CoreAge Rx
Strong Suit
$39 single-month offer
30 servings before shipping/tax. Annual bundle $228 for 360 servings ($19/month equivalent); optional refills have separate terms. Checked September 27, 2026.
Read the full review →A little clarity before the scoop.
What’s in the jar. What the research says. How to ask the next useful question.
Compare six powdersUnderstand the numbers.
Keep the result in context.
Creatine and protein.
From label to shopping list
CoreAge Rx is first through sponsored placement. These are public offer comparisons, not clinical scores. Read the disclosure.
Strong Suit
$39 single-month offer
30 servings before shipping/tax. Annual bundle $228 for 360 servings ($19/month equivalent); optional refills have separate terms. Checked September 27, 2026.
Read the full review →Signature Spec Creatine
$42.99 one-time
Unflavored jar. Introductory subscription display $32.24; page says 10% off future deliveries. US free shipping threshold $99.
Read the full review →Klean Creatine
$34.50 displayed
Other ingredients: none. Product page asks users to log in to add to cart; final delivered amount was not established.
Read the full review →Micronized Creatine Powder
$20.49 displayed
Selected US unflavored 60-serving powder; tax excluded on the page. Other sizes and flavors have separate offers.
Read the full review →Regular Monohydrate / 500g
$23.97 catalog record
Unflavored regular powder. Final checkout not verified; separate Creapure and energy products differ.
Read the full review →Micronized Powder / 500g
$23.97 one-time displayed
Separate website maintenance text says about 7g; ask which directions apply. No automatic 100-day supply claim.
Read the full review →Recharge / Strawberry Lemonade
$44.99 one-time
A blend with calcium HMB and tart cherry. First subscription $31.49; future discount differs. Checked September 27, 2026.
Read the full review →The study desk
Six research abstracts. Each with a different question, population and set of limits.
Ingredient research does not establish a winner among the finished products reviewed here. No personal outcome is guaranteed.
Good places to begin
Understand who took part, what they did and how that differs from a promise about your own results.
Read the note →ResearchA two-year trial helps explain why a positive secondary finding cannot replace a negative primary outcome.
Read the note →BasicsA scoop of creatine is not a serving of protein, a meal replacement or a complete nutrition plan.
Read the note →ResearchWhat a 12-week direct trial found, what an older hormone study did not measure, and where the evidence stops.
Read the note →ResearchA diet-change study, the meaning of lower intake and the finished-product shell question.
Read the note →TrainingSeparate exercise outcomes, personal comfort and total caffeine without inventing a timing rule.
Read the note →BasicsCapsule burden, bovine gelatin, price denominators and the limits of a matching ingredient amount.
Read the note →ProductsThe current Strawberry Lemonade label, a conflicting older description, introductory subscription terms, and the unmatched unflavored Labdoor record.
Read the note →ResearchA 2024 experiment, its 2026 follow-up, and why laboratory task results do not establish safe driving or a personal supplement protocol.
Read the note →ResearchCompare a negative leg trial with a much smaller favorable arm study, without turning recovery marketing into a rehabilitation plan.
Read the note →ResearchTwo trials of creatine alongside rehabilitation measured function, pain and strength differently. Read the benefits and the unchanged outcomes together.
Read the note →ResearchWhat a small randomized trial found about muscle energy and strength, what it did not establish for symptoms, and why exact-product claims remain separate.
Read the note →