Top 8 Best Appetite Suppressant Supplements for Weight Loss (2026)
8 picks — ranked by our 50/50 methodology
- #1Best overall
NOW Foods Glucomannan 575 mg
NOW Foods · konjac (Amorphophallus konjac) soluble fiber, 575 mg, 180 veg capsules8.7/10SAC Product Score™SAC Product Score™ — how it breaks down- Evidence for satiety40%8.6
- Mechanism & dose25%9.0
- Purity & testing20%8.8
- Value (cost per serving)15%9.0
A highly viscous soluble fiber that fills the stomach and slows gastric emptying — the best-evidenced over-the-counter satiety mechanism, from a trusted brand at a fair price. Take it before meals with a full glass of water (never dry).
- Active
- Glucomannan (konjac) soluble fiber, 575 mg per cap
- Dose
- ~1 g (3 caps) + a FULL glass of water before meals
- Size
- 180 veg capsules
- Quality
- Non-GMO, GMP, NOW in-house QA
Pros- Viscous fiber that genuinely fills the stomach and slows digestion — a real satiety mechanism (Keithley 2005)
- Strong fullness per gram, so a modest pre-meal dose works
- Trusted brand, non-GMO, GMP-quality, and inexpensive per serving
- Doubles as a soluble-fiber and regularity benefit
Cons- CHOKING RISK if taken dry — must always be taken with a full glass of water, never lying down
- Boosts fullness but a meta-analysis found no significant weight loss on its own (Onakpoya 2014) — it's a deficit helper, not a fat burner
Our take — For an honest, evidence-first appetite tool, glucomannan is the one to start with — and NOW's is the trustworthy, affordable version. It's a viscous soluble fiber that swells in your stomach and slows gastric emptying, which is the best-supported over-the-counter way to feel full sooner (Keithley 2005). Two honest caveats keep this grounded: first, the safety rule — you MUST take it with a full glass of water, never dry, because it expands dramatically and can choke you otherwise; and second, the evidence — it reliably increases fullness, but a pooled analysis of RCTs found it does not by itself produce significant weight loss (Onakpoya 2014). Used correctly, before meals, it makes eating less genuinely easier, which is exactly what an appetite aid should do. That's why it's #1 — real mechanism, real safety guidance, no hype.
- #2Best psyllium (most-replicated)
Metamucil 3-in-1 Psyllium Fiber Capsules
Metamucil (P&G) · psyllium husk soluble fiber, 3-in-1, 300 capsules8.6/10SAC Product Score™SAC Product Score™ — how it breaks down- Evidence for satiety40%8.8
- Mechanism & dose25%8.4
- Purity & testing20%8.6
- Value (cost per serving)15%8.4
The exact psyllium fiber used in the best-replicated pre-meal satiety trials, in convenient capsules — plus a real cholesterol and regularity bonus. Take before meals with a full glass of water.
- Active
- Psyllium husk soluble fiber
- Dose
- Capsules before meals with a full glass of water
- Size
- 300 capsules (single bottle)
- Quality
- Plant-based, no added sweetener; mainstream brand QA
Pros- Psyllium before meals cut hunger + desire to eat and raised fullness in two double-blind RCTs (Brum 2016) — the strongest pre-meal satiety evidence on this list
- It's the very psyllium (Metamucil) used in those satiety studies
- Adds well-established LDL-cholesterol-lowering and regularity benefits
- Capsule form is convenient — no gritty drink to mix
Cons- Capsules deliver less fiber per piece than a powder scoop, so you take several
- Like all psyllium, must be taken with plenty of water; can cause initial gas/bloating
Our take — If you want the appetite tool with the cleanest pre-meal satiety evidence, psyllium is it, and Metamucil is the brand that was actually studied. In two double-blind, placebo-controlled crossover trials, taking psyllium before breakfast and lunch significantly reduced hunger and desire to eat and increased fullness between meals (Brum 2016) — exactly the effect you want from an appetite suppressant, and better-replicated than anything else here. On top of that you get psyllium's proven cholesterol and regularity benefits, which no herbal pill offers. It sits just behind glucomannan only because capsules deliver fiber a bit less efficiently than a concentrated konjac dose, and you'll swallow several before a meal. Take them with a full glass of water, ramp up slowly to avoid gas, and you have a safe, evidence-backed, multi-benefit pick.
