Heart Attack
L-Carnitine
Taking L-carnitine may help reduce damage and complications following a heart attack.Dose:
2 grams dailyL-CarnitineL-carnitine is an amino acid important for transporting fats that can be turned into energy in the heart. Clinical trials have reported that taking L-carnitine (4–6 grams per day) increases the chance of surviving a heart attack.1,2,3 In one double-blind trial, individuals with suspected heart attack were given 2 grams of L-carnitine per day for 28 days.4 At the completion of this study, infarct size, as well as the number of nonfatal heart attacks, was lower in the group receiving L-carnitine versus the placebo group. Double-blind research using L-carnitine intravenously also shows promise.5Fish Oil
Supplementing with fish oil may reduce the chances of having another heart attack.Dose:
850 to, 1700 mg omega-3 fatty acidsFish OilFish oil contains the beneficial omega-3 fatty acids EPA and DHA, which have led to partial reversal of atherosclerosis in a double-blind trial.6 In another double-blind trial, individuals were given either fish oil (containing about 1 gram of EPA and 2/3 gram of DHA) or mustard oil (containing about 3 grams alpha linolenic acid, another omega-3 fatty acid) 18 hours after a heart attack. Both groups experienced fewer nonfatal heart attacks compared to a placebo group, while the fish oil group also experienced fewer fatal heart attacks.7 The largest published study on omega-3 fatty acids for heart attack prevention was the preliminary GISSI Prevenzione Trial,8 which reported that 850 mg of omega-3 fatty acids from fish oil per day for 3.5 years resulted in a 20% reduction in total mortality and a 45% decrease in sudden death. Other investigators suggest that fish oil reduces the amount of heart muscle damage from a heart attack and enhances the effect of blood-thinning medication.9 People wishing to supplement with fish oil should take fish oil supplements that include at least small amounts of vitamin E, which may protect this fragile oil against free radical damage.10Folic Acid
Taking folic acid may reduce blood levels of homocysteine. High homocysteine levels have been linked to an increased heart attack risk.Dose:
500 to 800 mcg dailyFolic AcidHigh blood levels of the amino acid homocysteine have been linked to an increased risk of heart attack in most,11,12,13,14 though not all,15,16 studies. A blood test screening for levels of homocysteine, followed by supplementation with 400 mcg of folic acid and 500 mcg of vitamin B12 per day could prevent a significant number of heart attacks, according to one analysis.17Folic acid18,19 and vitamins B6 and B12 are known to lower homocysteine.20
There is a clear association between low blood levels of folate and increased risk of heart attacks in men.21 Based on the available research, some doctors recommend 50 mg of vitamin B6, 100–300 mcg of vitamin B12, and 500–800 mcg of folic acid per day for people at high risk of heart attack.
Magnesium Intravenous
Magnesium given intravenously after a heart attack has been shown to decrease death and complications from heart attacks.Dose:
Consult a qualified healthcare practitionerMagnesium IntravenousBlood levels of magnesium are lower in people who have a history of heart attack.22 Most trials have successfully used intravenous magnesium right after a heart attack occurs to decrease death and complications from heart attacks.23 By far the largest trial did not find magnesium to be effective.24 However, other researchers have argued that delaying the initial infusion of magnesium and administering the magnesium for too short a period may have caused this negative result.25 People with a history of heart attack or who are at risk should consult with their cardiologist about the possible use of immediate intravenous magnesium should they ever suffer another heart attack.
