Dietary supplements for consideration in elite female footballers

Figures & data

Figure 1. Supplement decision-making flow chart. Reprinted from the Sport and Exercise Nutrition Register (SENr), supplement use in sport position statement (Close et al., 2017)

Table 1. National Academy of Medicine (NAM) guidelines for the classification of Vitamin D status (adapted from Owens et al., 2018).

25[OH]D concentration (nmol.L^−1)	Classification
< 12	Severely deficient
12 ≤ 30	Deficient
30–50	Inadequate
> 50	Adequate
>75	Adequate for athletes (Owens et al., 2018)
> 180	Toxic

Figure 2. Pathways and physiological benefits of nitric oxide production. Note. The most established pathway is the endogenous production of NO through the oxidation of L-arginine facilitated by nitric oxide synthase. The most recently discovered, is the reduction of dietary nitrate to nitrite by anaerobic bacteria in the oral cavities, which is further reduced to NO. Reprinted from Jones (2014).

Close, L. G., Naylor, M., & Riach, I. (2017). The Sport and Exercise Nutrition Register (SENr) supplement use in sport position statement. http://www.senr.org.uk/wp-content/uploads/SENr-Statement-updated-January-2017.pdf.

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Owens, D. J., Allison, R., & Close, G. L. (2018). Vitamin D and the athlete: Current perspectives and new challenges. Sports Medicine, 48(1), 3–16.

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Jones, A. M. (2014). Dietary nitrate supplementation and exercise performance. Sports Medicine, 44(1), 35–45.

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