Food supplements
Supplements: magnesium, whey, creatine, probiotics. We compare on the price of the active ingredient (per 100 mg of magnesium, per kilo of protein) and not on the price of the tub, because doses and pack sizes can vary by a factor of two. Each price is taken from the brand's official page and carries its date. When products are identical, we say so instead of inventing scores.
Waterdrop review: a good flavoured water, not a hydration drink
Waterdrop flavours water with no sugar, with vitamins, and its customer service replies to 96% of negative reviews. It is a good alternative to fizzy drinks,…
PhenQ review: the most expensive, with no doses published and recycled testimonials
PhenQ costs 70 EUR a month and publishes the dose of no ingredient, not even the caffeine. Its headline figure comes from a document from its…
Nutrimuscle review: unbeatable for sport, expensive for health
Nutrimuscle scores 4.5 out of 5 from 29,695 reviews, the largest volume in our research. Our price checks are clear: first on whey, at 41.23 EUR…
Nutrimea review: the cheapest zinc and chromium, the rest to compare
Nutrimea is the cheapest in our price checks on zinc (0.12 EUR per day) and chromium (0.15 EUR), and among the cheapest on the intimate flora…
Nutriforce review: the highest prices and banned claims
Nutriforce is the most expensive in our price checks on comparable products: magnesium 3.2 times the cheapest, zinc 6.8 times, collagen at more than 1,100 EUR…
Nutri&Co review: the dearest per gram, twice the best
Nutri&Co scores 4.6 out of 5 from 5,626 reviews, one of the largest volumes in our research, and replies to 94% of negative reviews. Our price…
Nutri&Co or Nutripure: Nutripure cheaper on all 4 comparable products
On the four comparable products, Nutripure is cheaper for the same amount of active: 9% on whey, 40% on creatine, 44% on magnesium, 64% on marine…
Novoma review: unbeatable vitamin C, creatine and omega-3 too expensive
Novoma scores 4.7 out of 5 from 7,157 reviews and replies to every negative review. Across ten products checked, it is the cheapest of our benchmarks…
Nat&Form review: cheapest on 3 products, too expensive on 4 others
Across thirteen products checked, Nat&Form is the cheapest on three (magnesium bisglycinate at 0.150 EUR per 100 mg, hyaluronic acid, melatonin) and among the most expensive…
Myprotein review: unbeatable on creatine on promotion, not on whey
Myprotein scores 4.1 out of 5 across 32,818 reviews and replies to 99% of negative reviews. Its prices depend on promotions, which are almost permanent: on…
Miniweight review: a guarana capsule that is honest about its composition, not its effects
Miniweight’s Brûle Graisse is a guarana capsule providing up to 115 mg of caffeine, for 1.89 EUR a day. Its composition and precautions are clear, but…
Hydratis review: a pleasant tablet, but too little sodium to rehydrate
Hydratis is a pleasant, low-sugar tablet, rich in potassium and magnesium, but not a rehydration drink: it provides 232 mg of sodium per litre, seven times…
Dynveo review: first on active-ingredient price in four comparisons out of eight
Dynveo scores 4.8 out of 5, one of the best ratings in our research, but from only 496 reviews, ten times fewer than its competitors. Our…
Dynveo or Nutri&Co: Dynveo cheaper on 5 products out of 6
Dynveo is cheaper than Nutri&Co on five of the six products measured at both brands: 54% on marine collagen, 30% on creatine, 33% on magnesium, 34%…
Brûlafine review: the cheapest, but studies quoted wrongly
Brûlafine is the cheapest of the three slimming capsules reviewed, at 26.50 EUR a month, and publishes its doses: 230 mg of EGCG and 44.6 mg…
AqeeLab review: 4.9/5 from customers, never the cheapest
AqeeLab scores 4.9 out of 5, the best rating in our research, but from only 249 reviews. Across six products checked, it is the cheapest on…
Best multivitamins: from 5 to 60 µg of vitamin D depending on the brand
The three multivitamins we compared are nothing alike: vitamin D ranges from 5 to 60 µg a day, none contains iron, and only one contains magnesium,…
Best electrolytes: 8 drinks compared by price of sodium
The useful mineral in a sports drink is sodium, with around 825 mg lost per litre of sweat. The products checked provide from 58 to 500…
Best protein bars: 82 bars, two very different products
Of 82 protein bars, 33 have 5 g of sugars or less per 100 g, but 28 get there thanks to a polyol, mostly maltitol, which…
Best whey protein: compared by price per kilo of protein
Compare by the price per kilo of protein, not the price of the tub: the gap reaches 112% between the products recorded, or 421 EUR a…
Best whey isolate: 6 brands compared by price per kilo of protein
A whey isolate is only worth it if you are lactose intolerant. If that is you, the range runs from 54.69 to 87.38 EUR per kilo…
Best vitamin D: the strongest dose is the cheapest
The Anses adequate intake is 15 µg a day, or 600 IU, and the market sells 1,000 to 2,000 IU. That is safe, as the safety…
Best vitamin C: the same molecule, up to 128 times the price
All the vitamin C supplements compared are L-ascorbic acid, the same molecule. The price per gram runs from 0.039 EUR for Novoma’s 1 kg powder to…
Best vitamin B12 supplement: 13.80 EUR a year is enough
Three of the four B12 supplements we compared contain 1,000 µg per capsule. This is not excessive: the gut absorbs only about 1% of it. Above…