N-Acetyl Cysteine
In one study, NAC injections decreased the amount of tissue damage in people who had suffered a heart attack.Dose:
Consult a qualified healthcare practitionerN-Acetyl CysteineIn one study, intravenous injections of NAC (N-acetyl cysteine) decreased the amount of tissue damage in people who had suffered a heart attack.[REF] Whether oral NAC would have the same effect is unknown.Red Yeast Rice
In one trial that included patients with a previous history of a heart attack, supplementing with a particular brand of Chinese red yeast rice that contained 6 mg per day of lovastatin (a statin drug) reduced risk of death from heart disease.Dose:
300 mg twice a day (with doctor supervision)Red Yeast RiceIn a double-blind trial that included patients with a previous history of a heart attack, supplementation with a particular brand of Chinese red yeast rice (Xuezhikang) in the amount of 300 mg twice a day for an average of 4.5 years reduced the death rate from heart disease by about one-third, compared with a placebo.26Xuezhikang is grown by a method that increases its content of lovastatin (a statin drug), and patients in this study received about 6 mg per day of lovastatin from taking Xuezhikang. It is not known whether other red yeast rice products would produce similar benefits.Selenium
Some doctors recommend that people at risk for a heart attack supplement with selenium.Dose:
100 to 200 mcg dailySeleniumThe relation between selenium and protection from heart attacks remains uncertain. Low blood levels of selenium have been reported in people immediately following a heart attack,27 suggesting that heart attacks may increase the need for selenium. However, other researchers claim that low selenium levels are present in people before they have a heart attack, suggesting that the lack of selenium might increase heart attack risk.28 One report found that low blood levels of selenium increased the risk of heart attack only in smokers,29 and another found the link only in former smokers.30 Yet others have found no link between low blood levels of selenium and heart attack risk whatsoever.31 In a double-blind trial, individuals who already had one heart attack were given 100 mcg of selenium per day or placebo for six months.32 At the end of the trial, there were four deaths from heart disease in the placebo group but none in the selenium group (although the numbers were too small for this difference to be statistically significant). In other controlled research, a similar group was given placebo or 500 mcg of selenium six hours or less after a heart attack followed by an ongoing regimen of 100 mcg of selenium plus 100 mg of coenzyme Q10 per day.33 One year later, six people had died from a repeat heart attack in the placebo group, compared with no heart attack deaths in the supplement group. Despite the lack of consistency in published research, some doctors recommend that people at risk for a heart attack supplement with selenium—most commonly 200 mcg per day.Vitamin E
Supplementing with vitamin E, synthetic or natural, may help reduce heart attack risk.Dose:
400 to 800 IU dailyVitamin E
Several studies[REF][REF] including two double-blind trials[REF][REF] have reported that 400 to 800 IU of natural vitamin E reduces the risk of heart attacks. However, other recent double-blind trials have found either limited benefit,[REF] or no benefit at all from supplementation with synthetic vitamin E.[REF] One of the negative trials used 400 IU of natural vitamin E[REF]—a similar amount and form to previous successful trials. In attempting to make sense of these inconsistent findings the following is clear: less than 400 IU of synthetic vitamin E, even when taken for years, does not protect against heart disease. Whether 400 to 800 IU of natural vitamin E is or is not protective remains unclear.Taking antioxidant supplements may improve the outcome for people who have already had a heart attack. In one double-blind trial, people were given 50,000 IU of vitamin A per day, 1,000 mg of vitamin C per day, 600 IU of vitamin E per day, and approximately 41,500 IU of beta-carotene per day or placebo.34 After 28 days, the infarct size of those receiving antioxidants was significantly smaller than the infarct size of the placebo group.
Astragalus
Preliminary clinical trials in China suggest that astragalus may be beneficial for people after they have suffered a heart attack.Dose:
Refer to label instructionsAstragalusPreliminary clinical trials in China suggest that astragalus may be of benefit in people after they have suffered a heart attack.35,36 These studies did not attempt to show any survival or symptom reduction benefit. Therefore, further research is needed to determine whether astragaslus would be of benefit to people with heart attacks or angina.Beta-Carotene
Supplementing with beta-carotene may reduce the likelihood of a heart attack and may improve the outcome for people who have already had a heart attack.Dose:
Refer to label instructionsBeta-CaroteneCaution: Synthetic beta-carotene has been linked to increased risk of lung cancer in smokers. Until more is known, smokers should avoid all beta-carotene supplements.
Blood levels of the antioxidant nutrients vitamins A, C, and E, and beta-carotene are reported to be lower in people with a history of heart attack, compared with healthy individuals.37 The number of free radical molecules is also higher, suggesting a need for antioxidants. Streptokinase, a drug therapy commonly used immediately following a heart attack, enhances the need for antioxidants.38
Taking antioxidant supplements may improve the outcome for people who have already had a heart attack. In one double-blind trial, people were given 50,000 IU of vitamin A per day, 1,000 mg of vitamin C per day, 600 IU of vitamin E per day, and approximately 41,500 IU of beta-carotene per day or placebo.39 After 28 days, the infarct size of those receiving antioxidants was significantly smaller than the infarct size of the placebo group.
