■ DMAE Dimethylaminoethanol, an analogue of choline, is important for proper brain and muscle function. Research shows that supplementing with DMAE increases choline levels in the brain better than using choline itself. Having higher choline levels increases acetylcholine, which is a critical neurotransmitter involved in brain processes and muscle contraction. Boosting this neurotransmitter results in better mental function, better focus and drive in the gym, better muscle endurance and strength, improved mood and a greater sense of well being.

■ Rhodiola rosea This root extract increases the body’s resistance modulating neurotransmitters dopamine, norepinephrine and serotonin. These are important for good mood, especially during the winter, when the amount of sunlight decreases. Rhodiola also improves performance in the gym, has been shown to increase the levels of betaendorphins that reduce pain and improve mood, and even helps to free up fat from fat cells, particularly during exercise.

■ Take It Like This Take 100-200 milligrams of DMAE once or twice per day and 100-500 mg of Rhodiola standardized to 3% rosavins and 1% salidrosides two to three times per day. Take both on an empty stomach.