8 Supplements That Are a Waste of Money (And 3 That Actually Work)

The global supplement industry is projected to exceed $300 billion by 2028, yet the vast majority of products on the market have little to no scientific evidence supporting their claims. If you are spending money on fat burners, detox teas, or garcinia cambogia, the research is clear: you are likely wasting your money. But not all supplements are worthless. Below, we break down 8 supplements you should stop buying and 3 that are genuinely supported by peer-reviewed evidence, complete with monthly costs, evidence ratings, and practical verdicts.

The 8 Supplements That Are a Waste of Money

1. Fat Burners

Fat burner supplements typically contain caffeine, green tea extract, capsaicin, and various proprietary blends. They are marketed as metabolism boosters that accelerate fat loss. The actual research tells a different story.

A meta-analysis by Jurgens et al. (2012) published in The Cochrane Database of Systematic Reviews examined green tea preparations for weight loss and found an average difference of less than 1 kg compared to placebo over 12 weeks. Most commercial fat burners cost between €25 and €60 per month for a sub-kilogram difference that disappears once you stop taking them. The stimulant content can also elevate heart rate and blood pressure, creating health risks that outweigh the negligible benefits.

Typical monthly cost: €25-60 Evidence level: Very weak Verdict: Skip it. A calorie deficit does the work that fat burners pretend to do.

2. BCAAs (Branched-Chain Amino Acids)

BCAAs, leucine, isoleucine, and valine, were once considered essential for muscle preservation and recovery. However, if you already consume adequate protein from food, supplemental BCAAs provide no additional benefit.

Jackman et al. (2017) published a study in Frontiers in Physiology showing that while BCAAs alone stimulated muscle protein synthesis, the response was 22% less than that achieved with a complete protein source containing all essential amino acids. In practical terms, a glass of milk or a serving of chicken provides the same amino acids in a more complete and affordable package.

Typical monthly cost: €20-35 Evidence level: Weak (redundant if protein intake is adequate) Verdict: Unnecessary. Spend the money on actual food with complete protein.

3. Detox Teas

Detox teas claim to cleanse your body of toxins, boost metabolism, and promote weight loss. There is no credible scientific evidence for any of these claims. Your liver and kidneys already perform detoxification continuously and effectively.

Many detox teas contain senna, a stimulant laxative that causes water loss and gastrointestinal distress. The "weight loss" people experience is water and bowel content, not fat. A 2015 review by Klein and Kiat published in the Journal of Human Nutrition and Dietetics concluded that there is no rigorous clinical evidence supporting the use of detox diets or products for weight management or toxin elimination (Klein & Kiat, 2015).

Typical monthly cost: €20-45 Evidence level: None Verdict: Complete waste. Drink water or plain tea instead.

4. CLA (Conjugated Linoleic Acid)

CLA was widely promoted in the 2000s as a natural fat-loss compound. While some studies in rodents showed promising results, human trials have been disappointing.

Whigham et al. (2007) conducted a meta-analysis published in the American Journal of Clinical Nutrition and found that CLA supplementation produced an average fat loss of only 0.09 kg per week compared to placebo. At a typical dose of 3.2 g/day, this amounts to roughly 1 kg of extra fat loss over three months at a cost of approximately €25-40/month. The effect is real but so small it is practically meaningless.

Typical monthly cost: €25-40 Evidence level: Weak (statistically significant but clinically irrelevant) Verdict: Not worth the cost for a barely detectable effect.

5. Garcinia Cambogia

Garcinia cambogia extract containing hydroxycitric acid (HCA) became a mainstream supplement after being promoted on daytime television. Multiple meta-analyses have since debunked its supposed benefits.

Onakpoya et al. (2011) published a systematic review in the Journal of Obesity examining 12 randomized controlled trials. They found that garcinia cambogia produced a small, statistically significant difference in weight loss compared to placebo, but the effect size was tiny and the overall quality of evidence was poor. Several of the included studies had significant methodological flaws (Onakpoya et al., 2011).

Typical monthly cost: €15-30 Evidence level: Very weak (poor study quality) Verdict: Debunked. Save your money.

