A legit concern, but to put it in perspective:
Here's the List of ingredients in RJR cigarettes:
Ingredient, Percentage (max), purpose
Acetanisole 0.001 Flavor
Acetic Acid 0.001 Flavor
Acetoin <0.0001 Flavor
Acetophenone <0.0001 Flavor
2-Acetylpyrazine 0.001 Flavor
2-Acetyl Thiazole 0.001 Flavor
Ammonium Alginate 1.15 Formulation Aid
Ammonium Hydroxide 0.08 In Process pH Adjuster, Flavor
Amyris Oil <0.0001 Flavor
trans-Anethole 0.001 Flavor
Anisaldehyde 0.001 Flavor
Ascorbic Acid <0.0001 Flavor
Benzaldehyde 0.001 Flavor
Benzaldehyde Glyceryl Acetal 0.001 Flavor
Benzyl Alcohol 0.025 Flavor, Solvent
Benzyl Cinnamate 0.001 Flavor
Brown Sugar 2.9 Casing
n-Butyl Isovalerate 0.001 Flavor
Butyric Acid <0.001 Flavor
Caramel (Plain) 0.13 Flavor
Caramel Color 0.01 Flavor
Carbon11.77 Heat Source Constituent Utilized In Tobacco Heating Cigarettes
Carbon Dioxide Not Detectable Processing Aid
Cardamon Oil <0.0001 Flavor
Carob Bean Extract 0.095 Flavor
Carrot Seed Oil Terpeneless 0.001 Flavor
l-Carvone 0.025 Flavor
Cellulose Fiber 6.31 Formulation Aid
Chicory Extract 0.01 Flavor
Chocolate Liquor 0.27 Casing
Cinnamon Bark Oil <0.0001 Flavor
Citric Acid <0.0001 Flavor
Citronella Oil <0.0001 Flavor
Clary Sage Oil 0.001 Flavor
Cocoa (Extract, Powder, Extractive, Distillate) 1.84 Casing, Flavor
Coffee Beans, Ground 0.01 Flavor
Coffee Extract 0.065 Flavor
Coriander Oil 0.001 Flavor
Corn Syrup 0.025 Flavor
beta-Damascenone <0.0001 Flavor
beta-Damascone 0.01 Flavor
delta-Decalactone <0.0001 Flavor
gamma-Decalactone <0.0001 Flavor
Diammonium Phosphate 0.75 Flavor
4,5-Dimethyl-3-Hydroxy-2,5-Dihydrofuran-2-one 0.001 Flavor
2,5-Dimethylpyrazine 0.001 Flavor
Ethyl Acetate 0.001 Flavor
Ethyl Alcohol 0.298Flavor
Ethyl Benzoate <0.0001Flavor
Ethyl Butyrate 0.01Flavor
Ethyl Caproate 0.01Flavor
Ethyl Cyclotene <0.0001Flavor
Ethyl Heptanoate 0.01Flavor
Ethyl Lactate 0.01Flavor
Ethyl Levulinate 0.01Flavor
Ethyl Maltol 0.01Flavor
Ethyl Pentanoate 0.001Flavor
Ethyl Phenylacetate <0.0001Flavor
Ethyl Vanillin 0.025Flavor
Ethyl-2-Methylbutyrate 0.01Flavor
2-Ethyl-3,5(or 6)-Dimethylpyrazine 0.001Flavor
5-Ethyl-3-Hydroxy-4-Methyl-2(5H)-Furanone <0.0001Flavor
2-Ethyl-3-Methylpyrazine 0.001Flavor
Eucalyptol 0.01Flavor
Fenugreek Extract0.001Flavor
Fenugreek Seed0.01Flavor
Fig Juice Concentrate0.34Casing
Furaneol0.01Flavor
Geraniol<0.0001Flavor
Geranium Bourbon Oil<0.0001Flavor
Geranyl Acetone0.01Flavor
Glucose0.001Flavor
Glycerides, mixed decanoyl and octanoyl1.92Flavor
Glycerol11.12Humectant
Graphite3.34Heat Source Constituent Utilized In Tobacco Heating Cigarettes
