Table 4.

Fat-soluble Vitamin deficiency and toxic levels^a.

	Measured levels	Deficiency limit	Toxicity limit
Vitamin A	Plasma retinol (mmol/L)	<1	>3
Vitamin D	25OH vitamin D (ng/ml)	<14	>80
Vitamin E	Alpha tocoferol (mmol/L)	<23	>80
Vitamin K	INR	>1.3	–

^aFrom Yu-Mei Shen et al³⁰²