6. Raspberry Ketones

Raspberry ketones are the aromatic compound that gives raspberries their smell. They became a popular weight loss supplement based almost entirely on a single rodent study and celebrity endorsement. As of 2026, there are no published human clinical trials demonstrating that raspberry ketone supplements cause fat loss.

The rodent study by Morimoto et al. (2005) used doses equivalent to roughly 100 times what a human would typically consume in supplement form. Extrapolating rodent data at extreme doses to humans taking standard capsules is not scientifically valid.

Typical monthly cost: €15-25 Evidence level: None (no human studies) Verdict: Zero evidence in humans. Do not buy.

7. Apple Cider Vinegar Pills

Apple cider vinegar has been attributed almost magical health properties by wellness influencers. The supplement industry capitalized by selling concentrated pills and gummies. The actual research is thin.

The most frequently cited study is by Kondo et al. (2009), published in Bioscience, Biotechnology, and Biochemistry, which found that Japanese adults consuming 1-2 tablespoons of vinegar daily lost 1-2 kg more than the placebo group over 12 weeks. This is one small study in a specific population, and the effect is modest. Concentrated vinegar pills may not even deliver the same dose, and they carry a risk of esophageal irritation and tooth enamel erosion.

Typical monthly cost: €10-25 Evidence level: Minimal (one small study, pill form untested) Verdict: Use actual vinegar in cooking if you enjoy it. Pills are not worth buying.

8. Collagen for Weight Loss

Collagen supplements have become popular for skin, joint, and hair health, with some marketing extending the claims to weight loss. While collagen is a protein, it is an incomplete protein that lacks tryptophan and is low in several essential amino acids. It is not an effective protein source for muscle building or metabolic support compared to whey, casein, or whole food proteins.

There is some evidence for collagen supporting joint comfort and skin elasticity, but the weight loss claims have no scientific basis. A 2019 review by de Miranda et al. published in Nutrients found no evidence supporting collagen peptides as a weight loss intervention (de Miranda et al., 2019).

Typical monthly cost: €20-40 Evidence level: None for weight loss Verdict: May have benefits for joints and skin, but it is not a weight loss supplement.

The 3 Supplements That Actually Work

1. Creatine Monohydrate

Creatine is the single most researched sports supplement in history, with over 500 peer-reviewed studies supporting its efficacy and safety. It works by increasing phosphocreatine stores in muscle, allowing for greater ATP regeneration during high-intensity exercise.

Kreider et al. (2017) published a comprehensive review in the Journal of the International Society of Sports Nutrition confirming that creatine supplementation increases strength by 5-10%, improves high-intensity exercise performance, and enhances lean mass gains when combined with resistance training. The standard dose is 3-5 g of creatine monohydrate daily. It is one of the few supplements where the evidence is overwhelming and consistent.

Typical monthly cost: €8-15 Evidence level: Very strong (500+ studies) Verdict: Worth it for anyone doing resistance training or high-intensity exercise.

2. Vitamin D

Vitamin D deficiency is remarkably common. Studies estimate that 40-50% of the global population has insufficient vitamin D levels, with rates even higher in northern latitudes and among people who spend most of their time indoors. Vitamin D influences bone health, immune function, mood regulation, and metabolic processes.

Autier et al. (2014) published a systematic review in The Lancet Diabetes & Endocrinology documenting the wide-ranging associations between low vitamin D status and increased risk of metabolic syndrome, cardiovascular disease, and depression. While supplementation may not cure these conditions, correcting a deficiency removes a metabolic headwind that can impair energy, recovery, and overall health.

The recommended daily dose for most adults is 1,000-4,000 IU, ideally confirmed by a blood test measuring 25-hydroxyvitamin D levels.

Typical monthly cost: €5-12 Evidence level: Strong (for correcting deficiency) Verdict: Get tested. If you are deficient, supplementation is cheap and effective.

3. Protein Powder (When Needed)

Protein powder is not magic, but it is a convenient, cost-effective way to increase protein intake when whole food sources are impractical. Whey protein, casein, and plant-based blends all provide complete amino acid profiles that support muscle protein synthesis and satiety.

A meta-analysis by Morton et al. (2018) published in the British Journal of Sports Medicine found that protein supplementation significantly enhanced gains in muscle mass and strength during resistance training, particularly when total daily protein intake exceeded 1.6 g/kg. The benefit comes from hitting adequate total protein, not from the supplement itself being superior to food.

