Combine gelatin and cold water in small saucepan. Let stand 5 minutes until thick. Place over low heat, stirring constantly just until gelatin dissolves (it will be clear when dissolved), about 5 minutes. Remove from heat and cool slightly, but do not let it solidify.
Whip cream, sugar and vanilla until slightly thickened. While beating slowly, gradually add gelatin to whipped cream mixture. Whip at high speed until stiff.
Refrigerate if not using immediately (and refrigerate any leftovers).
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I am not a health professional and nutrition data is calculated programatically. Accuracy may vary with product selection, calculator accuracy, etc. Consult a professional for the best information.