MemoryFuel Safety and Side Effects: Tolerability, Kidney Tests and Interactions
Creatine is one of the most studied supplements available, and the rest of the scoop is ordinary nutrients. Here is the realistic list of side effects, the lab result that worries people, and the medicines that need spacing.
The short answer
For healthy adults, MemoryFuel's ingredients have a good safety record at these doses. Creatine monohydrate has been studied for decades, including long-term use, and the International Society of Sports Nutrition considers it safe for healthy people well above 5 g a day.[1] The other four actives are ordinary nutrients kept below their upper limits. The real issues are a handful of predictable, mostly mild effects, one lab-test quirk and a few medicine interactions.
Common, mild effects
| Effect | Cause | How common | What helps |
|---|---|---|---|
| Water weight of 1 to 2 lb | Creatine draws water into muscle | Common in the first weeks | Nothing; it stabilizes |
| Bloating | Creatine, especially undissolved | Occasional | Dissolve fully; take with food |
| Loose stools | Magnesium 300 mg plus creatine | Occasional | Take with a meal; drop other magnesium |
| Mild nausea | Empty stomach | Uncommon | Take after eating |
| Aftertaste | Stevia | Depends on taste | Mix into juice or a smoothie |
Kidneys and the creatinine test
Creatine breaks down into creatinine, the molecule labs use to estimate kidney function (eGFR). Regular users can therefore show a higher creatinine and a lower calculated eGFR without any kidney damage; a published case describes exactly this misreading.[4] Studies in healthy athletes over months to years found no impairment of kidney function.[3][2] The practical rule: tell your clinician you take creatine before blood work, and if you already have kidney disease, do not start without your nephrologist. Magnesium is also cleared by the kidneys, which adds a second reason for caution in kidney failure.[6]
Medicine interactions to check
| Medicine | Ingredient involved | Issue | Usual approach |
|---|---|---|---|
| Tetracyclines, quinolones | Magnesium | Binds the antibiotic, lowering absorption | Separate by several hours |
| Bisphosphonates (alendronate) | Magnesium | Reduced absorption | Separate as directed |
| Thiazide diuretics | Vitamin D3 | Raised calcium risk with high vitamin D | Pharmacist review |
| Metformin, acid blockers | Vitamin B12 | These lower B12; the scoop helps | Ask about B12 testing |
| NSAIDs daily, nephrotoxic drugs | Creatine | Kidney strain plus creatinine artifact | Doctor review first |
| Other creatine or magnesium products | Duplicates | Doses add up | Use one source |
Sources: NIH Office of Dietary Supplements fact sheets for magnesium, vitamin D and vitamin B12; metformin data from the Diabetes Prevention Program Outcomes Study.[6][7][8][11]
Myths that do not hold up
Hair loss. Traced to one small study in which a hormone, DHT, rose during creatine loading in rugby players. Hair was not measured and the finding has not been replicated.[5][2] Dehydration and cramps. Controlled studies do not support them.[2] "Creatine is a steroid." It is not; it is an amino-acid derivative found in meat.
Choline: odor and TMAO
Very high choline intakes, in the gram range, can cause a fishy body odor, sweating and low blood pressure; the adult upper limit is 3,500 mg, far above one scoop.[9] Gut bacteria convert choline into TMAO, which research has linked to platelet reactivity.[10] At this modest dose the practical risk is small, but people with heart disease who already avoid choline supplements may prefer food sources.
Who should avoid it or ask first
- Anyone with kidney disease or a kidney transplant
- Pregnant or breastfeeding women and under-18s (the label's own exclusion)
- People with bipolar disorder (a few case reports of mania with creatine)
- People on several prescriptions, until a pharmacist has checked the magnesium spacing
- Anyone with worsening memory, who needs a medical evaluation first
If something goes wrong
Stop the powder and contact your clinician for any serious reaction. You can report a suspected adverse event from a dietary supplement to the FDA through its safety reporting portal, and tell the maker at [email protected].[12][13]
Questions readers send about this
Is MemoryFuel safe for seniors?