Guar Gum1.8Formulation Aid
gamma-Heptalactone0.001Flavor
Hexanoic Acid0.001Flavor
Hexyl Acetate0.01Flavor
High Fructose Corn Syrup4.49Casing
Honey2.38Casing
Immortelle Extract0.01Flavor
Isoamyl Acetate0.01Flavor
Isoamyl Isovalerate0.01Flavor
Isoamyl Phenylacetate0.01Flavor
Isobutyl Phenylacetate0.01Flavor
Isovaleraldehyde<0.0001Flavor
Isovaleric Acid<0.0001Flavor
Lactic Acid0.025Flavor
Lemon Oil, Terpeneless0.001Flavor
Licorice0.74Casing, Flavor
Licorice Extract Powder0.01Flavor
Lime Oil0.001Flavor
Linalool0.001Flavor
Linalyl Acetate0.001Flavor
Lovage Root0.001Flavor
Maltol0.01Flavor
Mandarin Oil0.001Flavor
Mate Extract<0.0001Flavor
Menthol3.17Flavor
l-Menthone0.001Flavor
2-Methoxy-3-Methyl-Pyrazine0.001Flavor
2-Methoxy-4-Methylphenol0.001Flavor
2-Methyl Pentanoic Acid0.001Flavor
Methyl Salicylate0.001Flavor
Methyl-2-Pyrrolyl Ketone0.001Flavor
6-Methyl-3,5-Heptadien-2-one0.001Flavor
4-Methylacetophenone0.001Flavor
2-Methylbutyric Acid0.001Flavor
Methylcyclopentenolone0.01Flavor
2-Methylpyrazine0.001Flavor
3-Methylvaleric Acid0.001Flavor
Myrrh Extract<0.0001Flavor
Myrrh Oil0.001Flavor
Neroli Bigarade Oil<0.0001Flavor
Nerolidol<0.0001Flavor
gamma-Nonalactone<0.0001Flavor
Octanoic Acid<0.0001Flavor
Orange Oil0.01Flavor
Orange Oil Sweet Terpeneless0.01Flavor
Orange Oil Terpeneless0.01Flavor
Orris Root Extract0.001Flavor
2,3-Pentanedione0.001Flavor
Peppermint Oil, Terpeneless0.05Flavor
Peru Balsam Oil0.001Flavor
Phenylacetic Acid0.001Flavor
Phenylethyl Acetate<0.0001Flavor
Phenylethyl Alcohol<0.0001Flavor
alpha-Pinene0.01Flavor
beta-Pinene0.01Flavor
Piperonal0.01Flavor
Potassium Carbonate2.07Flavor
Potassium Sorbate0.001Preservative
Propyl Acetate<0.0001Flavor
Propylene Glycol1.9Solvent, Humectant, Flavor
Prune Juice Concentrate0.47Casing
Rose Oil Turkish0.001Flavor
Rosemary Oil<0.0001Flavor
Salicylic Aldehyde<0.0001Flavor
Sandalwood Oil, Yellow<0.0001Flavor
Sodium Carbonate0.18Heat Source Constituent Utilized In Tobacco Heating Cigarettes
Sodium Citrate<0.0001Flavor
Spearmint Oil0.38Flavor
Sucrose2.13Casing
Tangerine Oil, Terpeneless0.01Flavor
alpha-Terpineol<0.0001Flavor
Terpinyl Acetate0.001Flavor
5,6,7,8-Tetrahydroquinoxaline0.001Flavor
2,3,5,6-Tetramethylpyrazine0.001Flavor
Triethyl Citrate0.001Flavor
2,6,6-Trimethyl-2-Cyclohexene-1, 4-Dione<0.0001Flavor
2,3,5-Trimethylpyrazine0.001Flavor
delta-Undecalactone<0.0001Flavor
gamma-Undecalactone0.01Flavor
Vanilla Oleoresin0.01Flavor
Vanillin0.05Flavor
Veratraldehyde0.001Flavor
WaterNASolvent, Processing Aid, Humectan