- #3Best protein (most satiating)
Optimum Nutrition Gold Standard 100% Whey
Optimum Nutrition · whey protein blend, 24 g protein per scoop, 2 lb8.6/10SAC Product Score™SAC Product Score™ — how it breaks down- Evidence for satiety40%8.8
- Mechanism & dose25%8.8
- Purity & testing20%8.6
- Value (cost per serving)15%8.2
Protein is the most satiating macronutrient and the most honest 'appetite suppressant' on this list — and this is the category-standard whey at excellent value. A scoop keeps you fuller than any herbal pill here.
- Active
- Whey protein (isolate + concentrate), 24 g protein/scoop
- Dose
- 1 scoop (~24 g) in water/milk, or 25-30 g protein per meal
- Size
- 2 lb tub (≈29 servings)
- Quality
- Banned-substance tested; 35-year trusted brand
Pros- Protein is the most satiating macronutrient; whey lowers short-term appetite + raises fullness hormones (Astrup 2013)
- Functionally outperforms most herbal 'appetite pills' for keeping you full
- Protects muscle while you're in a calorie deficit
- Banned-substance tested, mixes cleanly, outstanding value per gram
Cons- It's protein, not a dedicated 'suppressant' — works by replacing/anchoring meals, not as a magic pill
- Adds calories, so it must fit your overall deficit (swap it in for less-satiating food, don't just pile it on)
Our take — This is the pick that follows the evidence to its logical end: the single most reliable, best-tolerated 'appetite suppressant' available over the counter is protein, and a quality whey is the easiest way to get more of it. Reviews of controlled trials (Astrup 2013) show whey lowers short-term appetite and raises the gut hormones that signal fullness — and in real life, a 24 g scoop or a high-protein meal simply keeps you fuller for longer than any herbal pill on this list, while protecting muscle in a deficit. Optimum Nutrition's Gold Standard is the category benchmark: banned-substance tested, clean-mixing, and excellent value per gram. The only reason it's #3 rather than higher is framing — it works by anchoring meals and crowding out less-satiating food, not as a stand-alone pill, and the calories have to fit your deficit. Use it that way and it beats most of the products marketed specifically as appetite suppressants.
- #4Best grass-fed protein
Garden of Life Sport Grass-Fed Whey
Garden of Life · grass-fed whey protein isolate, 24 g protein, + probiotics, 20 servings8.4/10SAC Product Score™SAC Product Score™ — how it breaks down- Evidence for satiety40%8.6
- Mechanism & dose25%8.6
- Purity & testing20%9.0
- Value (cost per serving)15%7.4
The same protein-satiety lever as #3, in a grass-fed, NSF-Certified-for-Sport, probiotic-added isolate for shoppers who want the cleanest-label whey. A premium take on the most honest appetite tool.
- Active
- Grass-fed whey protein isolate, 24 g protein/scoop
- Added
- Probiotics + glutamine; NSF Certified for Sport
- Size
- 20 servings
- Quality
- Grass-fed, non-GMO, gluten-free, cold-processed, third-party certified
Pros- Same protein-satiety benefit as any quality whey (Astrup 2013), in a cleaner-label grass-fed isolate
- NSF Certified for Sport and Informed-Choice-level testing — strong third-party verification
- Grass-fed, non-GMO, gluten-free, with added probiotics
- Whey isolate is lower in lactose — easier on sensitive stomachs
Cons- Premium price and a smaller tub — the highest cost per serving of the proteins here
- Same honest framing as #3: it's protein, not a magic suppressant; calories must fit your deficit
Our take — Garden of Life Sport is the clean-label protein pick for someone who wants the protein-satiety benefit with the most rigorous testing and sourcing. The appetite mechanism is identical to any good whey — protein is the most satiating macronutrient (Astrup 2013) — but here it comes as a grass-fed, cold-processed isolate that's NSF Certified for Sport, non-GMO, gluten-free, and lower in lactose, with probiotics added. That third-party certification is genuinely best-in-class and matters if you're drug-tested or simply want maximum label trust. It ranks #4 rather than #3 purely on value: the tub is smaller and the price per serving is the highest of the proteins, and 'grass-fed' buys you a cleaner label, not extra appetite effect. If sourcing and certification outrank cost for you, it's an easy, honest choice.