Low levels of beta-carotene in fatty tissue have been linked to an increased incidence of heart attacks, particularly among smokers.40 One population study found that eating a diet high in beta-carotene is associated with a lower rate of nonfatal heart attacks.41 However, beta-carotene supplementation may not offer the same protection provided by foods that contain beta-carotene. Most,42,43 but not all, trials44 have found that supplemental beta-carotene is not associated with a reduced risk of heart attacks.
Chondroitin Sulfate
Taking chondroitin sulfate may reduce the risk of heart attack in people with a history of heart disease or who are at risk for heart attack.Dose:
Refer to label instructionsChondroitin SulfateYears ago, researchers reported that taking for six years substantially reduced the risk of fatal and nonfatal heart attacks in people with . Chondroitin may work by inhibiting and by acting as an anticoagulant. The few doctors aware of these older studies sometimes recommend that people with a history of heart disease or who are at risk for heart attack take approximately 500 mg of chondroitin sulfate three times per day.Magnesium Oral
Supplementing with magnesium may reduce heart attack risk.Dose:
Refer to label instructionsMagnesium OralExcept for a link between high levels of magnesium in drinking water and a low risk of heart attacks,45,46 little evidence suggests that oral magnesium reduces heart attack risk. One trial found that magnesium pills taken for one year actually increased complications for people who had suffered a heart attack.47 While another study reported that 400–800 mg of magnesium per day for two years decreased both deaths and complications due to heart attacks, results are difficult to interpret because those taking oral magnesium had previously received intravenous magnesium as well.48 While increasing dietary magnesium has reduced the risk of heart attacks,49 foods high in magnesium may contain other protective factors that might be responsible for this positive effect. Therefore, evidence supporting supplemental oral magnesium to reduce the risk of heart attacks remains weak.Vitamin B12
Taking vitamin B12 may reduce blood levels of homocysteine. High homocysteine levels have been linked to an increased heart attack risk.Dose:
Refer to label instructionsVitamin B12High blood levels of the amino acid homocysteine have been linked to an increased risk of heart attack in most,50,51,52,53 though not all,54,55 studies. A blood test screening for levels of homocysteine, followed by supplementation with 400 mcg of folic acid and 500 mcg of vitamin B12 per day could prevent a significant number of heart attacks, according to one analysis.56Folic acid57,58 and vitamins B6 and B12 are known to lower homocysteine.59
There is a clear association between low blood levels of folate and increased risk of heart attacks in men.60 Based on the available research, some doctors recommend 50 mg of vitamin B6, 100–300 mcg of vitamin B12, and 500–800 mcg of folic acid per day for people at high risk of heart attack.
Vitamin B6
Taking vitamin B6 may reduce blood levels of homocysteine. High homocysteine levels have been linked to an increased heart attack risk.Dose:
Refer to label instructionsVitamin B6High blood levels of the amino acid homocysteine have been linked to an increased risk of heart attack in most,61,62,63,64 though not all,65,66 studies. A blood test screening for levels of homocysteine, followed by supplementation with 400 mcg of folic acid and 500 mcg of vitamin B12 per day could prevent a significant number of heart attacks, according to one analysis.67Folic acid68,69 and vitamins B6 and B12 are known to lower homocysteine.70
There is a clear association between low blood levels of folate and increased risk of heart attacks in men.71 Based on the available research, some doctors recommend 50 mg of vitamin B6, 100–300 mcg of vitamin B12, and 500–800 mcg of folic acid per day for people at high risk of heart attack.
Vitamin C
Vitamin C has been reported to protect blood vessels from problems associated with heart attack risk in a variety of ways.Dose:
Refer to label instructionsVitamin CVitamin C has been reported to protect blood vessels from problems associated with heart attack risk in a variety of ways.72,73,74 However, research attempting to link vitamin C directly to protection from heart attacks has been inconsistent.75,76 The reason for this discrepancy appears related to the amount of vitamin C intake investigated in these studies. True or marginal vitamin C deficiencies do appear to increase the risk of suffering heart attacks.77,78 However, in trials comparing acceptable (i.e., non-deficient) vitamin C levels to even higher levels, additional vitamin C has not been protective.79 Therefore, though many doctors recommend that people at high risk for heart attack take vitamin C—often 1 gram per day—most evidence currently suggests that consuming as little as 100–200 mg of vitamin C per day from food or supplements may well be sufficient.