(a).

Samples	Mg	Ba	Ca	K	Na	Al	Sr
NS	2505.52 ± 11.43	36.21 ± 1.08	478.35 ± 5.99	2496.26 ± 11.43	21.84 ± 0.22	126.71 ± 4.73	92.97 ± 0.81
LS	2516.46 ± 13.62	31.77 ± 4.99	497.27 ± 4.41	2464.39 ± 13.62	18.51 ± 0.32	131.90 ± 1.67	15.50 ± 0.68
BN	3460.00 ± 9.12	32.97 ± 3.30	1406.30 ± 3.04	3388.48 ± 9.12	36.31 ± 0.98	446.42 ± 5.16	53.89 ± 1.60
MD	5263.06 ± 9.49	28.61 ± 3.51	7341.51 ± 4.05∗∗∗	5219.54 ± 9.49	82.03 ± 1.10∗∗∗	2810.91 ± 7.08∗∗∗	82.12 ± 0.80
AC	10811.66 ± 13.13∗∗	18.41 ± 1.00	545.32 ± 7.96	10655.91 ± 9.13∗∗∗	25.78 ± 0.38	196.79 ± 4.13	169.51 ± 2.95∗∗∗
RDA	280–350 mg	1.1 mg	1000 mg	3.5 g	1.5 g	—	—
UL	350 mg	—	2500 mg	3000 mg	2300 mg	—	—

NS: Nigella sativa, LS: Lepidium sativum, BN: Brassica nigra, AC: Aloe camperi, and MD: Meriandra dianthera.

RDA: recommended daily dietary allowance per day for adults; UL: tolerable upper intake level per day for adults [12, 13].

Concentration values are expressed as mean ± SD (n = 3); ^∗∗∗ P < 0.001 and ^∗∗ P < 0.01 (statistical significance compared to all the other plants).