- #5Best value (soluble fiber)
NOW Foods Psyllium Husk 500 mg
NOW Foods · psyllium husk soluble fiber, 500 mg, 500 veg capsules8.4/10SAC Product Score™SAC Product Score™ — how it breaks down- Evidence for satiety40%8.4
- Mechanism & dose25%8.2
- Purity & testing20%8.6
- Value (cost per serving)15%9.0
The same evidence-backed psyllium satiety mechanism as #2, in a no-frills 500-count bottle from a trusted brand — the lowest cost per serving among the fibers. Take before meals with a full glass of water.
- Active
- Psyllium husk soluble fiber, 500 mg per cap
- Dose
- Several caps before meals with a full glass of water
- Size
- 500 veg capsules — large supply
- Quality
- Non-GMO Project Verified, vegan, GMP
Pros- Same psyllium satiety mechanism backed by Brum 2016 — fills the stomach, slows emptying
- Huge 500-count bottle = the lowest honest cost per serving among the fibers
- Non-GMO Project Verified, vegan, GMP-quality from a trusted brand
- Bonus cholesterol and regularity benefits, like all psyllium
Cons- At 500 mg per cap you swallow several to reach a meaningful pre-meal fiber dose
- No-frills capsules; must be taken with plenty of water (gas/bloating possible at first)
Our take — NOW Psyllium Husk is the value play among the evidence-backed fibers — the same satiety mechanism as the Metamucil pick (Brum 2016) at the lowest cost per serving on the list, thanks to a 500-count bottle. The glycine of fibers, essentially: cheap, clean, and effective for what it does. It lands at #5 rather than #2 for two practical reasons — at 500 mg per capsule you need several to hit a meaningful pre-meal dose, and it lacks the specific brand pedigree of the exact product used in the trials. But the psyllium itself is identical in function, Non-GMO Project Verified, and vegan. If you respond to fiber and want the cheapest sustainable supply, this is the smart re-buy. Take it with a full glass of water before meals and ramp up gradually.
- #6Herbal option — limited evidence
NOW Foods 5-HTP 100 mg
NOW Foods · 5-HTP (5-hydroxytryptophan) from Griffonia simplicifolia, 100 mg, 60 veg capsules7.1/10SAC Product Score™SAC Product Score™ — how it breaks down- Evidence for satiety40%6.4
- Mechanism & dose25%7.4
- Purity & testing20%7.6
- Value (cost per serving)15%7.6
A serotonin precursor with some small studies on reduced intake — but limited evidence and real drug interactions. A trustworthy brand of a weak-evidence ingredient, ranked honestly below fiber and protein.
- Active
- 5-HTP from Griffonia simplicifolia, 100 mg per cap
- Dose
- 1 cap, often before a meal or at night (start low)
- Size
- 60 veg capsules
- Quality
- Non-GMO, GMP, NOW in-house QA
Pros- Plausible mechanism: as a serotonin precursor it may influence satiety in some people
- Some small studies suggest reduced food intake
- Clean, trustworthy NOW formulation, non-GMO and GMP-quality
- Inexpensive to trial
Cons- Evidence for appetite/weight is limited and far weaker than fiber or protein
- Can interact with antidepressants (SSRIs/SNRIs) and other serotonergic drugs — do not combine without medical advice; may cause drowsiness/GI upset
Our take — 5-HTP is where this list crosses from evidence-backed into experimental, and we rank it honestly. As a serotonin precursor it has a plausible appetite mechanism and a few small studies hinting at reduced food intake, but the evidence is thin and nowhere near the strength of soluble fiber or protein. There's also a real safety caveat: 5-HTP raises serotonin, so it can interact dangerously with antidepressants and other serotonergic medications, and it may cause drowsiness or GI upset — this is not a casual stack-on-everything supplement. NOW's version is a clean, trustworthy, inexpensive way to trial the ingredient IF you've cleared it with a doctor and you go in with low expectations. For most people, the fiber and protein picks above are a better, safer use of money. It earns a mid-table spot for a plausible mechanism and a quality brand, not for proven results.
