Weight Management Formulas Explained: What's Inside?

Maybe you've seen "fat burner" on a label and wondered what's actually in the tub. Maybe you train regularly and want something to support your energy and focus while you're eating less. Or maybe you don't train much yet, you're making changes to how you eat, and you want to know whether a formula is worth adding. This guide is for all of you.

We'll go through the main ingredients one by one, what the research has found for each, how to use them safely, and how to pick the one that suits you.

What a weight management formula can and can't do

A good formula supports the things that make a fat loss plan easier to keep doing: energy for training, focus on long days, a little extra energy use and, for some ingredients, feeling fuller. What it can't do is create the calorie gap for you. The research on individual ingredients mostly shows modest extra results alongside diet and exercise, typically in the range of 1 to 2 kg over several weeks to months. [3] [5] [6]

Think of it as the extra few percent on top of the basics. If you haven't got those basics sorted yet, start with our fat loss fundamentals guide, then come back.

The ingredients and what they've been studied for

Most formulas mix a handful of the same ingredients. Caffeine is the backbone of most of them and one of the best-researched supplements there is; the others play supporting roles, and most of the trials behind them are small and short. The cards below show the dose researchers used and what each has been studied for.

What each ingredient is there to support

Ingredient cards

• Caffeine

  3 to 6 mg per kg of body weight

  • Supports exercise performance (strength, endurance, sprinting) in trained and untrained people, plus attention and alertness [4].
  • Across 13 trials with 606 people, supported reductions in body weight, BMI and fat mass, with bigger effects at higher intakes [2].

• Green coffee bean extract

  At least 500 mg of chlorogenic acid a day

  • About 1.3 kg more weight loss than placebo in a review of three small, short trials. Unroasted beans keep more chlorogenic acids [5].

• Green tea catechins with caffeine

  In many formulas on the market

  • About 1.3 kg more weight loss and better weight maintenance afterwards, across 11 studies [6].

• Acetyl L-carnitine

  Around 2,000 mg a day gave the biggest effect

  • Across 37 trials with 2,292 people, L-carnitine supported about 1.2 kg more weight loss and about 2 kg more fat loss than placebo, clearest in adults carrying extra weight [3].
  • Helps move fats into mitochondria for energy. Most trials used L-carnitine, a closely related form.

• L-tyrosine

  Used to make dopamine and noradrenaline

  • Supports cognitive performance during short-term stress or mentally demanding tasks [7].

• Grains of paradise

  West African spice, ginger family

  • 250 mg twice a day for 12 weeks in 70 adults carrying extra weight supported higher energy expenditure, less visceral fat (the deeper fat around your organs) and more weight loss than placebo [8].
  • 30 mg a day for four weeks in young women supported higher whole-body energy use and less visceral fat [9].

• Bitter orange (p-synephrine)

  2 to 3 mg per kg

  • Supported a higher rate of fat burning during low to moderate intensity exercise without changing heart rate [10].
  • A review of around 30 human studies found no stimulant or heart effects at commonly used doses [11].

• OEA (oleoylethanolamide)

  125 mg twice a day; caffeine-free

  • Made naturally in your gut from fats, involved in fullness signalling.
  • For 60 days in 60 adults with obesity it supported less hunger, fewer sweet cravings, stronger fullness and reductions in weight, waist and body fat percentage [12].
  • A 2025 review of 10 trials found improvements in body weight, waist measurement and fat mass [13].

• Cyanotis vaga

  Plant source of ecdysteroids such as ecdysterone

  • Ecdysterone is also found in spinach, asparagus and quinoa.
  • In a 10-week trial with 46 young men, ecdysterone takers gained significantly more muscle and bench press strength; human research is still small [14] [15].

• Chromium

  Review of nine trials

  • About 1.1 kg more weight loss than placebo [1].

• Raspberry ketone

  Found in raspberries

  • So far studied only in combination with other ingredients [1].

Combining stimulants can add to side effects, which is one more reason to stick to the label dose. [1] If you compete in a drug-tested sport, note that ecdysterone (from Cyanotis vaga) isn't prohibited but is on the World Anti-Doping Agency's 2026 monitoring programme. [16] Check with your sport's anti-doping body before using any product that contains it, and see our guide to drug-tested supplements.

You'll also see black pepper extract (piperine), included to support absorption of other ingredients, and alpha GPC and ashwagandha, added for focus and for supporting your response to everyday stress. Read more in our ashwagandha guide.

Caffeine and stimulant cautions

Caffeine-based formulas are safe for most healthy adults when used as directed. A few simple rules keep it that way.

Count your total caffeine

Most adults can have up to 400 mg of caffeine a day without problems. [17]

Figures from Health New Zealand. [17] Add your formula's caffeine (1510 has 250 mg per serve) to everything else you drink. If you're also using a pre-workout, have one or the other on a given day, not both.

Protect your sleep

Caffeine cuts total sleep by about 45 minutes on average. Researchers suggest having a standard pre-workout-sized dose (about 217 mg) at least 13 hours before bed. [18] Take caffeine-based formulas in the morning or early afternoon. Poor sleep makes fat loss harder, so this matters for results as well as comfort.

Start low

Try a half serve for the first few days to see how you respond. People vary a lot in how they handle caffeine, partly because of their genes. [4] Signs you've had too much include jitters, anxiety, headaches, heartburn and a racing heart. [17]

Check first

Caffeine-based formulas aren't suitable if you're under 18, pregnant or breastfeeding, or sensitive to caffeine. If you have high blood pressure or a heart condition, or take any medication (including antidepressants and heart or thyroid medicines, which caffeine can interact with), check with your GP or pharmacist before using one. [17] [1] 1510 also contains 200 mg of bitter orange (p-synephrine) per serve, so the same cautions apply.

Which formula suits you?

Who they suit

• First-timers

  Get your protein, steps and sleep in place first, then add one product. If caffeine doesn't agree with you, start with Ichor.

• People who train

  1510 supports energy and focus for sessions, and Ichor contains OEA, studied for its role in supporting fullness when you're eating less.

• People who don't train yet

  A formula can support your energy for daily walks and new habits, and Ichor's OEA has been studied for its role in supporting fullness between meals. Pair either with a protein-rich diet. [19]

• Women and men alike

  Elysium is a wellness formula with D-aspartic acid, Bulbine natalensis and luteolin, studied for supporting daily vitality, exercise performance and recovery. Read more in hormone support for women and hormone support for men.

Pair it with protein

Protein supports keeping muscle while you lose fat and keeps you fuller between meals. Higher-protein diets of 1.2 to 1.6 g per kg a day support weight management and appetite. [19] A whey and collagen blend like Inception Labs Collagen Whey Protein makes that easy. Work out your number with the protein calculator.

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