These are excellent for focus and energy.
They also clear my sinuses quite well!
Niacin / Vitamin B3
Green Tea Leaf Extract
Great article on green tea & weight loss by Dr Mercola here
Epigallocatechin gallate (EGCG), the active component of green tea, is again on the radar as a potential weight loss aid. The authors of this randomized, placebo-controlled, double-blind crossover trial state:
“This pilot study provides for the first time evidence that a single green tea catechin, EGCG, can increase fat oxidation in obese men, at least within 2 h after meal intake.”
Bitter Orange Peel (which contains synephrine)
In general, bitter orange extract alone (p-synephrine) or in combination with other herbal ingredients did not produce significant adverse events as an increase in heart rate or blood pressure, or alter electrocardiographic data, serum chemistry, blood cell counts or urinalysis. p-Synephrine alone as well as in combination products were shown to increase resting metabolic rate and energy expenditure, and modest increases in weight loss were observed with bitter orange extract/p-synephrine-containing products when given for six to 12 weeks.
“High caffeine intake was associated with weight loss through thermogenesis and fat oxidation”
“The detected effects of tyrosine include an overall increase in pulse pressure
(LBNP typically reduces pulse pressure) and an increase in auditory event related potential amplitude (P300-N300), an electrophysiological
correlate of attention which may indicate enhanced cognitive activation.”
In conclusion, choline supplementation could rapidly reduce body mass without any side effects on biochemical levels or static strength.
“A-GPC is effective at increasing lower body force production after 6 days of supplementation. Sport performance coaches can consider adding A-GPC to the diet of speed and power athletes to enhance muscle performance.”
Black Pepper / Piperine
The above results suggest that piperine possesses potential fat reducing and lipid lowering effects, without any change in food appetite, at a small dose of 40 mg / kg.
As you can see by the quotes & links above, there’s a lot of research behind this product too.
Like any product/ingredient, there are a few studies which contradict some of those quoted above, but generally, the product is very robust from a scientific perspective.
Consult a doctor first if you have high blood pressure or any cardiovascular problems.