- #7Best-evidenced herbal (still thin)
NusaPure Caralluma Fimbriata 1600 mg
NusaPure · Caralluma fimbriata extract, 1,600 mg, 180 veggie capsules (non-GMO, vegan)7.1/10SAC Product Score™SAC Product Score™ — how it breaks down- Evidence for satiety40%6.6
- Mechanism & dose25%7.0
- Purity & testing20%7.6
- Value (cost per serving)15%8.0
A traditional appetite-control botanical with one decent 16-week RCT behind it (reduced intake + waist) — but a thin, conflicting wider literature. The best-evidenced herbal here, which still isn't saying much.
- Active
- Caralluma fimbriata extract, 1,600 mg per serving
- Dose
- Per label, typically before meals
- Size
- 180 veggie capsules
- Quality
- Non-GMO, vegan; NusaPure standard
Pros- One reasonably good 16-week RCT (Rao 2021) found lower caloric intake + reduced waist vs placebo
- Traditional appetite-suppressant botanical with a plausible (if unproven) hypothalamic mechanism
- Non-GMO, vegan, generous 180-capsule bottle
- Stimulant-free, unlike many 'diet pills'
Cons- The broader human evidence is thin and conflicting — one positive trial is not a strong base
- Smaller brand; testing transparency below the NOW / mainstream picks, and effect is modest at best
Our take — Caralluma fimbriata is the best-evidenced of the herbal appetite suppressants here — and that's a low bar we want to be honest about. It does have one genuinely decent study in its favor: a 16-week randomized controlled trial (Rao 2021) in which participants taking the extract reduced their caloric intake by roughly 245 calories and trimmed waist circumference versus placebo. That's more than most herbals can show. But a single positive trial against a thin and conflicting wider literature is a 'maybe,' not a proven tool, and the effect is modest. NusaPure's is a stimulant-free, non-GMO, vegan, generously sized bottle at a fair price, so if you want to experiment with a botanical, this is a reasonable one to choose. Just rank your expectations accordingly — and keep fiber, protein, and a calorie deficit as the real foundation. It sits at #7 because plausible-plus-one-study still loses to the genuinely evidence-backed picks above.
- #8Carb blocker — weak evidence
NOW Foods Phase 2 White Kidney Bean 500 mg
NOW Foods · Phase 2 white kidney bean extract, 500 mg, 120 veg capsulesSAC Product Score™ — how it breaks down- Evidence for satiety40%6.0
- Mechanism & dose25%6.8
- Purity & testing20%8.6
- Value (cost per serving)15%8.0
A non-stimulant 'carb blocker' that inhibits a starch-digesting enzyme — a real mechanism, but small and inconsistent real-world effects. A trustworthy brand of a weak-evidence concept, and it isn't strictly an appetite suppressant.