Best spirulina: from 4.50 to 39.78 EUR per 100 g
Choose on the price per 100 g, the phycocyanin content and whether contaminant test results are published, because spirulina fixes the heavy metals of its growing…
Best vegan protein powder: cheaper than whey in bulk
Per kilo of protein, the plant proteins we compared range from 22.20 EUR for Bioptimal’s organic soy isolate in 3 kg to 98.03 EUR for Nutri&Co’s…
Best MCT oil: the powder costs four times more
As oil, 10 g of MCT costs 0.44 to 0.48 EUR; as powder, 1.57 to 1.71 EUR, almost four times more, because the powder contains 30%…
Best creatine: price is the only thing to compare
The brands recorded sell the same product: 100% creatine monohydrate, Creapure label, a single ingredient line. Only the price separates them, from 5.99 to 12.17 EUR…
Best zinc supplement: 0.12 to 0.80 EUR a day, and 10 mg is not always enough
Among six zinc supplements recorded, the cost runs from 0.12 EUR a day for Nutrimea, at 12.5 mg, to 0.80 EUR for Nutriforce. The 10 mg…
Best probiotic for intimate flora: what the meta-analysis says
Probiotics reduce recurrences of bacterial vaginosis by 45% (PMID 36204368), but the meta-regression links this effect neither to the number of strains, nor to the CFU…
Best omega-3: the same label, ten times less EPA
Two products carry the same EPAX label and offer opposite formulas: 1,520 mg of EPA in one, 150 mg in the other, for almost identical DHA.…
Best magnesium supplement: what the comparisons don’t tell you
Choose on the dose of elemental magnesium and the price of that dose, not on the form: the bisglycinate, citrate, oxide ranking rests on small, contradictory…
Best detox drainer: 100 mg of caffeine and water that comes back
A drainer makes you urinate, and the weight lost is water that comes back as soon as you drink. No « drainage » claim is authorised at European…
Best turmeric supplement: check the dose before the price
The five turmeric supplements we compared provide from 50 to nearly 200 mg of curcuminoids a day depending on the brand. In 2022, Anses recorded 15…
Best sleep supplement: melatonin saves you 7 minutes
Melatonin is the only active in sleep supplements whose effect is recognised by the European Union: 1 mg before bed reduces the time to fall asleep,…
Best menopause supplement: 4 hormone-free formulas compared
For hot flushes, the reference remains hormone replacement therapy, to be discussed with a doctor. Hormone-free supplements rely on herbs of modest, variable effectiveness, for 0.32…
Best immune support supplement: 3 packs compared, ingredient by ingredient
No supplement strengthens the immunity of a healthy person. Vitamin D slightly reduces the risk of respiratory infections, especially if you are deficient, and zinc helps…
Best blood sugar supplement: chromium or berberine, what Anses says
Chromium is the only active in blood sugar supplements with a claim authorised by the European Union, for 0.15 EUR a day. Berberine is more potent,…
Best fibre supplement: psyllium powder, not capsules
For psyllium, the question is not the brand but the format. As a powder, 10 g of husk costs 0.28 EUR at KoRo; as capsules, 4.14…
Best iron supplement: 8 products compared by price per 14 mg
Only take iron if a blood test shows low ferritin. The common products all provide 14 mg of iron bisglycinate a day; only the price and…
Hair loss supplements: what the studies really show
These supplements correct a deficiency, they do not treat hair loss. The systematic review on biotin finds only 18 published cases, all in patients with an…
Best joint supplement: 5 glucosamine-chondroitin products compared
The glucosamine-chondroitin pairing showed no clear benefit on knee pain in the large GAIT trial, except in people with moderate to severe pain. If you want…
Best anti-fatigue supplement: rhodiola and ginseng compared
Lasting tiredness is first sorted out with a blood test: iron, vitamin B12 and vitamin D explain many cases. Rhodiola and ginseng have traditional-use status in…
Best marine collagen: a 98% price gap for the same ingredient
The same collagen, under the same Peptan label and in the same 500 g size, sells for 39.90 EUR at one brand and 78.95 EUR at…
Best ashwagandha: the same KSM-66, a 46% price gap
Four of the five ashwagandha supplements we compared use the same organic KSM-66 extract, standardised to 5% withanolides. At 600 mg a day, the price ranges…
Best hyaluronic acid capsules: the dose in studies is 120 mg
Studies on oral hyaluronic acid use 120 mg a day for twelve weeks, and all the products compared exceed this dose. On cost per day, Nutri&Co…
Decathlon whey review: well rated, but expensive per kilo of protein
Decathlon whey is well rated (4.2 out of 5 for the concentrate, 4.5 for the isolate) and sweetened with stevia, but its concentrate contains only 70%…
Nutripure review: the cheapest in bulk, our price checks
Nutripure scores 4.7 out of 5 from 4,374 reviews, and our price checks of 23/10/2026 confirm it on price: in bulk, its Creapure creatine (5.99 EUR…
Nutrimuscle or Myprotein: whey from one, creatine from the other
For whey, Nutrimuscle: 41.23 EUR per kilo of protein in the 4 kg tub, 24% less than Myprotein’s Impact Whey even on promotion, with 80% protein…
Bioptimal review: bulk prices, and an origin that is often Asian
Bioptimal sells raw ingredients in large formats, and that is where it is unbeatable: organic soy protein in 3 kg at 22.20 EUR per kilo of…