Dr. Anthony Galea is facing four charges in his country related to the drug known as Actovegin, which is extracted from calf’s blood and used for healing.

Galea is known for using a blood-spinning technique - platelet-rich plasma therapy - designed to speed recovery. Besides Reyes, he also has treated Tiger Woods and several other professional athletes.

“They just asked me basically how I met the guy and stuff like that and what he put in my body,’’ Reyes said. “I explained to them what he [was] doing . . . I don’t worry about anything. I didn’t do anything wrong.’’

SI.com reported Saturday night that federal officials have told several athletes to expect grand jury subpoenas in the case. The website cited three anonymous sources familiar with the investigation.

The New York Times reported in December, citing anonymous sources, that the FBI opened an investigation into Galea based in part on medical records found on his computer relating to several professional athletes.

Reyes said he met with investigators from the FBI for about 45 minutes at the Mets’ spring training facility in Port St. Lucie, Fla., after they contacted him Thursday morning.

Reyes, who missed much of last season with right leg problems, said he spent five days in Toronto in September and was treated by Galea three times during the stay. The shortstop was asked by investigators if he used HGH.

“They asked me if he injected me with that. I say, ‘No,’ ’’ Reyes said. “What we do there, basically, he took my blood out, put it in some machines, spin it out, and put it back in my leg. So I explained that to them.’’

Galea was arrested Oct. 15 after a search warrant was executed at the Institute of Sports Medicine Health and Wellness Centre near Toronto. He is charged with selling Actovegin, conspiracy to import an unapproved drug, conspiracy to export a drug and smuggling goods into Canada.