- Active
- Phase 2 white kidney bean extract, 500 mg per cap
- Dose
- 3 caps before a starch-containing meal
- Size
- 120 veg capsules
- Quality
- Non-stimulant; NOW GMP / in-house QA
Pros- Real, specific mechanism: inhibits alpha-amylase to slow starch digestion (Phase 2 is the studied branded extract)
- Non-stimulant and well-tolerated; trustworthy NOW quality
- Reasonable price; targeted use before high-starch meals
- May cause modestly reduced post-meal glucose for some people
Cons- Real-world weight-loss effects are small and inconsistent across trials
- It blocks some carb absorption rather than suppressing appetite — different goal, and can cause gas/GI upset from undigested starch
Our take — NOW's Phase 2 white kidney bean extract rounds out the list as the honest 'carb blocker' — and we include it mainly to address it fairly, because it's heavily marketed in the weight-loss aisle. The mechanism is real and specific: Phase 2 inhibits alpha-amylase, the enzyme that breaks down dietary starch, so in theory fewer starch calories get absorbed. The problem is the payoff: across human trials the real-world weight effects are small and inconsistent, and it isn't truly an appetite suppressant — it doesn't make you less hungry, it (partially) blocks carbs you've already eaten, which can also mean gas from undigested starch. NOW's is a non-stimulant, GMP-quality, fairly priced version if you specifically want to experiment with carb-blocking before high-starch meals. But it ranks last because it's the furthest from the page's actual job — curbing appetite — and the evidence is the weakest of the included picks. Fiber, protein, and a deficit beat it comfortably.
▸ Affiliate disclosure: every Amazon link uses our Associates tag (superachieverclub-20). We earn a small commission at no cost to you; it funds independent reviews. We never accept payment to change a ranking.
"Best appetite suppressant" is one of the most-searched supplement queries on the internet — and one of the most over-promised. So before any ranking, here's the part most listicles bury: the ONLY appetite tools with solid human evidence are soluble FIBER (glucomannan, psyllium) taken before meals with a full glass of water, and PROTEIN. Almost everything else marketed as an 'appetite pill' — 5-HTP, caralluma, white-kidney-bean 'carb blockers,' and especially Garcinia cambogia — is weak, rests on one or two small trials, or barely beats placebo. We rank evidence-first, which means the fiber and protein options sit at the top because that's where the science is, and the popular herbals sit below with their weak or mixed evidence stated plainly. Start with how the good options actually work. Glucomannan and psyllium are viscous soluble fibers: they absorb water and swell into a thick gel that physically fills the stomach and slows gastric emptying, so you feel full sooner and longer (Keithley 2005, PMID 16320857; Brum 2016, PMID 27166077). That satiety effect is real. But be honest about the limit: when researchers pooled the randomized trials of glucomannan, the 2014 meta-analysis (Onakpoya, PMID 24533610) found it does NOT produce statistically significant weight loss on its own. Fiber makes eating less easier; it is not a fat-loss drug. There's also a safety rule you must respect — glucomannan swells dramatically in liquid, so it must be taken with a FULL glass of water and NEVER dry, or it can expand in the throat and choke you. Protein, meanwhile, is simply the most satiating macronutrient: whey lowers short-term appetite and raises fullness hormones (Bendtsen/Astrup 2013, PMID 23858091), which makes a protein shake or a high-protein meal a more honest 'appetite suppressant' than most pills sold as one. The popular herbals get ranked honestly, not hyped. 5-HTP has limited evidence and can interact with antidepressants. Caralluma fimbriata has exactly one decent 16-week RCT (Rao 2021, PMID 33762661) showing lower caloric intake and waist circumference versus placebo — encouraging, but a thin and conflicting wider literature, so it's a 'maybe.' White-kidney-bean carb-blockers blunt a starch-digesting enzyme but show small, inconsistent real-world effects. And Garcinia cambogia is deliberately EXCLUDED: its pooled trials show a trivial ~0.88 kg difference (Onakpoya 2011, J Obesity, DOI 10.1155/2011/509038) and HCA carries liver-injury case reports — a tiny-at-best benefit against a real risk is not something we'll list. We verified eight real, currently-listed Amazon products and scored each on four things that actually differ: evidence for satiety (40%), mechanism and a usable dose (25%), purity and testing (20%), and value (15%). The only thing that reliably drives weight loss remains a sustained calorie deficit — these are helpers, not the plan.