Typical monthly cost: €15-30 Evidence level: Strong (as a protein delivery vehicle) Verdict: Useful if you struggle to meet protein targets through food alone. Not necessary if your diet already provides enough.

Summary Table: All 11 Supplements Rated

#	Supplement	Monthly Cost	Evidence Rating	Verdict
1	Fat burners	€25-60	Very weak	Skip
2	BCAAs	€20-35	Weak	Unnecessary
3	Detox teas	€20-45	None	Complete waste
4	CLA	€25-40	Very weak	Not worth the cost
5	Garcinia cambogia	€15-30	Very weak	Debunked
6	Raspberry ketones	€15-25	None	Zero human evidence
7	Apple cider vinegar pills	€10-25	Minimal	Not worth buying
8	Collagen (for weight loss)	€20-40	None	Wrong use case
9	Creatine	€8-15	Very strong	Worth it
10	Vitamin D	€5-12	Strong	Worth it if deficient
11	Protein powder	€15-30	Strong	Worth it if needed

Why Tracking Makes Most Supplements Unnecessary

The majority of supplements in the "waste" category exist because people are looking for shortcuts around poor nutrition. Fat burners promise to offset overeating. BCAAs promise to compensate for inadequate protein. Detox teas promise to undo dietary damage. None of these work because they address symptoms rather than the root cause.

When you accurately track your nutrition, you know exactly how much protein, fiber, and micronutrients you consume. Gaps become visible. Solutions become specific. Instead of guessing and throwing money at supplements, you can adjust your actual food intake to hit your targets.

Nutrola makes this straightforward. AI photo logging lets you snap a picture of your plate and get an instant nutrient breakdown. Voice logging means you can say what you ate without typing. Barcode scanning covers packaged foods with 95%+ accuracy, and every entry is verified against a 100% nutritionist-curated food database. The AI Diet Assistant can identify genuine nutritional gaps in your diet and suggest food-first solutions.

When tracking reveals that you consistently fall short on vitamin D or protein, then supplementation makes sense, and you know exactly why you are taking it. That targeted approach saves money and delivers actual results. Plans start at €2.50/month with a 3-day free trial, with no ads on any tier.

FAQ

Are fat burner supplements worth it?

No. Research shows fat burners produce less than 1 kg of additional weight loss over 12 weeks compared to placebo (Jurgens et al., 2012). The effect is negligible, temporary, and comes with potential side effects including elevated heart rate and blood pressure. A calorie deficit achieves far more at zero cost.

Do BCAAs help build muscle?

Only if you are not eating enough protein. If your total daily protein intake is adequate (1.6-2.2 g/kg body weight), BCAAs provide no additional muscle-building benefit. Jackman et al. (2017) showed that BCAAs alone were 22% less effective at stimulating muscle protein synthesis than a complete protein source. Whole foods and protein powder are better options.

Is creatine safe to take long term?

Yes. Creatine monohydrate is the most studied sports supplement in history, with over 500 peer-reviewed studies. Kreider et al. (2017) confirmed its safety and efficacy for long-term use at standard doses of 3-5 g per day. It does not cause kidney damage in healthy individuals and is not a steroid.

How do I know if I need vitamin D supplements?

The most reliable method is a blood test measuring your 25-hydroxyvitamin D level. Levels below 30 ng/mL are generally considered insufficient, and below 20 ng/mL is deficient. Given that 40-50% of the global population has insufficient levels, testing is worthwhile, especially if you live in a northern climate or spend limited time outdoors.

Do detox teas actually remove toxins from your body?

No. Your liver and kidneys perform detoxification continuously. Klein and Kiat (2015) concluded in their review that no credible clinical evidence supports detox products for toxin elimination or weight loss. Many detox teas contain laxatives that cause water loss, creating an illusion of weight loss on the scale.

Can protein powder replace meals?

Protein powder is a supplement, not a meal replacement. It provides protein but lacks the fiber, micronutrients, healthy fats, and phytochemicals found in whole foods. Morton et al. (2018) confirmed that the benefit of protein supplementation comes from meeting total daily protein targets, not from any unique property of the powder itself. Use it to fill gaps, not as a dietary foundation.