Compositions and methods for enhancing brain function

1. A nutritional supplement composition for enhancing cognitive function, comprising:

huperzine A;

vinpocetine;

acetyl-L-carnitine; and

rhodiola;

in a ratio a:b:c:d respectively such that a as the huperzine A is between about 0.8 and 1.2, b as the vinpocetine is between about 80 and 120, c as the rhodiola is between about 1,600 and 2,400 and d as the acetyl-L-carnitine is between about 8,000 and 12,000 wherein the composition is formulated for oral administration such that huperzine A, vinpocetine, rhodiola , and acetyl-L-carnitine, together account for at least 80 wt % of a dosage unit of the nutritional supplement composition.

2. The nutritional supplement composition of claim 1 , comprising a vitamin B complex (e) in a ratio a:b:c:d:e with the huperzine A, vinpocetine, rhodiola , and acetyl-L-carnitine such that e as the Vitamin B complex is between about 700 and 1,200.

3. The nutritional supplement composition of claim 2 , wherein the vitamin B complex comprises vitamins B3, B5 and B6.

4. The nutritional supplement composition of claim 1 , comprising a green tea and guarana extract (f) in a ratio a:b:c:d:f with the huperzine A, vinpocetine, rhodiola , and acetyl-L-carnitine such that f as the green tea and guarana extract is between about 1,600 and 2,400.

5. The nutritional supplement composition of claim 1 , wherein the rhodiola comprises about 2 to 4 percent rosavins and 0.5 to 1.5 percent salidrosides.

6. The nutritional supplement composition of claim 1 , wherein the huperzine A, vinpoceine, rhodiola and acetyl-L-carnitine are in a weight ratio to each other such that the huperzine A is between about 0.9 and 1.1, the vinpocetine is between about 90 and 110, the rhodiola is between about 1,800 and 2,200, and the acetyl-L-carnitine is between about 9,000 and 10,000.

7. The nutritional supplement composition of claim 1 , wherein acetyl-L-carnitine is present in an amount from about 1,250 mg to 1,500 mg.

8. The nutritional supplement composition of claim 1 , wherein the vinpocetine is present in an amount from about 10 mg to 30 mg.

9. The nutritional supplement composition of claim 1 , wherein the rhodiola is present in an amount from about 250 mg to 350 mg.

10. The nutritional supplement composition of claim 1 , wherein the huperzine A is present in an amount from about 50 mcg to 200 mcg.

11. The nutritional supplement composition of claim 1 , wherein the green tea and guarana extract is present in an amount from about 250 mg to 350 mg.

12. The nutritional supplement composition of claim 1 , wherein the Vitamin B complex is present in amount from about 125 mg to 175 mg.

13. The nutritional supplement composition of claim 1 , wherein the composition is formulated with an enteric coating.

14. The nutritional supplement composition of claim 1 , further comprising an inactive ingredient selected from the group consisting of a carrier, a binder, an excipient, a dye, and combinations thereof.

15. A nutritional supplement composition for enhancing cognitive function, comprising:

huperzine A;

vinpocetine;

acetyl-L-carnitine;

rhodiola;

a vitamin B complex comprising vitamins B3, B5 and B6; and

a green tea and guarana extract;

in a ratio a:b:c:d:e:f respectively such that the a as huperzine A is between about 0.8 and 1.2, b as the vinpocetine is between about 80 and 120, c as the rhodiola is between about 1,600 and 2,400, d as the acetyl-L-carnitine is between about 8,000 and 12000, e as each of the Vitamins B3, B5 and B6 is between about 250 to 400 and f as the green tea and guarana extract is between about 1,600 and 2,400 wherein the composition is formulated for oral administration such that huperzine A, vinpocetine, rhodiola , and acetyl-L-carnitine, together account for at least 80 wt % of a dosage unit of the nutritional supplement composition.

16. The nutritional supplement composition of claim 15 , wherein the rhodiola comprises about 2 to 4 percent rosavins and 0.5 to 1.5 percent salidrosides.