Just tell me what to buy: get NOW Glucomannan (#1) — a viscous soluble fiber that genuinely fills you up before meals, cheap and evidence-backed for satiety (take 3 caps with a FULL glass of water, never dry). Want the best-replicated pre-meal satiety plus a cholesterol/regularity bonus: Metamucil Psyllium capsules (#2). Want the most satiating, most honest option of all: protein — Optimum Nutrition Whey (#3) or Garden of Life Sport Whey (#4) for a grass-fed, probiotic option. Cheapest soluble-fiber route: NOW Psyllium Husk (#5). Then the weaker, popular herbals, ranked honestly: NOW 5-HTP (#6) has limited evidence and antidepressant interactions; Caralluma Fimbriata (#7) has one decent RCT but a thin field; NOW Phase 2 White Kidney Bean (#8) is a carb-blocker with small, inconsistent effects. Garcinia cambogia is excluded on the evidence. Whatever you pick, the honest framing holds — fiber and protein make a calorie deficit easier to hold, they don't replace it.
How we ranked these eight
Each pick was scored 0-10 across four criteria, then weighted to a final composite. Evidence for satiety carries the most weight (40%) because this is a category drowning in hype — the entire point is to reward the few products with real human evidence for curbing appetite (soluble fiber before meals, protein) and to demote the ones without it. Mechanism and dose (25%) asks whether there's a plausible biological reason it would work AND whether the product delivers a usable, studied amount (real glucomannan/psyllium grams, ~25 g protein) rather than a token sprinkle. Purity and testing (20%) covers label transparency, third-party or GMP quality, and a clean form — this category is lightly regulated. Value (15%) is cost per effective serving; fiber and protein are cheap, so you should never pay a premium for an 'appetite' label. We do not invent numbers: the only clinical figures we cite are the published studies, and we state their limits — and the Garcinia exclusion — plainly. The glucomannan choking warning is surfaced on its pick because safety is part of an honest recommendation.
- Evidence for satiety40%
Is there real human evidence that this curbs appetite or food intake? Soluble fiber before meals (Keithley 2005; Brum 2016) and protein (Astrup 2013) score highest; single-study or mixed herbals score low; ingredients with trivial or negative evidence (Garcinia) are excluded entirely. This is the dominant criterion because the category's biggest failure is hype without evidence.
- Mechanism & dose25%
Is there a plausible mechanism, and does the product deliver a usable, studied dose? Viscous fiber that fills the stomach and protein that triggers fullness hormones have clear mechanisms; we also check the product hits a real amount (≈1 g glucomannan or several grams of psyllium before meals, ~25 g protein) rather than a marketing-sized sprinkle.
- Purity & testing20%
Label transparency, third-party testing or GMP/established-brand QA, and a clean form (plain fiber, real whey — not a proprietary 'fat-burn' blend). This category is lightly regulated and full of hype labels, so verification is what separates a trustworthy product from an anonymous one.
- Value (cost per serving)15%
Price divided by the number of effective servings. Fiber and protein are inherently cheap, so a big-count fiber bottle or a value tub of whey wins decisively; paying a premium for an 'appetite suppressant' label over plain fiber or protein is penalized.
The bottom line
If you've read this far and just want to be told what to buy: NOW Glucomannan (#1) is the overall winner — a viscous soluble fiber that genuinely fills you up before meals, cheap and evidence-backed for satiety; take 3 caps with a FULL glass of water, never dry. Metamucil Psyllium capsules (#2) have the best-replicated pre-meal satiety evidence plus a cholesterol and regularity bonus. For the most satiating, most honest option of all — protein — choose Optimum Nutrition Whey (#3), or Garden of Life Sport (#4) if you want a grass-fed, certified isolate. NOW Psyllium Husk (#5) is the cheapest fiber route. Below that come the weaker, popular herbals, ranked honestly: NOW 5-HTP (#6, limited evidence and antidepressant interactions), Caralluma Fimbriata (#7, one decent RCT but a thin field), and NOW Phase 2 White Kidney Bean (#8, a carb-blocker with small, inconsistent effects).
