Don't need mo biotin: Biotin deficiency is very very rare. It is trendy right now to take if for hair and nails. Going beyond 100 mcg per day is not necessary and there is no evidence of benefit beyond this amount. Biotin is a water soluble B vitamin, so your body *probably* would simply pee out the extra.
You do not compare two things. The following guidelines apply to the superlative: 1-syllable adjectives: add-est to the adjective (plus the). 1  My sister is the tallest in our family. 2  Yesterday was the coldest day of the year so far.
adj. 1. of outstanding quality, degree, etc; supreme. 2. (Grammar) grammar denoting the form of an adjective or adverb that expresses the highest or a very high degree of quality. In English the superlative degree is usually marked by the suffix-est or the word most, as in loudest or most loudly.