. 2021 Nov 4;6(4):93. doi: 10.3390/jfmk6040093

Table 4.

Plasma lactate (mmol/L) at rest with and without L-carnitine supplementation.

Authors	N 1	N 2	Carnitine Dosage	Mean 1	SD 1	Mean 2	SD 2	SMD	SE	95% CI	t	p	Weight (%)		Test for Heterogeneity
													Fixed	Random
Colombani 1996	7	7	4 g/d. 1 d	1.3	0.1	1.4	0.1	−0.936	0.531	−2.092 to 0.220			7.93	7.93	Q	8.0319
Chun 2011	6	6	2 g/d. 4 w	1.88	0.46	1.78	0.28	0.242	0.535	−0.950 to 1.434			7.80	7.80	DF	10
Chun 2011	6	6	3 g/d. 4 w	1.41	0.80	1.04	0.49	0.515	0.543	−0.695 to 1.725			7.57	7.57	Significance level	p = 0.6257
Chun 2011	6	6	4 g/d. 4 w	1.10	0.23	1.29	0.36	−0.580	0.546	−1.796 to 0.636			7.49	7.49	I² (inconsistency)	0.00%
Chun 2011	6	6	5 g/d. 4 w	1.38	0.57	1.50	0.79	−0.161	0.534	−1.350 to 1.029			7.83	7.83	95% CI for I²	0.00 to 50.67
Chun 2011	6	6	6 g/d. 4 w	1.38	0.47	1.31	0.25	0.172	0.534	−1.018 to 1.361			7.83	7.83
Greig 1987	9	9	2 g/d. 2 w	1.04	0.66	1.14	0.28	−0.188	0.450	−1.142 to 0.766			11.02	11.02
Greig 1987	10	10	2 g/d. 4 w	0.8	0.3	0.9	0.3	−0.319	0.431	−1.225 to 0.587			12.00	12.00
Oyono-Enguelle 1988	10	10	2 g/d. 4 w	0.93	0.35	0.86	0.34	0.194	0.429	−0.708 to 1.096			12.11	12.11
Watcher 2002	8	8	4 g/d. 12 w	0.9	0.1	0.8	0.2	0.598	0.484	−0.441 to 1.637			9.52	9.52
Wyss 1990	7	7	3 g/d. 1 w	1.5	0.7	1.4	0.7	0.134	0.501	−0.958 to 1.225			8.90	8.90
Total (fixed effects)	81	81						−0.0257	0.149	−0.321 to 0.269	−0.172	0.864	100.00	100.00
Total (random effects)	81	81						−0.0257	0.149	−0.321 to 0.269	−0.172	0.864	100.00	100.00
Chun 2011	6	6	2 g/d. 4 w	1.88	0.46	1.78	0.28	0.242	0.535	−0.950 to 1.434			24.44	24.44	Q	0.9555
Greig 1987	10	10	2 g/d. 4 w	0.8	0.3	0.9	0.3	−0.319	0.431	−1.225 to 0.587			37.62	37.62	DF	2
Oyono-Enguelle 1988	10	10	2 g/d. 4 w	0.93	0.35	0.86	0.34	0.194	0.429	−0.708 to 1.096			37.94	37.94	Significance level	p = 0.6202
Total (fixed effects)	26	26						0.0129	0.264	−0.518 to 0.544	0.0486	0.961	100.00	100.00	I²	0.00%
Total (random effects)	26	26						0.0129	0.264	−0.518 to 0.544	0.0486	0.961	100.00	100.00	95% CI for I²	0.00 to 92.98

Mm: Millimoles, l: liter, d: day; L-carn: L-carnitine, N: number of subjects, 1: subjects that did not use supplementation, 2: subjects used L-carnitine, g: grams, w: weeks, SMD: standard mean differences, SE: standard error, CI: confidential intervals, SD: standard deviation, I²: inconsistency.