Maybe if you had read the Constitution you wouldn't be spouting such crap. The power starts in the Preamble:
We the people of the United States, in order to form a more perfect union, establish justice, insure domestic tranquility, provide for the common defense, promote the general welfare and secure the blessings of liberty to ourselves and our posterity, do ordain and establish this Constitution for the United States of America.
Then there's Article 1, Section 1:
All legislative powers herein granted shall be vested in a Congress of the United States, which shall consist of a Senate and House of Representatives.
In other words, Congress has been granted the power to pass legislation of any kind, which includes regulating things.
Then there's Section 7:
Every bill which shall have passed the House of Representatives and the Senate, shall, before it become a law, be presented to the President of the United States; if he approve he shall sign it, but if not he shall return it, with his objections to that House in which it shall have originated, who shall enter the objections at large on their journal, and proceed to reconsider it.
Again, Congress passes legislation and the President approves or vetoes it. This includes regulating things.
Article 1, Section 8:
The Congress shall have power to lay and collect taxes, duties, imposts and excises, to pay the debts and provide for the common defense and general welfare of the United States; but all duties, imposts and excises shall be uniform throughout the United States;
The general welfare. In other words, the power to use taxes to inform people of the crap their ingesting or smoking to let them make an informed decision. It's also called regulation.
The last sentence of Section 8:
To make all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this Constitution in the government of the United States, or in any department or officer thereof.
Can you read and understand what those words mean? Congress has the power to make any law it deems necessary for any department to carry out its duties. That includes regulation.
Want more? I can keep going. There's an entire document I can go through to keep showing how you're ill-informed and just plain wrong.