17. The nutritional supplement composition of claim 15 , wherein the Vitamin B3 comprises Niacin and Niacinamide.

18. The nutritional supplement composition of claim 15 , wherein the Vitamin B5 comprises pantothenic acid as D-calcium pantothenate.

19. The nutritional supplement composition of claim 15 , wherein the huperzine A, vinpoceine, rhodiola and acetyl-L-carnitine are in a weight ratio to each other such that the huperzine A is between about 0.9 and 1.1, the vinpocetine is between about 90 and 110, the rhodiola is between about 1,800 and 2,200, and the acetyl-L-carnitine is between about 9,000 and 10,000.

20. The nutritional supplement composition of claim 15 , wherein the acetyl-L-carnitine is present in an amount from about 1250 mg to 1500 mg.

21. The nutritional supplement composition of claim 15 , wherein vinpocetine is present in an amount from about 10 mg to 30 mg.

22. The nutritional supplement composition of claim 15 , wherein the rhodiola is present in an amount from about 250 mg to 350 mg.

23. The nutritional supplement composition of claim 15 , wherein the huperzine A is present in an amount from about 50 mcg to 200 mcg.

24. The nutritional supplement composition of claim 15 , wherein the green tea and guarana extract is present in an amount from about 250 mg to 350 mg.

25. The nutritional supplement composition of claim 15 , wherein each of the vitamins B3, B5 and B6 is present in an amount from about 40 to 60 mg.

26. The nutritional supplement composition of claim 15 , wherein the composition is formulated with an enteric coating.

27. The nutritional supplement composition of claim 15 , further comprising an inactive ingredient selected from the group consisting of a carrier, a binder, an excipient, a dye, and combinations thereof.

28. A nutritional supplement composition for enhancing cognitive function, comprising:

huperzine A;

vinpocetine;

acetyl-L-carnitine;

rhodiola;

a vitamin B complex comprising vitamins B3, B5 and B6; and

a green tea and guarana extract;

wherein the composition is formulated for oral administration and the huperzine A is present in an amount from about 50 mcg to 200 mcg, the vinpocetine is present in an amount from about 10 mg to 30 mg, the rhodiola is present in an amount from about 250 mg to 350 mg, the acetyl-L-carnitine is present in an amount from about 1,250 mg to 1,500 mg, each of Vitamins B3, B5 and B6 are present in an amount from about 40 mg to 60 mg and the green tea and guarana extract is present in an amount from about 250 mg to 350 mg, and the huperzine A, acetyl-L-carnitine, vinpocetine and rhodiola together account for at least 80 wt % of a dosage unit of the composition.

29. The nutritional supplement composition of claim 28 , wherein the huperzine A, vinpocetine, rhodiola , acetyl-L-carnitine, each of the Vitamins B3, B5 and B6, and the green tea and guarana extract are in a ratio of a:b:c:d:e:f respectively such that a as the huperzine A is between about 0.8 and 1.2, b as the vinpocetine is between about 80 and 120, c as the rhodiola is between about 1600 and 2400, d as the acetyl-L-carnitine is between about 8,000 and 12,000, e as each of the Vitamins B3, B5 and B6 is between about 250 to 400 and f as the green tea and guarana extract is between about 1,600 and 2,400.

30. The nutritional supplement composition of claim 28 , wherein the huperzine A, vinpoceine, rhodiola and acetyl-L-carnitine are in a weight ratio to each other such that the huperzine A is between about 0.9 and about 1.1, the vinpocetine is between about 90 and about 110, the rhodiola is between about 1,800 and 2,200, and the acetyl-L-carnitine is between about 9,000 and 10,000.

31. The nutritional supplement composition of claim 28 , wherein the rhodiola comprises about 2 to 4 percent rosavins and 0.5 to 1.5 percent salidrosides.

32. The nutritional supplement composition of claim 28 , wherein the Vitamin B3 comprises Niacin and Niacinamide.

33. The nutritional supplement composition of claim 28 , wherein the Vitamin B5 comprises pantothenic acid as D-calcium pantothenate.