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Iron-Rich Foods: The Ranking That Really Matters (Absorption Included)
All rankings of iron-rich foods lie a bit: they count milligrams, not what the intestines actually absorb, and the gap ranges from 2% to 35%. The ranking redone by actually absorbed iron, the two t...
The same iron capsule can be absorbed at 20% or 5% depending on the time, stomach contents, and what follows within the hour. Morning or evening, on an empty stomach or with meals, every day or eve...
Low Ferritin: Symptoms, Thresholds to Know, and How to Raise It
Ferritin at 18, 25 or 38 and "it's within normal range"? Not necessarily. Laboratory ranges often start at a value that corresponds to an iron-depleted bone marrow. The thresholds validated by the ...
Iron Deficiency: Symptoms, Ferritin, Causes and How to Fix It (The Complete 2026 Guide)
Persistent fatigue, hair loss, restless legs, shortness of breath: iron deficiency affects one in five menstruating women and often hides behind a "normal" blood test. The three stages of deficienc...
Migraine: The 3 Nutrients Proven by Science
The Nutrition•pro team • Updated in August 2026 • 12 verified scientific sources • Our methodology When looking for what to do about migraines, you encounter two extremes. On one side, lists o...
Vitamin B2 (Riboflavin): Benefits, Migraine, Foods, Deficiency and Dosage (Complete 2026 Guide)
The most discreet B vitamin and the one with the most health claims. And especially the only one for which a precise dose (400 mg) appears in migraine prevention recommendations, with a number need...
Vitamin B3 (Niacin, Niacinamide): Benefits, Skin, Risks and Dosage (The Complete 2026 Guide)
One vitamin, two molecules, two safety limits that differ by a factor of ninety. What niacinamide really does for skin, and why niacin left prescriptions behind.
Vitamin B1 (Thiamine): Benefits, Foods, Deficiency, B1-B6 and Dosage (The Complete 2026 Guide)
The only vitamin whose requirement depends on what you eat, and whose reserves last only three weeks. What it does, who lacks it, and why every alcohol withdrawal begins with it.
Vitamin B6 (Pyridoxine): Benefits, Foods, Deficiency, Overdose and Dosage (The Complete 2026 Guide)
Pyridoxine, P-5-P: what vitamin B6 does, where to find it, who risks deficiency, when it damages nerves, and how to choose a supplement without exceeding the 12 mg limit.
Folic Acid (Vitamin B9): Role, Pregnancy, Foods, Deficiency and Dosage (The Complete 2026 Guide)
Folates, folic acid, methylfolate: what vitamin B9 really does, how much to take, when to start before pregnancy, who is at risk of deficiency, and which form to choose.
Vitamin B12: Role, Foods, Deficiency, Dosage and Forms (The Complete 2026 Guide)
What is vitamin B12 used for, where to find it, how to identify a deficiency and what dose to take based on your profile: the complete guide, backed by scientific sources.
B Vitamins: Everything Science Proves (and Debunks) in 2026
Eight vitamins, just as many commercial promises. Nine meta-analyses to settle the matter: what is proven, what is not, and why the form matters as much as the dose.
Magnesium: Everything Science Proves (and Debunks) in 2026
Anti-stress, anti-cramps, anti-fatigue: of the three promises driving the magnesium market, two don't hold up to scrutiny. Twelve meta-analyses reviewed.
The Most Common Deficiencies: Symptoms and Solutions
Iron, magnesium, vitamin D, vitamin C, B12: the most common deficiencies, their symptoms and solutions. Take our informative self-test.
Red Ginseng: Proven Benefits, Ginsenosides, Dosage and Precautions (The Complete Guide)
Red Ginseng (Panax ginseng): what research says about energy, fatigue, mental performance and libido, the role of ginsenosides, capsules or powder, dosage and precautions.
Shilajit and Women's Health: What Are the Benefits for Women?
Shilajit for Women: What Science Shows (Bones and Menopause, Energy, Antioxidant) and What You Shouldn't Claim. An Honest and Sourced Overview.
Red or White Ginseng: Which Should You Choose?
Ginseng rouge ou blanc : quelle différence, lequel est le plus concentré et lequel choisir selon votre objectif ? Le guide clair, poudre ou gélules comprises.
Ginseng and Fatigue: A Real Energy Boost?
Le ginseng aide-t-il vraiment contre la fatigue ? Ce que disent les méta-analyses sur l'énergie, ses limites sur la performance, et comment l'utiliser.
Ginseng: Benefits, Types, Dosage and Precautions (The Complete Guide)
Ginseng (Panax) : ce que disent vraiment les études sur l'énergie, la cognition, la libido et la glycémie, ginseng rouge ou blanc, posologie et précautions.
Guarana and Weight Loss: Myth or Reality?
Does guarana make you lose weight? The scientific truth: the real role of caffeine, what EFSA did not validate, dosage, 6-in-1 formula and caffeine precautions.
Études indépendantes
Ce que dit la science sur les compléments alimentaires, les régimes et le déficit calorique
Nous avons épluché la littérature scientifique pour apporter de vraies réponses sur ces sujets saturés de promesses. L'objectif est simple : offrir une vision objective, chiffrée et vérifiable, plutôt que des certitudes marketing.
- 01 Shilajit in France in 2026: Price, Transparency and Demand, the First Market StudyFirst French market study on shilajit: 1.8 million searches analyzed, price benchmark across 13 brands, and transparency audit of certificates of analysis. Data collected August 2026.
- 02 Semaglutide (Ozempic, Wegovy) vs Glucomannan (Konjac): A Scientific ComparisonRigorous comparison between semaglutide (Ozempic, Wegovy) and glucomannan (Konjac): efficacy, safety, cost, sustainability. Two tools for two audiences: medication for confirmed obesity, supplement to help maintain an ordinary caloric deficit.
- 03 Top 10 Dietary Supplements for Weight Loss: Summary of 18 Meta-AnalysesObjective ranking of 10 dietary supplements for weight loss based on 18 meta-analyses. Net effect vs placebo, GRADE evidence level, tolerance and overall score. Glucomannan, green tea and caffeine rank at the top.
- 04 How Much Does Each Diet Cost? Comparative Analysis of 14 Popular DietsEconomic analysis of 14 dietary regimens in France: weekly cost, annual cost increase, and cost per kilogram lost. Based on average prices from major retailers and cross-referenced with efficacy measured in scientific literature.
- 05 Meta-analysis of 14 Diets: Synthesis of 12 Major Meta-analysesComparative synthesis of 14 popular diets (Mediterranean, ketogenic, DASH, Dukan, low-carb, intermittent fasting...) based on 12 meta-analyses published between 2010 and 2024. Weight loss, metabolic markers, dropout rates, and long-term benefits, compared objectively.
- 06 Weight Loss Supplements vs Calorie Deficit: How Many Calories Do You Need to Burn to Lose a Kilogram?Rigorous comparison of the effectiveness of simple caloric deficit versus the most popular weight loss supplements, based on scientific literature. Synthesis of 10 meta-analyses and kinetic modeling by the NIH.
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