But the most important thing on this page isn't the ranking — it's the honesty. The only over-the-counter appetite tools with solid evidence are soluble FIBER before meals (with water) and PROTEIN; the herbal pills are weak, single-study, or mixed; and Garcinia cambogia is excluded outright because its effect is trivial and it carries liver-safety reports. Respect the glucomannan choking rule every single time. And remember the mechanism that actually matters: the only thing that reliably drives fat loss is a sustained calorie deficit, supported by protein, fiber, and movement. Used as intended — fiber before your biggest meals, protein at every meal, and these supplements as helpers on top of a deficit — they make eating less genuinely easier. Sold as a shortcut, none of them is one, and we won't pretend otherwise.
Every claim ranked above traces back to one of these
The clinical research and verified product specs behind the picks. Studies link to their abstract on PubMed; product specs link to the manufacturer's listing.
- [1]Keithley 2005
Glucomannan and obesity: a critical review
Critical review of glucomannan, a soluble, highly viscous fiber from konjac. Found evidence that glucomannan promotes satiety and fecal energy loss and, at 2-4 g/day, was well tolerated. Establishes the real, mechanistic basis for glucomannan as a pre-meal satiety aid — feeling fuller — while later RCT pooling (Onakpoya 2014) shows that satiety does not translate into reliable weight loss on its own.
- [2]Onakpoya 2014
The efficacy of glucomannan supplementation in overweight and obesity: a systematic review and meta-analysis of randomized clinical trials
Systematic review and meta-analysis of randomized controlled trials. Concluded that 'the evidence from available RCTs does not show that glucomannan intake generates statistically significant weight loss.' This is the honest counterweight to the satiety story: glucomannan can increase fullness, but it does not, by itself, reliably reduce body weight — which is why we frame fiber as a deficit-helper, not a fat-loss drug.
- [3]Brum 2016
Satiety effects of psyllium in healthy volunteers
Two randomized, double-blind, placebo-controlled crossover trials in healthy adults. Psyllium taken before breakfast and lunch produced directional-to-significant reductions in inter-meal hunger and desire to eat and increased fullness versus placebo, with a 6.8 g dose most consistent. The best-replicated pre-meal satiety evidence on this page — the basis for ranking psyllium near the top as a genuine appetite tool.
- [4]Astrup 2013 (Bendtsen)
Effect of dairy proteins on appetite, energy expenditure, body weight, and composition: a review of the evidence from controlled clinical trials
Review of controlled clinical trials on dairy proteins. Found that protein induces satiety and increases gastrointestinal satiety-hormone secretion, with whey more satiating in the short term (casein more so long-term). Supports the page's core honest point: protein is the most satiating macronutrient and the most reliable over-the-counter 'appetite suppressant' — outperforming the herbal pills.
- [5]Rao 2021
The effect of an orally-dosed Caralluma Fimbriata extract on appetite control and body composition in overweight adults
Double-blind, randomized, placebo-controlled trial; 83 overweight adults completed 16 weeks of Caralluma fimbriata extract or placebo. The extract group reduced caloric intake by ~245 kcal (vs ~16 kcal placebo), decreased waist circumference (-2.7 cm vs +0.3 cm) and maintained body weight while placebo gained. One genuinely positive trial — the reason caralluma is the best-evidenced herbal here — but the wider literature is thin and conflicting, so it is ranked as a 'maybe,' not a proven tool.
- [6]Onakpoya 2011 (Garcinia — excluded)
The use of Garcinia extract (hydroxycitric acid) as a weight loss supplement: a systematic review and meta-analysis of randomised clinical trials
Meta-analysis of randomized trials of Garcinia cambogia/HCA found only a small difference versus placebo (about -0.88 kg) of questionable clinical relevance, with better-quality trials trending null. Combined with documented case reports of HCA-associated liver injury, this is why Garcinia cambogia is DELIBERATELY EXCLUDED from this list rather than ranked — a trivial-at-best benefit against a real safety concern fails the Trust standard.
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