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Weight Loss Supplements

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Products

What is in weight loss?

This category covers fat burners in stimulant and stimulant free forms, L-carnitine, meal replacements, and appetite and fibre products. They approach the same problem from different angles: energy while eating less, appetite control, and convenience that makes a plan easier to stick to.

The honest starting point is that fat loss comes from eating fewer kilojoules than you use, sustained across weeks. Nothing here creates that for you. What the better products in this category genuinely do is make holding a deficit more bearable, which is a real contribution, because the deficit is not usually the hard part to understand so much as the hard part to maintain.

Why shop weight loss at Supplement Mart?

  • 298 weight loss products in stock across capsules, powders, shakes and fibre
  • 58 stores nationwide, with click and collect available
  • Free shipping Australia-wide on orders over $150, with no surcharges
  • East and west coast dispatch on orders placed before 2pm on weekdays
  • Supplement Mart Rewards, earning points on every dollar spent
  • An in-house nutritionist you can actually ask a question

How it is usually used

Start with half the stated serve on anything containing stimulants. Keep a running total of caffeine from all sources, since around 400 mg a day is the usual guideline. Avoid stacking a caffeinated fat burner with a caffeinated pre-workout. Supplements are not a substitute for medical advice. If you are pregnant or breastfeeding, take prescription medication, or are managing a health condition, check with your doctor or pharmacist before starting something new.

Compare the range

TypeUsually chosen forWhat makes it different
Fat Burners Energy and appetite support while in a deficit Built around caffeine plus green tea, carnitine and similar. The caffeine is what you feel.
Stim-Free Fat Burners Evening use and caffeine sensitivity No stimulants, so no effect on sleep and safe to run alongside your usual coffee or pre-workout.
L-Carnitine A single ingredient rather than a blend Transports fatty acids for burning. Mechanism is real, measured effect in healthy adults is modest.
Weight Loss Support Structure, fullness and convenience Meal replacements, high protein powders and fibre. The least exciting and arguably most useful part.

Frequently asked questions

What actually works for fat loss?

A sustained energy deficit, enough protein to preserve muscle, resistance training, and sleep. Those four do nearly all of the work. Supplements in this category operate around the edges of that list rather than replacing any item on it.

Do fat burners work?

They help with energy and appetite while you are eating less, mostly through caffeine. They do not create a deficit, and the non stimulant ingredients have small effects at best. Used alongside a genuine diet change they can make the process easier.

Should I use a meal replacement?

They work well for people whose eating falls apart at a predictable point in the day, because they remove a decision and control the portion. The evidence supports them for one or two meals rather than as a whole diet, and what matters is what you do when you stop using them.

How much caffeine am I actually taking?

Add it up across everything: fat burner, pre-workout, coffee, tea and energy drinks. Around 400 mg a day is the usual guideline for healthy adults, and it is easy to exceed when two separate supplements both contain it.

Is protein useful when losing weight?

It is one of the biggest levers here. Protein is the most filling macronutrient per kilojoule, and keeping it high while in a deficit helps you lose fat rather than muscle. That matters more than most products in this category.

Sources

Last reviewed: 10 October 2026