RH Herbal Formulation & Therapeutic Applications 2 — Questions and Answers
Question 1: Which extraction method is best suited for obtaining volatile aromatic compounds from herbs?
- Cold maceration in water
- Steam distillation (Correct answer)
- Decoction
- Acid-base extraction
Correct answer: Steam distillation
Steam distillation is the standard method for extracting volatile aromatic compounds (essential oils) because it separates them without degrading heat-sensitive constituents.
Question 2: A client with a sensitive stomach needs a bitter tonic formula. Which preparation best mitigates GI irritation while preserving bitters activity?
- High-alcohol tincture taken neat
- Glycerite of the bitter herb (Correct answer)
- Strong decoction taken on an empty stomach
- Powdered herb in capsules
Correct answer: Glycerite of the bitter herb
A glycerite uses glycerin as the solvent, which is gentler on sensitive stomachs while still extracting bitter compounds effectively.
Question 3: In a 1:5 tincture ratio, what does the '5' represent?
- 5 parts herb to 1 part solvent
- 5 parts solvent to 1 part herb by weight (Correct answer)
- 5% alcohol concentration
- Five active constituents extracted
Correct answer: 5 parts solvent to 1 part herb by weight
The second number in a tincture ratio represents the volume of solvent (in mL) per gram of dried herb, so 1:5 means 1 g herb per 5 mL solvent.
Question 4: Which herbal preparation would deliver the highest concentration of water-soluble polysaccharides from astragalus root?
- Alcohol tincture (70%)
- Cold water infusion
- Long-simmered decoction (Correct answer)
- CO2 supercritical extract
Correct answer: Long-simmered decoction
Polysaccharides are large, water-soluble molecules best extracted by prolonged simmering (decoction), not by alcohol or short cold infusions.
Question 5: When formulating an adaptogenic tonic for long-term use, which delivery form is most practical for daily compliance?
- Suppository
- Single-dose injection
- Standardized extract capsule or powder (Correct answer)
- Fomentation applied topically
Correct answer: Standardized extract capsule or powder
Standardized extract capsules or powders are convenient, shelf-stable, and consistent in dosing, making them ideal for long-term adaptogen protocols.
Question 6: Which action best describes herbs like ginger and black pepper when added to a formula targeting poor circulation?
- Demulcent
- Synergist/diffusive (Correct answer)
- Nervine sedative
- Astringent
Correct answer: Synergist/diffusive
Ginger and black pepper act as diffusives and synergists, improving circulation and enhancing the bioavailability and distribution of other formula constituents.
Question 7: A herbalist wants to preserve a fresh plant extract without alcohol. Which preservative system is most appropriate?
- Distilled water alone
- Glycerin at 55–60% concentration (Correct answer)
- Olive oil
- Dilute acetic acid (vinegar) at 5%
Correct answer: Glycerin at 55–60% concentration
Glycerin at 55–60% acts as an effective preservative by reducing water activity, inhibiting microbial growth without the use of alcohol.
RH Herbal Formulation & Therapeutic Applications 2
Which extraction method is best suited for obtaining volatile aromatic compounds from herbs?