Guides
In the Scheunengut guide, we explain vitamins, minerals, plant compounds and dietary supplements clearly and with a solid scientific grounding – from correct intake to the right product for you. Use the search or the topic filters to quickly find what you need.
Buying Phenylalanine: How to Recognize the L- and DL-Form
Phenylalanine is the raw material your body uses to build tyrosine — and tyrosine, in turn, is the precursor of dopamine and norepinephrine. On the shelf, you’ll run into it...
B12 Lozenges: What Best-of Lists Miss
Price per lozenge and an average star rating — those are the two numbers behind most vitamin B12 best-of lists. Sounds like a solid basis for a decision. It isn’t:...
Best Caffeine Products: What Comparisons Miss
Coffee, green tea, or a capsule – the moment you actually try to compare caffeine sources, you run into dozens of “top pick” lists online. Here’s the truth: there’s no...
Buying Red Clover: The Quality Markers That Actually Matter
Red clover extract is no longer a niche product – and that's exactly why quality varies so much from one supplement to the next. Some labels tell you precisely how...
Best Vitamin B6 Supplements: What Lists Miss
You search for the best vitamin B6 supplement and land on a list with star ratings, colorful bars, and one product at the top wearing a green “#1” badge. What...
Best Spermidine Supplement: What Comparison Sites Miss
“Best spermidine supplement” — search that, and you’ll land on ranking pages full of stars, crowns, and seals. Here’s the honest answer up front: there’s no genuine, independent spermidine test...
Buying L-Tyrosine: Forms, Purity & What to Look For
You’ve probably heard of L-tyrosine — as a supplement for stressful stretches, long workdays, or those moments when your brain just won’t cooperate. The problem: shelves are packed with capsules,...
Best Red Yeast Rice: What Actually Matters When Buying
Search “best red yeast rice capsules” and you’ll pull up ten roundups full of star ratings, percentages, and buy buttons—almost none of which reveal the one number that actually matters...
Buying Vitamin B6: P5P vs. Pyridoxine HCl
Standing in front of the shelf or scrolling through a shop, you’ll see B6 supplements ranging from 2 mg to 50 mg, labeled either “pyridoxine” or “P5P.” That’s not fine...
Amino Acid Capsules: The 4 Criteria That Matter
Type “best amino acid capsules” into a search engine, and you'll get an instant ranking – sorted by star rating and price per capsule. Looks trustworthy, but it's only half...
Buying L-Lysine: What’s Really Inside
Every L-lysine label carries a number in milligrams – but not every number means the same thing. Whether you actually get as much lysine as you’re paying for comes down...
Buying Reishi: How to Spot Real Quality
On the shelf, Reishi products all look confusingly similar – bitter extract powder, flavorless capsules, and labels packed with jargon like “extract ratio” or “polysaccharides.” Yet the difference between a...
Buying L-Citrulline: Form, Purity & Lab Testing
“Citrulline” or “citrulline malate” — at first glance, they look like the same ingredient under two different names. They’re not, and that difference decides whether your money is well spent....
Buying Bromelain: How to Spot Real Quality
Bromelain capsules run anywhere from three to thirty euros — and price alone tells you almost nothing about quality. What matters is what's actually printed on the label: enzyme activity...
Buying Valerian: What Really Matters
People search “buy valerian” thousands of times a month — and still reach for the first bottle on the drugstore shelf. But not all valerian is created equal: there’s a...
Buying Passionflower: How to Spot Real Quality
Buying passionflower is easy – tea, capsules, and drops are just a click apart in any store. But the difference between a product that actually helps you wind down in...
Best L-Arginine: The 3 Numbers That Actually Matter
Search for “best L-arginine supplement” and you’ll get an instant ranking — first place, second place, third place, sorted by star rating and price per capsule. Handy, but incomplete: a...
Buying L-Tryptophan: Spot Real Purity & Quality
At first glance, every L-tryptophan capsule looks the same: white powder, a milligram number on the label. The real difference sits elsewhere — in the purity of the raw material,...
Dandelion Root: How to Recognize Good Quality
Dandelion root comes as tea, powder, tincture, roasted coffee substitute, or capsules – and the differences between these products are bigger than they look at first glance. A label that...
Buying Thyme: How to Spot Real Quality
Search “buy thyme” and you’ll mostly find garden centers selling potted herbs — no help at all if what you’re actually after is an extract, oil, or capsules. This aromatic...
Buying Fenugreek: How to Spot Genuine Quality
Fenugreek comes as whole seeds, powder, flavor-neutral capsules, and “activated” extract – and every brand claims theirs is the right choice for you. That’s confusing at first, because these differences...
Best D3+K2 Supplements: What Really Matters
When it comes to supplements, “best in test” is often just a label a comparison site gives itself — there’s no genuine, independent seal of approval for vitamin D3+K2 capsules....
Buying L-Arginine: Form, Purity & the Right Dosage
L-arginine is one of the best-selling amino acids in the sports and supplement world — and that's exactly why the market is so confusing: base or HCl, powder or capsules,...
Nahrungsergänzung: Warum du nichts merkst
Du nimmst es seit drei Wochen. Brav, jeden Tag, genau wie auf der Dose steht. Und du merkst: nichts. Bevor du das Produkt in die hinterste Ecke der Schublade schiebst...
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