Buying Guides
Health topics: start from the goal, not the product name
A supplement sales page is designed to be read on its own, where it has no competition and no context. These six guides put the products back next to each other and sort them by mechanism, which is the only way to tell apart a dozen formulas that all promise the same outcome. Each guide also says which symptoms in its category are a doctor's problem rather than a shopping decision.
Why group supplements by mechanism instead of by claim?
Because claims converge and mechanisms do not. Eleven blood sugar products all advertise healthy glucose levels, which tells you nothing about which to buy. But one of them blocks starch absorption in the gut, another makes insulin work better at the receptor, and a third suppresses sweet taste. Those are three different purchases with three different side effects, and the difference is visible on the label once you know what to look for. Grouping by mechanism turns an undifferentiated shelf into a short list.
The same logic runs through every guide here. Digestive products sort by where in the tract they act. Sleep products sort by which part of the night they address. Eye formulas sort by whether the carotenoid dose reaches the figure the research used. In each case the organising principle came out of the category rather than being imposed on it, which is why the six guides do not share a template.
The six guides
5 products
Eye Health
Lutein and zeaxanthin at the AREDS2 benchmark, what that trial actually tested, and why most eye formulas cite it for a use it never studied.
VisiFlora, iGenics, OcuPrime, Vision 20, Visivra
Open the Eye Health guide →10 products
Gut Health & Digestion
Sorted by where your symptoms start rather than by brand, because enzymes, bitters, fiber and bacteria act in different parts of the tract on different timescales.
Finessa, Abdomax, SynoGut, Viscera-3, VivoGut, LeanBiome and more
Open the Gut Health and Digestion guide →12 products
Blood Sugar Support
Four mechanism tiers, the Ceylon versus cassia question, and the medication interaction that makes this the riskiest category on the site to self-prescribe.
Phytomem One, Sugar Defender, CelluCare, GlucoFort, CarboFix and more
Open the Blood Sugar Support guide →15 products
Brain & Memory
Fifteen nootropics across five pathways, which ingredient is a prescription mechanism in disguise, and the reversible causes of fog that get missed first.
Phytomem One, NeuroThrive, Neurodrine, NeuroQ, Pineal Guardian and more
Open the Brain and Memory guide →6 products
Sleep Support
Matched to where your night breaks down, why most melatonin doses are ten times too high, and which magnesium forms are absorbed at all.
Yu Sleep, Renew, Resurge, Bioptimizers Magnesium and more
Open the Sleep Support guide →6 products
Immune Support
Five layers of defence, the lysine and arginine rationale stated accurately, and the interaction that matters if you take immunosuppressive therapy.
Herpafend, LungZen, Kerassentials, NanoDefense Pro, Liv Guard
Open the Immune Support guide →What we check on every product
Four things, consistently. Disclosed amounts, because an ingredient inside a proprietary blend with no milligram figure cannot be compared to anything. The dose against the research dose, where a research dose exists. Interactions with common prescriptions, which is the part sales pages omit most reliably. And the arithmetic on the offer, because advertised savings in this market are frequently wrong, and we publish the figures from the seller's own checkout even where they contradict the seller's own banner.
Three habits that make any supplement purchase better
- Work out cost per day at the dose on the directions, not cost per bottle. Two capsules twice daily turns a thirty-day bottle into fifteen days.
- Change one thing at a time. Starting a supplement, a diet and an exercise habit in the same week guarantees you will not know what worked.
- Write down the refund deadline the day the package arrives. The guarantee is administered by the payment platform, and the window starts at purchase rather than at the point you decide it is not working.
Questions about these guides
How are products chosen for these guides?
Every product in a topic guide already has a full review on this site, and the guide groups them by mechanism so they can be compared on something other than their own sales copy. Products are not included or excluded on the basis of commission rate. Several products in these guides pay us nothing, and some we assess unfavourably in the underlying review.
Do you earn money from these pages?
Yes, and the arrangement is worth stating plainly. When a reader buys through a link here, the merchant pays a commission that does not change the reader's price. That funds the site. It does not buy placement, and it does not change the figures we publish: where a seller's advertised savings do not match the arithmetic of their own checkout, we publish the arithmetic.
Why do some products have a dedicated page instead of a review?
The products we have examined in the most depth, usually because a label, a supplement facts panel and a pricing structure needed room to lay out properly, get a page of their own rather than a single entry in the review index. Those pages carry the full ingredient panel, dosing, the guarantee terms and current pricing. They are linked from the relevant topic guide above.
How often is this updated?
Pricing and bundle contents in this category change frequently and without notice, so topic guides deliberately avoid quoting prices and point to the product page instead, where the figure is checked and dated. Ingredient and mechanism information changes far more slowly. Each guide carries the month it was last reviewed.
What do ClickBank, BuyGoods and MaxWeb mean on a product?
They are the payment and fulfilment platforms the seller uses, and they matter for one practical reason: refunds. The guarantee is administered by the platform rather than by the brand, so the refund window and the process for using it are set by whichever of them handles the transaction. Knowing which one you bought through is what you need when you want your money back.
Is any of this medical advice?
No. These guides are written to help you read a label and ask a better question, not to replace a clinician. Each one includes the symptoms in its category that warrant assessment rather than a purchase, because in several of these areas the treatable causes are commonly missed and the cost of delay is real.
Looking for something not covered here?
These guides cover six categories. The full index runs to 112 reviews across weight management, men's and women's health, joint health, nerve health, dental, hair, hearing, prostate and cardiovascular support.
- Browse all 112 reviews, filterable by category and by payment platform
- Side-by-side comparisons of products within the same category
- Blog for ingredient explainers and pricing changes
- About and methodology for how reviews are researched and funded