For older adults with normal kidney function, the ingredients are generally well tolerated at these doses. Check medicines with a pharmacist, especially antibiotics, osteoporosis drugs and diuretics.
Does MemoryFuel raise blood pressure?
No ingredient is known to raise blood pressure at these doses, and there is no caffeine. Very high choline doses can lower it; one scoop is far below that range.
Can MemoryFuel cause insomnia?
Unlikely. It contains no stimulants. Magnesium glycinate is often taken in the evening for relaxation.
Sources behind this page
Every link opens the original abstract or agency page. Most trials gave creatine or a single nutrient on its own, often at other doses; none tested the MemoryFuel blend.
- 1Kreider RB, Kalman DS, Antonio J, et al. International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine. J Int Soc Sports Nutr. 2017;14:18. pubmed.ncbi.nlm.nih.gov/28615996/
- 2Antonio J, Candow DG, Forbes SC, et al. Common questions and misconceptions about creatine supplementation: what does the scientific evidence really show? J Int Soc Sports Nutr. 2021;18(1):13. pubmed.ncbi.nlm.nih.gov/33557850/
- 3Poortmans JR, Francaux M. Long-term oral creatine supplementation does not impair renal function in healthy athletes. Med Sci Sports Exerc. 1999;31(8):1108-1110. pubmed.ncbi.nlm.nih.gov/10449011/
- 4Williamson L, New D. How the use of creatine supplements can elevate serum creatinine in the absence of underlying kidney pathology. BMJ Case Rep. 2014;2014:bcr2014204754. pubmed.ncbi.nlm.nih.gov/25239988/
- 5van der Merwe J, Brooks NE, Myburgh KH. Three weeks of creatine monohydrate supplementation affects dihydrotestosterone to testosterone ratio in college-aged rugby players. Clin J Sport Med. 2009;19(5):399-404. pubmed.ncbi.nlm.nih.gov/19741313/
- 6NIH Office of Dietary Supplements. Magnesium: Fact Sheet for Health Professionals. ods.od.nih.gov/factsheets/Magnesium-HealthProfessional/
- 7NIH Office of Dietary Supplements. Vitamin D: Fact Sheet for Health Professionals. ods.od.nih.gov/factsheets/VitaminD-HealthProfessional/
- 8NIH Office of Dietary Supplements. Vitamin B12: Fact Sheet for Health Professionals. ods.od.nih.gov/factsheets/VitaminB12-HealthProfessional/
- 9NIH Office of Dietary Supplements. Choline: Fact Sheet for Health Professionals. ods.od.nih.gov/factsheets/Choline-HealthProfessional/
- 10Zhu W, Gregory JC, Org E, et al. Gut microbial metabolite TMAO enhances platelet hyperreactivity and thrombosis risk. Cell. 2016;165(1):111-124. pubmed.ncbi.nlm.nih.gov/26972052/
- 11Aroda VR, Edelstein SL, Goldberg RB, et al. Long-term metformin use and vitamin B12 deficiency in the Diabetes Prevention Program Outcomes Study. J Clin Endocrinol Metab. 2016;101(4):1754-1761. pubmed.ncbi.nlm.nih.gov/26900641/
- 12U.S. Food and Drug Administration. Questions and Answers on Dietary Supplements. www.fda.gov/food/information-consumers-using-dietary-supplements/questions-and-answers-dietary-supplements
- 13National Center for Complementary and Integrative Health. Using Dietary Supplements Wisely. www.nccih.nih.gov/health/using-dietary-supplements-wisely
Run a fair 90-day MemoryFuel trial
Checkout happens on the maker's ClickBank page. Mix one scoop a day exactly as printed, write down a simple recall score on day one, keep the receipt email, and if nothing has moved by about day 75, email the helpdesk while the 90-day window is still open.