To speed up metabolism, several natural products and ingredients can be consumed or used. Some of these include:

1. Spicy foods: Chili peppers contain natural chemicals that can boost metabolism. Cooking foods with a tablespoon of chopped red or green chili pepper can increase calorie burning.

2. Protein-rich foods: Consuming more protein can help boost metabolism at mealtime. Good sources of protein include lean beef, turkey, fish, white meat chicken, tofu, nuts, beans, eggs, and low-fat dairy products.

3. Regular meals: Eating more frequently throughout the day can help increase metabolism.

4. Sleep and exercise: Regular exercise and proper sleep can also contribute to a faster metabolism.

5. Natural supplements: Some supplements, such as ketones, caffeine, green tea, bacopa, and evodiamine, have been reported to boost metabolism.

6. Certain foods: Foods like walnuts, milk, avocado, and Greek yogurt can help boost metabolism due to their protein and fiber content.

Remember that it is essential to maintain a balanced diet and engage in regular physical activity to effectively speed up metabolism. Consult with a healthcare professional before starting any new supplement or exercise regimen.