Table 3.

Prevalence and quantities of different forms of creatine included in creatine products that do not contain other functional ingredients (n = 123).

Form of Creatine	Overall Prevalence (%)	Prevalence in Undisclosed Quantity (%)	Prevalence in Listed Quantity (%)	Prevalence as stand-alone creatine ingredient (%)	Listed quantity (Mean ± SD) as a stand-alone creatine ingredient (mg)	Prevalence as part of a blend of different forms of creatine (%)	Price per gram of creatine when sold as stand-alone ingredient ($)
Creatine Monohydrate∗	85.4	4.9	80.5	74.0	4469 ± 1110	11.3	$ 0.12 ± 0.08 (n = 91)
Buffered or KreAlkalyn Creatine Monohydrate	7.3	0.8	6.5	6.5	1819 ± 764	0.8	$ 0.35 ± 0.20 (n = 8)
Di-Creatine Malate	2.4	2.4	0	0	N/A	2.4	N/A
Creatine Gluconate	0.8	0	0.8	0.8	3000	0	$ 0.17 (n = 1)
Creatine Anhydrous	1.6	0.8	0.8	0.8	3000	0.8	$ 0.22 (n = 1)
Magnesium creatine chelate	6.5	3.3	3.3	0.8	2500	5.6	$ 0.32 (n = 1)
Creatine Phosphate	0	0	0	0	N/A	0	N/A
Creatine alpha-ketoglutarate	5.7	1.6	8.1	0	N/A	5.6	N/A
Creatine Pyruvate	9.8	1.6	8.1	0	N/A	9.7	N/A
Creatine Citrate	2.4	1.6	0.8	0	N/A	2.4	N/A
Creatine Hydrochloride	8.9	0.8	8.1	2.4	917 ± 289	6.5	$ 0.55 ± 0.08 (n = 3)
Free acid creatine	0.8	0	0.8	0	N/A	0.8	N/A
Tri-Creatine Malate	1.6	0.8	0.8	0	N/A	1.6	N/A
Creatine Ethyl Ester	0.8	0.8	0	0	N/A	0.8	N/A
Creatine Nitrate	0	0	0	0	N/A	0	N/A
Creatine Ethyl Ester Malate	0	0	0	0	N/A	0	N/A
Creatinol-O-Phosphate	0.8	0.8	0	0.8	N/A	0	N/A

^∗Creapure®, micronized, and other types of creatine monohydrate.