A nonlinear optical crystal of guanidinium tetrafluoroborate has a chemical formula of [C(NH.sub.2).sub.3]BF.sub.4 and a molecular weight of 146.89, belongs to the trigonal crystal system, has a space group of R3m; has lattice parameters of a=7.4634(10), b=7.4634(10), c=9.1216(19) (6), and Z=3; has an ultraviolet cutoff edge of 200 nm; and has a frequency-multiplication response that is 4-5 times that of the commercialized nonlinear optical crystal KDP. A hydrothermal method, a room-temperature solution method, an evaporation method or a solvothermal method is used to grow the crystal in a centimeter-scaled size. The crystal can produce frequency-doubling, frequency-tripling, frequency-quadrupling, frequency-quintupling or frequency-sextupling harmonic light output from the fundamental frequency light of 1064 nm generated by a Nd:YAG laser, and/or can produce ultraviolet and deep-ultraviolet frequency-multiplication light output below 200 nm.

A nonlinear optical crystal of guanidinium tetrafluoroborate has a chemical formula of [C(NH.sub.2).sub.3]BF.sub.4 and a molecular weight of 146.89, belongs to the trigonal crystal system, has a space group of R3m; has lattice parameters of a=7.4634(10), b=7.4634(10), c=9.1216(19) (6), and Z=3; has an ultraviolet cutoff edge of 200 nm; and has a frequency-multiplication response that is 4-5 times that of the commercialized nonlinear optical crystal KDP. A hydrothermal method, a room-temperature solution method, an evaporation method or a solvothermal method is used to grow the crystal in a centimeter-scaled size. The crystal can produce frequency-doubling, frequency-tripling, frequency-quadrupling, frequency-quintupling or frequency-sextupling harmonic light output from the fundamental frequency light of 1064 nm generated by a Nd:YAG laser, and/or can produce ultraviolet and deep-ultraviolet frequency-multiplication light output below 200 nm.

Methods of enhancing muscle growth in a human are disclosed. The method comprises administering to the human a pharmaceutically effective amount of a composition or supplement formulation comprising at least one constituent selected from the group consisting of a nitrate, a nitrite, and both. In some aspects, the composition further comprises at least one constituent amino acid.

Methods of enhancing muscle growth in a human are disclosed. The method comprises administering to the human a pharmaceutically effective amount of a composition or supplement formulation comprising at least one constituent selected from the group consisting of a nitrate, a nitrite, and both. In some aspects, the composition further comprises at least one constituent amino acid.

Solid supplement compositions are disclosed comprising at least one non-ester nitrate compound and at least one isolated amino acid compound. The at least one isolated amino acid compound is a separate compound than the at least one non-ester nitrate compound. The composition contains at least about 0.05625 mg nitrate ion (NO.sub.3.sup.).

Solid supplement compositions are disclosed comprising at least one non-ester nitrate compound and at least one isolated amino acid compound. The at least one isolated amino acid compound is a separate compound than the at least one non-ester nitrate compound. The composition contains at least about 0.05625 mg nitrate ion (NO.sub.3.sup.).

Solid supplement compositions are disclosed comprising at least one non-ester nitrate compound and at least one isolated amino acid compound. The at least one isolated amino acid compound is a separate compound than the at least one non-ester nitrate compound. The composition contains at least about 0.05625 mg nitrate ion (NO.sub.3.sup.).

Solid supplement compositions are disclosed comprising at least one non-ester nitrate compound and at least one isolated amino acid compound. The at least one isolated amino acid compound is a separate compound than the at least one non-ester nitrate compound. The composition contains at least about 0.05625 mg nitrate ion (NO.sub.3.sup.).

Solid supplement compositions are disclosed comprising at least one non-ester nitrate compound and at least one isolated amino acid compound. The at least one isolated amino acid compound is a separate compound than the at least one non-ester nitrate compound. The composition contains at least about 0.05625 mg nitrate ion (NO.sub.3.sup.).

Solid supplement compositions are disclosed comprising at least one non-ester nitrate compound and at least one isolated amino acid compound. The at least one isolated amino acid compound is a separate compound than the at least one non-ester nitrate compound. The composition contains at least about 0.05625 mg nitrate ion (NO.sub.3.sup.).