 28 October 2026). Both are supervised products.

Can I switch between Optifast and OptiSlim without seeing a doctor?

Both ranges keep a clinician in the loop. Optifast listings require medical supervision; OptiSlim's own FAQ advises a GP or pharmacist chat before anyone starts (retrieved 28 October 2026). A supervised plan is designed around one product, so a swap is a question for the clinician running it.

How much protein does an Optifast alternative need per sachet?

FSANZ sets a floor of 16.7g protein in each VLED serve, averaged across three serves daily (Food Standards Australia New Zealand, Differentiating VLED and FMR, retrieved 28 October 2026). Standard Optifast Chocolate lists 20g, Optifast Protein Plus 28g, and OptiSlim VLCD Classic 17.7g per sachet, so all three sit above the floor at a three-a-day pattern.

Is there a VLCD alternative with less sugar?

Optifast VLCD Protein Plus lists 2.2g sugars per 63g sachet in Chocolate and Vanilla, lower than standard Optifast Chocolate at 12.7g and OptiSlim VLCD Classic Chocolate at 13.7g (retrieved 28 October 2026). The lower figure uses artificial sweeteners (aspartame and acesulfame potassium) and carries a phenylalanine warning on the pack, so people with phenylketonuria need the standard range or a different product entirely.

Where does HLTH+ fit beside Optifast and OptiSlim?

HLTH+ sits in the Formulated Supplementary Food category under Standard 2.9.3, which is different from a VLCD. Its 55g Women's sachet is listed at 30g protein, 7g dietary fibre and 30 essential daily nutrients, built out by Accredited Dietitians against the Nutrient Reference Values (NRVs) published by Australia's National Health and Medical Research Council. It belongs beside everyday food, not inside a supervised VLCD program.