Best Creatine Supplements for Muscle Preservation in 2026

Creatine monohydrate has one of the most extensively studied safety profiles of any supplement. The ISSN position paper reviewed over 500 studies and found no clinically significant adverse effects at doses of 3–5g per day in healthy adults. Common concerns — kidney damage, hair loss, water retention — have not been confirmed in controlled research at standard doses. Note on water retention: creatine draws water into muscle cells (intracellular hydration), which may show as a small initial weight increase on the scale (typically 1–2 lbs in the first week). This is stored inside muscle, not subcutaneous fluid — it is not 'bloating' and generally resolves as the body adapts. This should be factored in when tracking weight-loss progress. People with pre-existing kidney disease should consult a nephrologist before supplementing. Creatine is excreted via the kidneys, and while it does not damage healthy kidneys, those with existing impairment should discuss with their physician. If you are taking prescription GLP-1 medications, there are no known interactions with creatine monohydrate, but always confirm with your prescribing physician before adding any supplement. **Pregnancy and breastfeeding:** Consult your healthcare provider before taking this supplement during pregnancy or while nursing. The safety of supplemental doses beyond dietary intake has not been established in pregnant or lactating women. **Blood thinners:** If you take blood-thinning medications (e.g., warfarin, apixaban, rivaroxaban, clopidogrel, or high-dose aspirin), consult your healthcare provider BEFORE starting this supplement, as it may have additive antiplatelet or anticoagulant effects. **Gout:** Individuals with gout should consult their healthcare provider before starting this supplement. Certain supplements (e.g., collagen, fish oil, niacin) may affect uric acid levels or trigger flares in susceptible individuals.