Version field: translate the tube number accurately
Crystal Retinal 1, 3, 6, 10, 20 and 24 correspond to declared retinaldehyde amounts of 0.01%, 0.03%, 0.06%, 0.1%, 0.2% and 0.24%. A prominent version number is therefore not a direct percentage statement. The ingredient is retinaldehyde, also called retinal, rather than retinol or prescription tretinoin. Source 1
The retinoid terminology chapter helps preserve those names. A comparison should specify the exact version instead of treating every tube as one preparation. It should also avoid equating a percentage across different vitamin A forms or assuming the largest number is the appropriate choice for a particular person.
Study field: attach the group and duration to the product
The manufacturer describes a twelve-week study of 33 people using Crystal Retinal 6. Its reported appearance and firmness findings are distinct from participants’ statements that skin looked more youthful or that the serum felt gentle. We did not independently inspect the full methods, comparator or participant-level data. Source 1
This evidence should remain with version 6 and its stated time period. It does not automatically support identical percentages for the other versions. The separate ten-day image display also should not be merged with the twelve-week summary. Our indication-specific evidence chapter explains the broader importance of keeping a preparation and measured outcome connected.
Mechanism field: biochemical speed is not an outcome clock
The eleven-times-faster language cites biochemical conversion work, including a 1990 keratinocyte metabolism paper. That addresses a process involving vitamin A forms. It is not a direct measurement showing that a purchaser’s wrinkles improve eleven times faster with the finished serum than with another treatment. Source 1
A scientific reference can be relevant background without validating every interpretation of a headline. We have not used the multiple to predict a number of days to visible change, to shorten a prescribed course or to rank this cosmetic above tretinoin. The original endpoint and the proposed clinical outcome remain different questions.
Price field: the displayed control needs a selected version
The reviewed page showed $56 on its purchase control, as well as separate reward-points wording. The control is a displayed starting amount, not a verified delivered quote for every version. We did not establish the selected tube’s stock, taxes or delivery charges through checkout. Source 1
The distinction is especially relevant when the page also offers a stock-notification route. A visible amount does not prove the desired product is ready to ship. The cost chapter encourages retaining the actual quantity and payment conditions. Manufacturer estimates of uses per tube do not establish the calendar duration of a particular reader’s purchase.
Policy field: purchase date starts the US window
The US refund terms set a thirty-day period from purchase, require authorization and require at least half the product to remain. Kits have a condition that their components be returned together. These details make the offer narrower than an unrestricted thirty-day product trial beginning when a parcel is delivered. Source 2
Keep the date, seller and numbered version with the receipt. We did not request an authorization or verify a refund outcome. The policy describes eligibility conditions, while response speed and the result of a particular claim remain untested. An incomplete understanding of the clock can matter even when the product itself has been identified correctly.
Ingredient field: a broad fragrance phrase has limits
The published declaration includes botanical and scent-related constituents, including vanilla- and tonka-related ingredients and coumarin. No-artificial-fragrance wording is not the same as a guarantee that all such ingredients are absent. A person with a relevant history should check the actual current package and seek appropriate advice. Source 1
The label chapter explains why exact identity and complete information matter, without supplying a personal choice for this cosmetic. AAD retinoid guidance offers wider context for suitability. Neither that guidance nor the manufacturer’s comfort findings establish that every version will be comfortable for every user. Source 3
The completed reference note should therefore keep version, declared amount, relevant study, selected price and return deadline in separate fields. If one remains unresolved, label it as such. Combining the lowest price, highest concentration and most favorable study percentage from different parts of the range would describe an offer the reader has not actually verified.