Comparatifs
Des comparatifs chiffrés, au prix du gramme d'actif et non au prix du pot. Chaque valeur est relevée sur la page officielle de la marque, et datée.
Best slimming programme: 6 programmes compared, from the real price to the promises
Delivered meal programmes actually cost 278 to 609 EUR per month, for 1,200 to 1,550 kcal per day. Their promises of 5 to 6 kg in…
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 porridge oats: there is almost nothing to compare
Among 30 plain oat products, the differences are negligible: fibre from 8.7 to 11.5 g, protein from 10.8 to 15.4 g, sugars from 0 to 1.8…
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 compression boots: comfort, not proven recovery
Compression boots give a feeling of light legs, but two recent meta-analyses find only a small benefit, and one concludes they do not reduce soreness at…
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 almond butter: none of them add sugar
Among 49 products, sugars range from 1 to 4.2 g per 100 g, all naturally present in the almond: none adds sugar, oil or additives. The…
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 bottled water: 19 waters compared mineral by mineral
There is no best water for everyone: a low-mineral water such as Evian, Volvic or Thonon suits everyday drinking, and a water labelled for infants such…
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 water filter jug: the cartridge is what costs, and it removes minerals
A water filter jug mainly improves the taste of tap water by retaining chlorine. It does not make unsafe water safe, and Anses has noted that…
Best smart scale: 8 body composition scales compared, and what they really measure
Smart scales weigh accurately, to within 300 g in a hospital study, but are off by 2 to 4 kg on body fat: follow the trend,…
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 sugar-free chocolate: 14 of 16 bars use maltitol
Of 16 dark no-added-sugar bars, 14 replace the sugar with a polyol, maltitol in 13 cases. The calorie saving is small: 525 kcal per 100 g…
Best peanut butter: 63 products put under the microscope
Among 63 products, sugars range from 2.5 to 9 g per 100 g and salt from 0 to 1.08 g. As roasted peanuts already contain 4.25…
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…
Distance-learning BTS in dietetics: the 6 providers compared, from CNED to private schools
CNED is the cheapest full preparation, at 1,415 EUR per year in a public institution. Private schools charge 3,490 to 4,190 EUR for the full course.…